第三次博客作业

第三次博客作业

一、  前言

又经过一段时间的学习，我在Java这门课程上又多学到了一些知识点。难度方面，或许是为了减轻一些我们在Java这门课程上的压力，最近三次的PTA作业简单了一些。基本上只要投入了足够的时间就可以完成，并且这三次作业也是迭代的。题量方面，这三次作业题量都很少，只有两三道题目。大概是因为网课上得太久了，做PTA的心情有点懈怠，好在我还是及时地完成了。这三次作业情况如下：

1.   题目集08

知识点主要有：容器，集合的应用，接口的实现，继承等。

2.   题目集09

知识点主要有：有序集合，迭代器以及题目集08中的知识点。

3.   题目集10

知识点主要有：正则表达式的应用，字符串的处理，多态的应用以及上一个题目集中的知识点。

 

二、  设计与分析

下面我将要对这三次的题目集进行详细分析，重点是对源码的分析，解释和完成题目后的心得。分析如下：（以下均是我个人的理解，可能与标准说法不同，请见谅）

1.   题目集08

7-1 电信计费系列1-座机计费

    本题思路是先将输入的不同信息储存至不同的数组中，同时判断是否有重复的信息，再进行实例化：如果输入的是开户的信息，那么先存入一个字符串数组，判断无重复信息后，对于每条开户信息创建一个User对象，储存至一个只存入User对象的容器中；如果输入的是通讯记录，同上，存入不同的数组和容器中。之后，对每条通讯记录进行详细操作。在判断通讯记录的格式时，所用的正则表达式非常繁琐，主要是后面日期格式的判断不容易实现。

源码如下：

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import java.util.Date;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) throws ParseException {
        Scanner in = new Scanner(System.in);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");
        DecimalFormat d = new DecimalFormat("0.0");
        ArrayList<User> Users = new ArrayList<User>();
        String[] str = new String[100];
        String[] users = new String[100];
        String[] userRecords = new String[100];
        int c=0,k=0,m=0;
        for(int i=0;;i++) {
            str[i]=in.nextLine();
            c++;
            if(str[i].contains("end"))
                break;
        }
         
        for(int i=0;i<c-1;i++) {
            if(str[i].matches("u-0791[\\d]{7,8} 0")) {
                boolean exist = false;
                for(int j=0;j<k;j++) {
                    if(users[j].equals(str[i]))
                        exist = true;
                }
                if(!exist) {
                    users[k] = str[i];
                    k++;
                }
            }else if(str[i].matches("t-(\\d){11,12}\\s(\\d){10,12}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){
                 
                userRecords[m] = str[i];
                m++;
            }
        }
         
        for(int i=0;i<k;i++) {
            Users.add(new User(users[i]));
            for(int j=0;j<m;j++) {
                String[] sub = userRecords[j].split(" ");
                if(sub[0].substring(2,sub[0].length()).matches(Users.get(i).getNumber())) {
                    if(sub[1].substring(0, 4).matches("0791"))
                        Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5])));
                    else if(sub[1].substring(0, 4).matches("(079\\d)|(0701)"))
                        Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5])));
                    else
                        Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5])));
                }
            }
        }
         
         
        Collections.sort(Users);
        for(User e:Users) {
            System.out.println(e.getNumber()+" "+d.format(e.calCost())+" "+d.format(e.calBalance()));
        }
         
    }
 
}
 
class User implements Comparable<User>{
    UserRecord userRecords = new UserRecord();
    private double balance = 100;
    private ChargeMode chargeMode;
    private String number;
     
    public User(String str) {
        this.number = str.substring(2,str.length()-2);
        if(str.charAt(str.length()-1) == '0')
            this.setChargeMode(new LandPhoneCharge());
    }
     
    public double calBalance() {
        return balance-chargeMode.getMonthlyRent()-calCost();
    }
    public double calCost() {
        double cost1 = 0,cost2 = 0,cost3 = 0;
         
        for(int i=0;i<userRecords.getCallInCity().size();i++) {
            long time = userRecords.getCallInCity().get(i).getEnd().getTime()-userRecords.getCallInCity().get(i).getStart().getTime();
            if(time%(1000*60)==0)
                cost1 += 0.1*(time/(1000*60));
            else
                cost1 += 0.1*(time/(1000*60)+1);
        }
        for(int i=0;i<userRecords.getCallInProvince().size();i++) {
            long time = userRecords.getCallInProvince().get(i).getEnd().getTime()-userRecords.getCallInProvince().get(i).getStart().getTime();
            if(time%(1000*60)==0)
                cost2 += 0.3*(time/(1000*60));
            else
                cost2 += 0.3*(time/(1000*60)+1);
        }
        for(int i=0;i<userRecords.getCallInLand().size();i++) {
            long time = userRecords.getCallInLand().get(i).getEnd().getTime()-userRecords.getCallInLand().get(i).getStart().getTime();
            if(time%(1000*60)==0)
                cost3 += 0.6*(time/(1000*60));
            else
                cost3 += 0.6*(time/(1000*60)+1);
        }
        return cost1+cost2+cost3;
         
    }
    public UserRecord getUserRecords() {
        return userRecords;
    }
    public void setUserRecords(UserRecord ur) {
        userRecords = ur;
    }
    public double getBalance() {
        return balance;
    }
    public ChargeMode getChargeMode() {
        return chargeMode;
    }
    public void setChargeMode(ChargeMode cm) {
        chargeMode = cm;
    }
    public String getNumber() {
        return number;
    }
    public void setNumber(String n) {
        number = n;
    }
 
    @Override
    public int compareTo(User o) {
        return this.getNumber().compareTo(o.getNumber());
    }
}
 
class UserRecord{
    private ArrayList<CallRecord> callInCity = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> callInProvince = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> callInLand = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> answerInCity = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> answerInProvince = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> answerInLand = new ArrayList<CallRecord>();
    private ArrayList<MessageRecord> sendMessage = new ArrayList<MessageRecord>();
    private ArrayList<MessageRecord> receiveMessage = new ArrayList<MessageRecord>();
     
    public void addCallInCity(CallRecord cr) {
        callInCity.add(cr);
    }
    public void addCallInProvince(CallRecord cr) {
        callInProvince.add(cr);
    }
    public void addCallInLand(CallRecord cr) {
        callInLand.add(cr);
    }
    public void addAnswerInCity(CallRecord cr) {
        answerInCity.add(cr);
    }
    public void addAnswerInProvince(CallRecord cr) {
        answerInProvince.add(cr);
    }
    public void addAnswerInLand(CallRecord cr) {
        answerInLand.add(cr);
    }
    public void addSendMessage(MessageRecord mr) {
        sendMessage.add(mr);
    }
    public void addReceiveMessage(MessageRecord mr) {
        receiveMessage.add(mr);
    }
    public ArrayList<CallRecord> getCallInCity() {
        return callInCity;
    }
    public ArrayList<CallRecord> getCallInProvince() {
        return callInProvince;
    }
    public ArrayList<CallRecord> getCallInLand() {
        return callInLand;
    }
    public ArrayList<CallRecord> getAnswerInCity() {
        return answerInCity;
    }
    public ArrayList<CallRecord> getAnswerInProvince() {
        return answerInProvince;
    }
    public ArrayList<CallRecord> getAnswerInLand() {
        return answerInLand;
    }
    public ArrayList<MessageRecord> getSendMessage() {
        return sendMessage;
    }
    public ArrayList<MessageRecord> getReceiveMessage() {
        return receiveMessage;
    }
}
 
abstract class ChargeMode{
    private ArrayList<ChargeRule> chargeRules = new ArrayList<>();
     
    public ArrayList<ChargeRule> getChargeRules(){
        return chargeRules;
    }
    public void setChargeRules(ArrayList<ChargeRule> cr) {
        chargeRules = cr;
    }
    public double calCost(UserRecord ur) {
        return 0;
    }
    public double getMonthlyRent() {
        return 20;
    }
}
 
class LandPhoneCharge extends ChargeMode{
    private double monthlyRent = 20;
     
    @Override
    public double calCost(UserRecord ur) {
        return 0;
    }
    @Override
    public double getMonthlyRent() {
        return monthlyRent;
    }
}
 
abstract class ChargeRule{
     
}
 
abstract class CallChangeRule extends ChargeRule{
    public double calCost(ArrayList<CallRecord> cr) {
        return 0;
    }
}
 
class CityRule extends CallChangeRule{
    @Override
    public double calCost(ArrayList<CallRecord> cr) {
        // TODO Auto-generated method stub
        return super.calCost(cr);
    }
}
 
class ProvinceRule extends CallChangeRule{
    @Override
    public double calCost(ArrayList<CallRecord> cr) {
        // TODO Auto-generated method stub
        return super.calCost(cr);
    }
}
 
class LandRule extends CallChangeRule{
    @Override
    public double calCost(ArrayList<CallRecord> cr) {
        // TODO Auto-generated method stub
        return super.calCost(cr);
    }
}
 
abstract class CommunicationRecord{
    String callNumber;
    String answerNumber;
     
    public String getCallNumber() {
        return callNumber;
    }
    public void setCallNumber(String cn) {
        callNumber = cn;
    }
    public String getAnswerNumber() {
        return answerNumber;
    }
    public void setAnswerNumber(String an) {
        answerNumber = an;
    }
}
 
class CallRecord extends CommunicationRecord{
    private Date start;
    private Date end;
    private String callCode;
    private String answerCode;
     
    public CallRecord(Date start,Date end) {
        this.start = start;
        this.end = end;
    }
     
    public Date getStart() {
        return start;
    }
    public void setStart(Date start) {
        this.start = start;
    }
    public Date getEnd() {
        return end;
    }
    public void setEnd(Date end) {
        this.end = end;
    }
    public String getCallCode() {
        return callCode;
    }
    public void setCallCode(String callCode) {
        this.callCode = callCode;
    }
    public String getAnswerCode() {
        return answerCode;
    }
    public void setAnswerCode(String answerCode) {
        this.answerCode = answerCode;
    }
     
}
 
class MessageRecord extends CommunicationRecord{
    private String message;
 
    public String getMessage() {
        return message;
    }
 
    public void setMessage(String message) {
        this.message = message;
    }
 
}

　　

2.   题目集09

7-1 电信计费系列2-手机+座机计费

 

本题是在题目集08第一题的基础上进行改进，增加了手机用户。在处理每条有手机用户的通讯记录时，同时需要判断手机用户所在的地区。总而言之，通讯记录的判断和处理更加详细，也更加繁琐了。需要创建手机用户的计费方式，之后在主函数中增加和修改亿点点就可以完成了。因为当时有点懈怠，做的时间比较晚，所以只得了97分，差3分，有点可惜。源码如下（部分）：

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public class Main {
 
    public static void main(String[] args) throws ParseException {
        Scanner in = new Scanner(System.in);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");
        DecimalFormat d = new DecimalFormat("0.0");
        ArrayList<User> Users = new ArrayList<>();
        String[] str = new String[100];
        String[] users = new String[100];
        String[] userRecords = new String[100];
        int c=0,k=0,m=0;
        for(int i=0;;i++) {
            str[i]=in.nextLine();
            c++;
            if(str[i].contains("end"))
                break;
        }
         
        for(int i=0;i<c-1;i++) {
            if(str[i].matches("u-0791[\\d]{7,8} 0")||str[i].matches("u-1[\\d]{10} 1")) {
                boolean exist = false;
                for(int j=0;j<k;j++) {
                    if(users[j].equals(str[i]))
                        exist = true;
                }
                if(!exist) {
                    users[k] = str[i];
                    k++;
                }
            }else if(str[i].matches("t-0(\\d){9,11}\\s0(\\d){9,11}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){
                 
                userRecords[m] = str[i];
                m++;
            }else if(str[i].matches("t-1(\\d){10}\\s0(\\d){2,3}\\s(\\d){10,12}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){
                 
                userRecords[m] = str[i];
                m++;
            }else if(str[i].matches("t-0(\\d){9,11}\\s1(\\d){10}\\s(\\d){3,4}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){
                 
                userRecords[m] = str[i];
                m++;
            }else if(str[i].matches("t-1(\\d){10}\\s0(\\d){2,3}\\s1(\\d){10}\\s0(\\d){2,3}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){
                 
                userRecords[m] = str[i];
                m++;
            }
             
        }
         
        for(int i=0;i<k;i++) {
            Users.add(new User(users[i]));
        }
         
        for(int i=0;i<k;i++) {
            for(int j=0;j<m;j++) {
                String[] sub = userRecords[j].split(" ");
                if(sub[0].substring(2,sub[0].length()).matches(Users.get(i).getNumber())) {
                    if(sub[1].matches("0791[\\d]{7,8}"))
                        Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5]),sub[0],sub[1]));
                    else if(sub[1].matches("((079[\\d])|(0701))[\\d]{7,8}"))
                        Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5]),sub[0],sub[1]));
                    else if(sub[1].matches("0(\\d){9,11}"))
                        Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5]),sub[0],sub[1]));
                    else if(sub[2].matches("0791[\\d]{7,8}"))
                        Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0]+" "+sub[1],sub[2]));
                    else if(sub[2].matches("((079[\\d])|(0701))[\\d]{7,8}"))
                        Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0]+" "+sub[1],sub[2]));
                    else if(sub[2].matches("0(\\d){9,11}"))
                        Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0]+" "+sub[1],sub[2]));
                    else if(sub[2].matches("0791")) {
                        Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[1]));
                         
                    }else if(sub[2].matches("(079[\\d])|(0701)")) {
                        Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[1]));
                         
                    }else if(sub[2].matches("0(\\d){2,3}")) {
                        Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[1]));
                    }else if(sub[3].matches("0791")) {
                        Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));
                         
                    }else if(sub[3].matches("(079[\\d])|(0701)")) {
                        Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));
                         
                    }else if(sub[3].matches("0(\\d){2,3}")) {
                        Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));
                    }
                     
                }else if(sub[1].matches(Users.get(i).getNumber())) {
                    if(sub[0].substring(2,6).matches("0791"))
                            continue;
                    else if(sub[0].substring(2,6).matches("(079[\\d])|(0701)"))
                        continue;
                    else if(sub[0].substring(2,6).matches("0(\\d){3}")) {
                        Users.get(i).userRecords.addAnswerInLand(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[2]));
                    }
                }else if(sub[2].matches(Users.get(i).getNumber())) {
                    if(sub[1].matches("0791"))
                        continue;
                    else if(sub[1].matches("(079[\\d])|(0701)"))
                        continue;
                    else if(sub[1].matches("0(\\d){2,3}")) {
                        Users.get(i).userRecords.addAnswerInLand(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));
                    }
                }
            }
        }
         
         
        Collections.sort(Users);
        for(User e:Users) {
            System.out.println(e.getNumber()+" "+d.format(e.calCost())+" "+d.format(e.calBalance()));
        }
         
    }
 
}
手机用户的计费方式如下：
    class MovePhoneCharge extends ChargeMode{
    private double monthlyRent = 15;
     
    @Override
    public double calCost(UserRecord userRecords) {
        double cost1 = 0,cost2 = 0,cost3 = 0,cost4 = 0;
        double rate1 = 0,rate2 = 0,rate3 = 0;
         
        for(int i=0;i<userRecords.getCallInCity().size();i++) {
            if(userRecords.getCallInCity().get(i).getCallCode().split(" ")[1].matches("0791"))
                rate1 = 0.1;
            else if(userRecords.getCallInCity().get(i).getCallCode().split(" ")[1].matches("(079\\d)|(0710)"))
                rate1 = 0.3;
            else
                rate1 = 0.6;
             
            long time = userRecords.getCallInCity().get(i).getEnd().getTime()-userRecords.getCallInCity().get(i).getStart().getTime();
            if(time%(1000*60)==0)
                cost1 += rate1*(time/(1000*60));
            else
                cost1 += rate1*(time/(1000*60)+1);
        }
        for(int i=0;i<userRecords.getCallInProvince().size();i++) {
            if(userRecords.getCallInProvince().get(i).getCallCode().split(" ")[1].matches("0791"))
                rate2 = 0.2;
            else if(userRecords.getCallInProvince().get(i).getCallCode().split(" ")[1].matches("(079\\d)|(0710)"))
                rate2 = 0.3;
            else
                rate2 = 0.6;
            long time = userRecords.getCallInProvince().get(i).getEnd().getTime()-userRecords.getCallInProvince().get(i).getStart().getTime();
            if(time%(1000*60)==0)
                cost2 += rate2*(time/(1000*60));
            else
                cost2 += rate2*(time/(1000*60)+1);
        }
        for(int i=0;i<userRecords.getCallInLand().size();i++) {
            if(userRecords.getCallInLand().get(i).getCallCode().split(" ")[1].matches("0791"))
                rate3 = 0.3;
            else if(userRecords.getCallInLand().get(i).getCallCode().split(" ")[1].matches("(079\\d)|(0710)"))
                rate3 = 0.3;
            else
                rate3 = 0.6;
            long time = userRecords.getCallInLand().get(i).getEnd().getTime()-userRecords.getCallInLand().get(i).getStart().getTime();
            if(time%(1000*60)==0)
                cost3 += rate3*(time/(1000*60));
            else
                cost3 += rate3*(time/(1000*60)+1);
        }
        for(int i=0;i<userRecords.getAnswerInLand().size();i++) {
            long time = userRecords.getAnswerInLand().get(i).getEnd().getTime()-userRecords.getAnswerInLand().get(i).getStart().getTime();
            if(time%(1000*60)==0)
                cost4 += 0.3*(time/(1000*60));
            else
                cost4 += 0.3*(time/(1000*60)+1);
        }
        return cost1+cost2+cost3+cost4;
    }
    @Override
    public double getMonthlyRent() {
        return monthlyRent;
    }
}

　　

3.   题目集10

7-1 电信计费系列3-短信计费

 

本题只需要考虑开户信息和短信，在题目集09的基础上进行一些删改就可以完成了。可以说，这次题目集是这三次作业中最轻松的一次了，因为之前都把基础做好了。源码如下：

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import java.util.Date;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) throws ParseException {
        Scanner in = new Scanner(System.in);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");
        DecimalFormat d = new DecimalFormat("0.0");
        ArrayList<User> Users = new ArrayList<>();
        String[] str = new String[100];
        String[] users = new String[100];
        String[] userRecords = new String[100];
        int c=0,k=0,m=0;
        for(int i=0;;i++) {
            str[i]=in.nextLine();
            c++;
            if(str[i].contains("end"))
                break;
        }
         
        for(int i=0;i<c-1;i++) {
            if(str[i].matches("u-1\\d{10} 3")) {
                boolean exist = false;
                for(int j=0;j<k;j++) {
                    if(users[j].equals(str[i]))
                        exist = true;
                }
                if(!exist) {
                    users[k] = str[i];
                    k++;
                }
            }else if(str[i].matches("m-1\\d{10} 1\\d{10} ([\\d]|[A-Z]|[a-z]| |\\.|\\,)*")) {
                userRecords[m] = str[i];
                m++;
            }
             
        }
         
        for(int i=0;i<k;i++) {
            Users.add(new User(users[i]));
            for(int j=0;j<m;j++) {
                if(userRecords[j].substring(2,13).matches(Users.get(i).getNumber())) {
                    Users.get(i).userRecords.addSendMessage(new MessageRecord(userRecords[j].substring(26)));
                }
            }
        }
         
         
        Collections.sort(Users);
        for(User e:Users) {
            System.out.println(e.getNumber()+" "+d.format(e.calCost())+" "+d.format(e.calBalance()));
        }
         
    }
 
}
 
class User implements Comparable<User>{
    UserRecord userRecords = new UserRecord();
    private double balance = 100;
    private ChargeMode chargeMode;
    private String number;
     
    public User(String str) {
        this.number = str.substring(2,str.length()-2);
        if(str.charAt(str.length()-1) == '3')
            this.setChargeMode(new MovePhoneMessageCharge());
    }
     
    public double calBalance() {
        return balance-chargeMode.getMonthlyRent()-calCost();
    }
    public double calCost() {
        return chargeMode.calCost(userRecords);
         
    }
    public UserRecord getUserRecords() {
        return userRecords;
    }
    public void setUserRecords(UserRecord ur) {
        userRecords = ur;
    }
    public double getBalance() {
        return balance;
    }
    public ChargeMode getChargeMode() {
        return chargeMode;
    }
    public void setChargeMode(ChargeMode cm) {
        chargeMode = cm;
    }
    public String getNumber() {
        return number;
    }
    public void setNumber(String n) {
        number = n;
    }
 
    @Override
    public int compareTo(User o) {
        return this.getNumber().compareTo(o.getNumber());
    }
}
 
class UserRecord{
    private ArrayList<CallRecord> callInCity = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> callInProvince = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> callInLand = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> answerInCity = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> answerInProvince = new ArrayList<CallRecord>();
    private ArrayList<CallRecord> answerInLand = new ArrayList<CallRecord>();
    private ArrayList<MessageRecord> sendMessage = new ArrayList<MessageRecord>();
    private ArrayList<MessageRecord> receiveMessage = new ArrayList<MessageRecord>();
     
    public void addCallInCity(CallRecord cr) {
        callInCity.add(cr);
    }
    public void addCallInProvince(CallRecord cr) {
        callInProvince.add(cr);
    }
    public void addCallInLand(CallRecord cr) {
        callInLand.add(cr);
    }
    public void addAnswerInCity(CallRecord cr) {
        answerInCity.add(cr);
    }
    public void addAnswerInProvince(CallRecord cr) {
        answerInProvince.add(cr);
    }
    public void addAnswerInLand(CallRecord cr) {
        answerInLand.add(cr);
    }
    public void addSendMessage(MessageRecord mr) {
        sendMessage.add(mr);
    }
    public void addReceiveMessage(MessageRecord mr) {
        receiveMessage.add(mr);
    }
    public ArrayList<CallRecord> getCallInCity() {
        return callInCity;
    }
    public ArrayList<CallRecord> getCallInProvince() {
        return callInProvince;
    }
    public ArrayList<CallRecord> getCallInLand() {
        return callInLand;
    }
    public ArrayList<CallRecord> getAnswerInCity() {
        return answerInCity;
    }
    public ArrayList<CallRecord> getAnswerInProvince() {
        return answerInProvince;
    }
    public ArrayList<CallRecord> getAnswerInLand() {
        return answerInLand;
    }
    public ArrayList<MessageRecord> getSendMessage() {
        return sendMessage;
    }
    public ArrayList<MessageRecord> getReceiveMessage() {
        return receiveMessage;
    }
}
 
abstract class ChargeMode{
    private ArrayList<ChargeRule> chargeRules = new ArrayList<>();
     
    public ArrayList<ChargeRule> getChargeRules(){
        return chargeRules;
    }
    public void setChargeRules(ArrayList<ChargeRule> cr) {
        chargeRules = cr;
    }
    public double calCost(UserRecord ur) {
        return 0;
    }
    public double getMonthlyRent() {
        return 20;
    }
}
 
 
class MovePhoneMessageCharge extends ChargeMode{
    private double monthlyRent = 0;
     
    public double calCost(UserRecord userRecords) {
        double cost = 0;
        int ml = 0;
        double cal = 0;
        for(int i=0;i<userRecords.getSendMessage().size();i++) {
            cal = userRecords.getSendMessage().get(i).getMessage().length()/10.0;
            if(cal%1!=0)
                cal = cal+1.0;
            ml += (int)cal;
        }
        if(ml<=3)
            cost = 0.1*ml;
        else if(ml<=5)
            cost = 0.3+0.2*(ml-3);
        else if(ml>5)
            cost = 0.7+0.3*(ml-5);
        return cost;
    }
    @Override
    public double getMonthlyRent() {
        return monthlyRent;
    }
}
 
abstract class ChargeRule{
     
}
 
abstract class CallChangeRule extends ChargeRule{
    public double calCost(ArrayList<CallRecord> cr) {
        return 0;
    }
}
 
class CityRule extends CallChangeRule{
    @Override
    public double calCost(ArrayList<CallRecord> cr) {
        // TODO Auto-generated method stub
        return super.calCost(cr);
    }
}
 
class ProvinceRule extends CallChangeRule{
    @Override
    public double calCost(ArrayList<CallRecord> cr) {
        // TODO Auto-generated method stub
        return super.calCost(cr);
    }
}
 
class LandRule extends CallChangeRule{
    @Override
    public double calCost(ArrayList<CallRecord> cr) {
        // TODO Auto-generated method stub
        return super.calCost(cr);
    }
}
 
abstract class CommunicationRecord{
    String callNumber;
    String answerNumber;
     
    public String getCallNumber() {
        return callNumber;
    }
    public void setCallNumber(String cn) {
        callNumber = cn;
    }
    public String getAnswerNumber() {
        return answerNumber;
    }
    public void setAnswerNumber(String an) {
        answerNumber = an;
    }
}
 
class CallRecord extends CommunicationRecord{
    private Date start;
    private Date end;
    private String callCode;
    private String answerCode;
     
    public CallRecord(Date start,Date end ,String callCode, String answerCode) {
        this.start = start;
        this.end = end;
        this.callCode = callCode;
        this.answerCode = answerCode;
    }
     
    public Date getStart() {
        return start;
    }
    public void setStart(Date start) {
        this.start = start;
    }
    public Date getEnd() {
        return end;
    }
    public void setEnd(Date end) {
        this.end = end;
    }
    public String getCallCode() {
        return callCode;
    }
    public void setCallCode(String callCode) {
        this.callCode = callCode;
    }
    public String getAnswerCode() {
        return answerCode;
    }
    public void setAnswerCode(String answerCode) {
        this.answerCode = answerCode;
    }
     
}
 
class MessageRecord extends CommunicationRecord{
    private String message;
 
    public MessageRecord(String m) {
        message = m;
    }
     
    public String getMessage() {
        return message;
    }
 
}

　

 三、 采坑心得

在完成这3次题目集的过程中，我遇到了一些的问题，下面将对我遇到一些的问题分享一下我的心得：

首先，日期的转化问题。将字符串按格式转化为日期时，需要在转化发生的函数后面

加上throws ParseException，也就是需要抛出异常；其次，用户排序的问题。一开始我使用的是for循环来进行排序，测试用例的输出结果是正确的，但是一直过不了测试点。在和室友的排序方法进行对比后，我发现了问题所在，于是采用了Collections.sort(Users)这种方式来进行排序，顺利地通过了全部测试点。

四、  改进建议

前面说道，我判断通讯记录的正则表达式十分繁琐，这是一个急需改进的地方。SimpleDateFormat类可以对日期进行格式化，可是我对此并没有很了解，应用起来十分困难，希望之后可以熟练应用。

五、  总结

在完成这三次题目集的过程中，我遇到了很多困难，也收获了很多知识点。尽管我总是被难题虐到心累，我还是愿意继续不断的尝试，直到正确。之后，我需要学习和改进的地方还有很多，但是我会尽量使自己变得更优秀。靠自己的努力得到的满分，才是满满的成就感！

 

第三次博客作业

一、  前言

又经过一段时间的学习，我在Java这门课程上又多学到了一些知识点。难度方面，或许是为了减轻一些我们在Java这门课程上的压力，最近三次的PTA作业简单了一些。基本上只要投入了足够的时间就可以完成，并且这三次作业也是迭代的。题量方面，这三次作业题量都很少，只有两三道题目。大概是因为网课上得太久了，做PTA的心情有点懈怠，好在我还是及时地完成了。这三次作业情况如下：

1.   题目集08

知识点主要有：容器，集合的应用，接口的实现，继承等。

2.   题目集09

知识点主要有：有序集合，迭代器以及题目集08中的知识点。

3.   题目集10

知识点主要有：正则表达式的应用，字符串的处理，多态的应用以及上一个题目集中的知识点。

 

二、  设计与分析

下面我将要对这三次的题目集进行详细分析，重点是对源码的分析，解释和完成题目后的心得。分析如下：（以下均是我个人的理解，可能与标准说法不同，请见谅）

1.   题目集08

7-1 电信计费系列1-座机计费

    本题思路是先将输入的不同信息储存至不同的数组中，同时判断是否有重复的信息，再进行实例化：如果输入的是开户的信息，那么先存入一个字符串数组，判断无重复信息后，对于每条开户信息创建一个User对象，储存至一个只存入User对象的容器中；如果输入的是通讯记录，同上，存入不同的数组和容器中。之后，对每条通讯记录进行详细操作。在判断通讯记录的格式时，所用的正则表达式非常繁琐，主要是后面日期格式的判断不容易实现。

源码如下：

import java.util.Date;

import java.text.DecimalFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

 

public class Main {

 

    public static void main(String[] args) throws ParseException {

        Scanner in = new Scanner(System.in);

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");

        DecimalFormat d = new DecimalFormat("0.0");

        ArrayList<User> Users = new ArrayList<User>();

        String[] str = new String[100];

        String[] users = new String[100];

        String[] userRecords = new String[100];

        int c=0,k=0,m=0;

        for(int i=0;;i++) {

            str[i]=in.nextLine();

            c++;

            if(str[i].contains("end"))

                break;

        }

       

        for(int i=0;i<c-1;i++) {

            if(str[i].matches("u-0791[\\d]{7,8} 0")) {

                boolean exist = false;

                for(int j=0;j<k;j++) {

                   if(users[j].equals(str[i]))

                       exist = true;

                }

                if(!exist) {

                   users[k] = str[i];

                   k++;

                }

            }else if(str[i].matches("t-(\\d){11,12}\\s(\\d){10,12}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){

               

                userRecords[m] = str[i];

                m++;

            }

        }

       

        for(int i=0;i<k;i++) {

            Users.add(new User(users[i]));

            for(int j=0;j<m;j++) {

                String[] sub = userRecords[j].split(" ");

                if(sub[0].substring(2,sub[0].length()).matches(Users.get(i).getNumber())) {

                   if(sub[1].substring(0, 4).matches("0791"))

                       Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5])));

                    else if(sub[1].substring(0, 4).matches("(079\\d)|(0701)"))

                       Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5])));

                   else

                       Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5])));

                }

            }

        }

       

       

        Collections.sort(Users);

        for(User e:Users) {

            System.out.println(e.getNumber()+" "+d.format(e.calCost())+" "+d.format(e.calBalance()));

        }

       

    }

 

}

 

class User implements Comparable<User>{

    UserRecord userRecords = new UserRecord();

    private double balance = 100;

    private ChargeMode chargeMode;

    private String number;

   

    public User(String str) {

        this.number = str.substring(2,str.length()-2);

        if(str.charAt(str.length()-1) == '0')

            this.setChargeMode(new LandPhoneCharge());

    }

   

    public double calBalance() {

        return balance-chargeMode.getMonthlyRent()-calCost();

    }

    public double calCost() {

        double cost1 = 0,cost2 = 0,cost3 = 0;

       

        for(int i=0;i<userRecords.getCallInCity().size();i++) {

            long time = userRecords.getCallInCity().get(i).getEnd().getTime()-userRecords.getCallInCity().get(i).getStart().getTime();

            if(time%(1000*60)==0)

                cost1 += 0.1*(time/(1000*60));

            else

                cost1 += 0.1*(time/(1000*60)+1);

        }

        for(int i=0;i<userRecords.getCallInProvince().size();i++) {

            long time = userRecords.getCallInProvince().get(i).getEnd().getTime()-userRecords.getCallInProvince().get(i).getStart().getTime();

            if(time%(1000*60)==0)

                cost2 += 0.3*(time/(1000*60));

            else

                cost2 += 0.3*(time/(1000*60)+1);

        }

        for(int i=0;i<userRecords.getCallInLand().size();i++) {

            long time = userRecords.getCallInLand().get(i).getEnd().getTime()-userRecords.getCallInLand().get(i).getStart().getTime();

            if(time%(1000*60)==0)

                cost3 += 0.6*(time/(1000*60));

            else

                cost3 += 0.6*(time/(1000*60)+1);

        }

        return cost1+cost2+cost3;

       

    }

    public UserRecord getUserRecords() {

        return userRecords;

    }

    public void setUserRecords(UserRecord ur) {

        userRecords = ur;

    }

    public double getBalance() {

        return balance;

    }

    public ChargeMode getChargeMode() {

        return chargeMode;

    }

    public void setChargeMode(ChargeMode cm) {

        chargeMode = cm;

    }

    public String getNumber() {

        return number;

    }

    public void setNumber(String n) {

        number = n;

    }

 

    @Override

    public int compareTo(User o) {

        return this.getNumber().compareTo(o.getNumber());

    }

}

 

class UserRecord{

    private ArrayList<CallRecord> callInCity = new ArrayList<CallRecord>();

    private ArrayList<CallRecord> callInProvince = new ArrayList<CallRecord>();

    private ArrayList<CallRecord> callInLand = new ArrayList<CallRecord>();

    private ArrayList<CallRecord> answerInCity = new ArrayList<CallRecord>();

   private ArrayList<CallRecord> answerInProvince = new ArrayList<CallRecord>();

    private ArrayList<CallRecord> answerInLand = new ArrayList<CallRecord>();

    private ArrayList<MessageRecord> sendMessage = new ArrayList<MessageRecord>();

    private ArrayList<MessageRecord> receiveMessage = new ArrayList<MessageRecord>();

   

    public void addCallInCity(CallRecord cr) {

        callInCity.add(cr);

    }

    public void addCallInProvince(CallRecord cr) {

        callInProvince.add(cr);

    }

    public void addCallInLand(CallRecord cr) {

        callInLand.add(cr);

    }

    public void addAnswerInCity(CallRecord cr) {

        answerInCity.add(cr);

    }

    public void addAnswerInProvince(CallRecord cr) {

        answerInProvince.add(cr);

    }

    public void addAnswerInLand(CallRecord cr) {

        answerInLand.add(cr);

    }

    public void addSendMessage(MessageRecord mr) {

        sendMessage.add(mr);

    }

    public void addReceiveMessage(MessageRecord mr) {

        receiveMessage.add(mr);

    }

    public ArrayList<CallRecord> getCallInCity() {

        return callInCity;

    }

    public ArrayList<CallRecord> getCallInProvince() {

        return callInProvince;

    }

    public ArrayList<CallRecord> getCallInLand() {

        return callInLand;

    }

    public ArrayList<CallRecord> getAnswerInCity() {

        return answerInCity;

    }

    public ArrayList<CallRecord> getAnswerInProvince() {

        return answerInProvince;

    }

    public ArrayList<CallRecord> getAnswerInLand() {

        return answerInLand;

    }

    public ArrayList<MessageRecord> getSendMessage() {

        return sendMessage;

    }

    public ArrayList<MessageRecord> getReceiveMessage() {

        return receiveMessage;

    }

}

 

abstract class ChargeMode{

    private ArrayList<ChargeRule> chargeRules = new ArrayList<>();

   

    public ArrayList<ChargeRule> getChargeRules(){

        return chargeRules;

    }

    public void setChargeRules(ArrayList<ChargeRule> cr) {

        chargeRules = cr;

    }

    public double calCost(UserRecord ur) {

        return 0;

    }

    public double getMonthlyRent() {

        return 20;

    }

}

 

class LandPhoneCharge extends ChargeMode{

    private double monthlyRent = 20;

   

    @Override

    public double calCost(UserRecord ur) {

        return 0;

    }

    @Override

    public double getMonthlyRent() {

        return monthlyRent;

    }

}

 

abstract class ChargeRule{

   

}

 

abstract class CallChangeRule extends ChargeRule{

    public double calCost(ArrayList<CallRecord> cr) {

        return 0;

    }

}

 

class CityRule extends CallChangeRule{

    @Override

    public double calCost(ArrayList<CallRecord> cr) {

        // TODO Auto-generated method stub

        return super.calCost(cr);

    }

}

 

class ProvinceRule extends CallChangeRule{

    @Override

    public double calCost(ArrayList<CallRecord> cr) {

        // TODO Auto-generated method stub

        return super.calCost(cr);

    }

}

 

class LandRule extends CallChangeRule{

    @Override

    public double calCost(ArrayList<CallRecord> cr) {

        // TODO Auto-generated method stub

        return super.calCost(cr);

    }

}

 

abstract class CommunicationRecord{

    String callNumber;

    String answerNumber;

   

    public String getCallNumber() {

        return callNumber;

    }

    public void setCallNumber(String cn) {

        callNumber = cn;

    }

    public String getAnswerNumber() {

        return answerNumber;

    }

    public void setAnswerNumber(String an) {

        answerNumber = an;

    }

}

 

class CallRecord extends CommunicationRecord{

    private Date start;

    private Date end;

    private String callCode;

    private String answerCode;

   

    public CallRecord(Date start,Date end) {

        this.start = start;

        this.end = end;

    }

   

    public Date getStart() {

        return start;

    }

    public void setStart(Date start) {

        this.start = start;

    }

    public Date getEnd() {

        return end;

    }

    public void setEnd(Date end) {

        this.end = end;

    }

    public String getCallCode() {

        return callCode;

    }

    public void setCallCode(String callCode) {

        this.callCode = callCode;

    }

    public String getAnswerCode() {

        return answerCode;

    }

    public void setAnswerCode(String answerCode) {

        this.answerCode = answerCode;

    }

   

}

 

class MessageRecord extends CommunicationRecord{

    private String message;

 

    public String getMessage() {

        return message;

    }

 

    public void setMessage(String message) {

        this.message = message;

    }

 

}

2.   题目集09

7-1 电信计费系列2-手机+座机计费

本题是在题目集08第一题的基础上进行改进，增加了手机用户。在处理每条有手机用户的通讯记录时，同时需要判断手机用户所在的地区。总而言之，通讯记录的判断和处理更加详细，也更加繁琐了。需要创建手机用户的计费方式，之后在主函数中增加和修改亿点点就可以完成了。因为当时有点懈怠，做的时间比较晚，所以只得了97分，差3分，有点可惜。源码如下（部分）：

public class Main {

 

    public static void main(String[] args) throws ParseException {

        Scanner in = new Scanner(System.in);

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");

        DecimalFormat d = new DecimalFormat("0.0");

        ArrayList<User> Users = new ArrayList<>();

        String[] str = new String[100];

        String[] users = new String[100];

        String[] userRecords = new String[100];

        int c=0,k=0,m=0;

        for(int i=0;;i++) {

            str[i]=in.nextLine();

            c++;

            if(str[i].contains("end"))

                break;

        }

       

        for(int i=0;i<c-1;i++) {

            if(str[i].matches("u-0791[\\d]{7,8} 0")||str[i].matches("u-1[\\d]{10} 1")) {

                boolean exist = false;

                for(int j=0;j<k;j++) {

                   if(users[j].equals(str[i]))

                       exist = true;

                }

                if(!exist) {

                   users[k] = str[i];

                   k++;

                }

            }else if(str[i].matches("t-0(\\d){9,11}\\s0(\\d){9,11}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){

               

                userRecords[m] = str[i];

                m++;

            }else if(str[i].matches("t-1(\\d){10}\\s0(\\d){2,3}\\s(\\d){10,12}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){

               

                userRecords[m] = str[i];

                m++;

            }else if(str[i].matches("t-0(\\d){9,11}\\s1(\\d){10}\\s(\\d){3,4}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){

               

                userRecords[m] = str[i];

                m++;

            }else if(str[i].matches("t-1(\\d){10}\\s0(\\d){2,3}\\s1(\\d){10}\\s0(\\d){2,3}\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d\\s((((1[6-9]|[2-9]\\d)\\d{2}).([13578]|1[02]).([1-9]|[12]\\d|3[01]))|(((1[6-9]|[2-9]\\d)\\d{2}).([13456789]|1[012]).([1-9]|[12]\\d|30))|(((1[6-9]|[2-9]\\d)\\d{2})-2-([1-9]|1\\d|2[0-8]))|(((1[6-9]|[2-9]\\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-2-29-)) (20|21|22|23|[0-1]\\d):[0-5]\\d:[0-5]\\d")){

               

                userRecords[m] = str[i];

                m++;

            }

           

        }

       

        for(int i=0;i<k;i++) {

            Users.add(new User(users[i]));

        }

       

        for(int i=0;i<k;i++) {

            for(int j=0;j<m;j++) {

                String[] sub = userRecords[j].split(" ");

              if(sub[0].substring(2,sub[0].length()).matches(Users.get(i).getNumber())) {

                   if(sub[1].matches("0791[\\d]{7,8}"))

                       Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5]),sub[0],sub[1]));

                   else if(sub[1].matches("((079[\\d])|(0701))[\\d]{7,8}"))

                       Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5]),sub[0],sub[1]));

                   else if(sub[1].matches("0(\\d){9,11}"))

                       Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[2]+" "+sub[3]), sdf.parse(sub[4]+" "+sub[5]),sub[0],sub[1]));

                   else if(sub[2].matches("0791[\\d]{7,8}"))

                       Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0]+" "+sub[1],sub[2]));

                   else if(sub[2].matches("((079[\\d])|(0701))[\\d]{7,8}"))

                       Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0]+" "+sub[1],sub[2]));

                   else if(sub[2].matches("0(\\d){9,11}"))

                       Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0]+" "+sub[1],sub[2]));

                   else if(sub[2].matches("0791")) {

                       Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[1]));

                      

                   }else if(sub[2].matches("(079[\\d])|(0701)")) {

                       Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[1]));

                      

                   }else if(sub[2].matches("0(\\d){2,3}")) {

                       Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[1]));

                   }else if(sub[3].matches("0791")) {

                       Users.get(i).userRecords.addCallInCity(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));

                      

                   }else if(sub[3].matches("(079[\\d])|(0701)")) {

                       Users.get(i).userRecords.addCallInProvince(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));

                      

                   }else if(sub[3].matches("0(\\d){2,3}")) {

                       Users.get(i).userRecords.addCallInLand(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));

                   }

                  

                }else if(sub[1].matches(Users.get(i).getNumber())) {

                   if(sub[0].substring(2,6).matches("0791"))

                           continue;

                   else if(sub[0].substring(2,6).matches("(079[\\d])|(0701)"))

                       continue;

                   else if(sub[0].substring(2,6).matches("0(\\d){3}")) {

                       Users.get(i).userRecords.addAnswerInLand(new CallRecord(sdf.parse(sub[3]+" "+sub[4]), sdf.parse(sub[5]+" "+sub[6]),sub[0],sub[2]));

                   }

                }else if(sub[2].matches(Users.get(i).getNumber())) {

                   if(sub[1].matches("0791"))

                       continue;

                   else if(sub[1].matches("(079[\\d])|(0701)"))

                       continue;

                   else if(sub[1].matches("0(\\d){2,3}")) {

                       Users.get(i).userRecords.addAnswerInLand(new CallRecord(sdf.parse(sub[4]+" "+sub[5]), sdf.parse(sub[6]+" "+sub[7]),sub[0]+" "+sub[1],sub[2]));

                   }

                }

            }

        }

       

       

        Collections.sort(Users);

        for(User e:Users) {

            System.out.println(e.getNumber()+" "+d.format(e.calCost())+" "+d.format(e.calBalance()));

        }

       

    }

 

}

手机用户的计费方式如下：

    class MovePhoneCharge extends ChargeMode{

    private double monthlyRent = 15;

   

    @Override

    public double calCost(UserRecord userRecords) {

        double cost1 = 0,cost2 = 0,cost3 = 0,cost4 = 0;

        double rate1 = 0,rate2 = 0,rate3 = 0;

       

        for(int i=0;i<userRecords.getCallInCity().size();i++) {

            if(userRecords.getCallInCity().get(i).getCallCode().split(" ")[1].matches("0791"))

                rate1 = 0.1;

            else if(userRecords.getCallInCity().get(i).getCallCode().split(" ")[1].matches("(079\\d)|(0710)"))

                rate1 = 0.3;

            else

                rate1 = 0.6;

           

            long time = userRecords.getCallInCity().get(i).getEnd().getTime()-userRecords.getCallInCity().get(i).getStart().getTime();

            if(time%(1000*60)==0)

                cost1 += rate1*(time/(1000*60));

            else

                cost1 += rate1*(time/(1000*60)+1);

        }

        for(int i=0;i<userRecords.getCallInProvince().size();i++) {

            if(userRecords.getCallInProvince().get(i).getCallCode().split(" ")[1].matches("0791"))

                rate2 = 0.2;

            else if(userRecords.getCallInProvince().get(i).getCallCode().split(" ")[1].matches("(079\\d)|(0710)"))

                rate2 = 0.3;

            else

                rate2 = 0.6;

            long time = userRecords.getCallInProvince().get(i).getEnd().getTime()-userRecords.getCallInProvince().get(i).getStart().getTime();

            if(time%(1000*60)==0)

                cost2 += rate2*(time/(1000*60));

            else

                cost2 += rate2*(time/(1000*60)+1);

        }

        for(int i=0;i<userRecords.getCallInLand().size();i++) {

            if(userRecords.getCallInLand().get(i).getCallCode().split(" ")[1].matches("0791"))

                rate3 = 0.3;

            else if(userRecords.getCallInLand().get(i).getCallCode().split(" ")[1].matches("(079\\d)|(0710)"))

                rate3 = 0.3;

            else

                rate3 = 0.6;

            long time = userRecords.getCallInLand().get(i).getEnd().getTime()-userRecords.getCallInLand().get(i).getStart().getTime();

            if(time%(1000*60)==0)

                cost3 += rate3*(time/(1000*60));

            else

                cost3 += rate3*(time/(1000*60)+1);

        }

        for(int i=0;i<userRecords.getAnswerInLand().size();i++) {

            long time = userRecords.getAnswerInLand().get(i).getEnd().getTime()-userRecords.getAnswerInLand().get(i).getStart().getTime();

            if(time%(1000*60)==0)

                cost4 += 0.3*(time/(1000*60));

            else

                cost4 += 0.3*(time/(1000*60)+1);

        }

        return cost1+cost2+cost3+cost4;

    }

    @Override

    public double getMonthlyRent() {

        return monthlyRent;

    }

}

3.   题目集10

7-1 电信计费系列3-短信计费

本题只需要考虑开户信息和短信，在题目集09的基础上进行一些删改就可以完成了。可以说，这次题目集是这三次作业中最轻松的一次了，因为之前都把基础做好了。源码如下：

import java.util.Date;

import java.text.DecimalFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

 

public class Main {

 

   public static void main(String[] args) throws ParseException {

      Scanner in = new Scanner(System.in);

      SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");

      DecimalFormat d = new DecimalFormat("0.0");

      ArrayList<User> Users = new ArrayList<>();

      String[] str = new String[100];

      String[] users = new String[100];

      String[] userRecords = new String[100];

      int c=0,k=0,m=0;

      for(int i=0;;i++) {

          str[i]=in.nextLine();

          c++;

          if(str[i].contains("end"))

              break;

      }

     

      for(int i=0;i<c-1;i++) {

          if(str[i].matches("u-1\\d{10} 3")) {

              boolean exist = false;

              for(int j=0;j<k;j++) {

                  if(users[j].equals(str[i]))

                      exist = true;

              }

              if(!exist) {

                  users[k] = str[i];

                  k++;

              }

          }else if(str[i].matches("m-1\\d{10} 1\\d{10} ([\\d]|[A-Z]|[a-z]| |\\.|\\,)*")) {

              userRecords[m] = str[i];

              m++;

          }

         

      }

     

      for(int i=0;i<k;i++) {

            Users.add(new User(users[i]));

          for(int j=0;j<m;j++) {

              if(userRecords[j].substring(2,13).matches(Users.get(i).getNumber())) {

                  Users.get(i).userRecords.addSendMessage(new MessageRecord(userRecords[j].substring(26)));

              }

          }

      }

     

     

      Collections.sort(Users);

      for(User e:Users) {

          System.out.println(e.getNumber()+" "+d.format(e.calCost())+" "+d.format(e.calBalance()));

      }

     

   }

 

}

 

class User implements Comparable<User>{

   UserRecord userRecords = new UserRecord();

   private double balance = 100;

   private ChargeMode chargeMode;

   private String number;

  

   public User(String str) {

      this.number = str.substring(2,str.length()-2);

      if(str.charAt(str.length()-1) == '3')

          this.setChargeMode(new MovePhoneMessageCharge());

   }

  

   public double calBalance() {

      return balance-chargeMode.getMonthlyRent()-calCost();

   }

   public double calCost() {

      return chargeMode.calCost(userRecords);

     

   }

   public UserRecord getUserRecords() {

      return userRecords;

   }

   public void setUserRecords(UserRecord ur) {

      userRecords = ur;

   }

   public double getBalance() {

      return balance;

   }

   public ChargeMode getChargeMode() {

      return chargeMode;

   }

   public void setChargeMode(ChargeMode cm) {

      chargeMode = cm;

   }

   public String getNumber() {

      return number;

   }

   public void setNumber(String n) {

      number = n;

   }

 

   @Override

   public int compareTo(User o) {

      return this.getNumber().compareTo(o.getNumber());

   }

}

 

class UserRecord{

   private ArrayList<CallRecord> callInCity = new ArrayList<CallRecord>();

   private ArrayList<CallRecord> callInProvince = new ArrayList<CallRecord>();

   private ArrayList<CallRecord> callInLand = new ArrayList<CallRecord>();

   private ArrayList<CallRecord> answerInCity = new ArrayList<CallRecord>();

  private ArrayList<CallRecord> answerInProvince = new ArrayList<CallRecord>();

   private ArrayList<CallRecord> answerInLand = new ArrayList<CallRecord>();

   private ArrayList<MessageRecord> sendMessage = new ArrayList<MessageRecord>();

   private ArrayList<MessageRecord> receiveMessage = new ArrayList<MessageRecord>();

  

   public void addCallInCity(CallRecord cr) {

      callInCity.add(cr);

   }

   public void addCallInProvince(CallRecord cr) {

      callInProvince.add(cr);

   }

   public void addCallInLand(CallRecord cr) {

      callInLand.add(cr);

   }

   public void addAnswerInCity(CallRecord cr) {

      answerInCity.add(cr);

   }

   public void addAnswerInProvince(CallRecord cr) {

      answerInProvince.add(cr);

   }

   public void addAnswerInLand(CallRecord cr) {

      answerInLand.add(cr);

   }

   public void addSendMessage(MessageRecord mr) {

      sendMessage.add(mr);

   }

   public void addReceiveMessage(MessageRecord mr) {

      receiveMessage.add(mr);

   }

   public ArrayList<CallRecord> getCallInCity() {

      return callInCity;

   }

   public ArrayList<CallRecord> getCallInProvince() {

      return callInProvince;

   }

   public ArrayList<CallRecord> getCallInLand() {

      return callInLand;

   }

   public ArrayList<CallRecord> getAnswerInCity() {

      return answerInCity;

   }

   public ArrayList<CallRecord> getAnswerInProvince() {

      return answerInProvince;

   }

   public ArrayList<CallRecord> getAnswerInLand() {

      return answerInLand;

   }

   public ArrayList<MessageRecord> getSendMessage() {

      return sendMessage;

   }

   public ArrayList<MessageRecord> getReceiveMessage() {

      return receiveMessage;

   }

}

 

abstract class ChargeMode{

   private ArrayList<ChargeRule> chargeRules = new ArrayList<>();

  

   public ArrayList<ChargeRule> getChargeRules(){

      return chargeRules;

   }

   public void setChargeRules(ArrayList<ChargeRule> cr) {

      chargeRules = cr;

   }

   public double calCost(UserRecord ur) {

      return 0;

   }

   public double getMonthlyRent() {

      return 20;

   }

}

 

 

class MovePhoneMessageCharge extends ChargeMode{

   private double monthlyRent = 0;

  

   public double calCost(UserRecord userRecords) {

      double cost = 0;

      int ml = 0;

        double cal = 0;

      for(int i=0;i<userRecords.getSendMessage().size();i++) {

          cal = userRecords.getSendMessage().get(i).getMessage().length()/10.0;

            if(cal%1!=0)

                cal = cal+1.0;

          ml += (int)cal;

      }

      if(ml<=3)

          cost = 0.1*ml;

      else if(ml<=5)

          cost = 0.3+0.2*(ml-3);

      else if(ml>5)

          cost = 0.7+0.3*(ml-5);

      return cost;

   }

   @Override

   public double getMonthlyRent() {

      return monthlyRent;

   }

}

 

abstract class ChargeRule{

  

}

 

abstract class CallChangeRule extends ChargeRule{

   public double calCost(ArrayList<CallRecord> cr) {

      return 0;

   }

}

 

class CityRule extends CallChangeRule{

   @Override

   public double calCost(ArrayList<CallRecord> cr) {

      // TODO Auto-generated method stub

      return super.calCost(cr);

   }

}

 

class ProvinceRule extends CallChangeRule{

   @Override

   public double calCost(ArrayList<CallRecord> cr) {

      // TODO Auto-generated method stub

      return super.calCost(cr);

   }

}

 

class LandRule extends CallChangeRule{

   @Override

   public double calCost(ArrayList<CallRecord> cr) {

      // TODO Auto-generated method stub

      return super.calCost(cr);

   }

}

 

abstract class CommunicationRecord{

   String callNumber;

   String answerNumber;

  

   public String getCallNumber() {

      return callNumber;

   }

   public void setCallNumber(String cn) {

      callNumber = cn;

   }

   public String getAnswerNumber() {

      return answerNumber;

   }

   public void setAnswerNumber(String an) {

      answerNumber = an;

   }

}

 

class CallRecord extends CommunicationRecord{

   private Date start;

   private Date end;

   private String callCode;

   private String answerCode;

  

   public CallRecord(Date start,Date end ,String callCode, String answerCode) {

      this.start = start;

      this.end = end;

      this.callCode = callCode;

      this.answerCode = answerCode;

   }

  

   public Date getStart() {

      return start;

   }

   public void setStart(Date start) {

      this.start = start;

   }

   public Date getEnd() {

      return end;

   }

   public void setEnd(Date end) {

      this.end = end;

   }

   public String getCallCode() {

      return callCode;

   }

   public void setCallCode(String callCode) {

      this.callCode = callCode;

   }

   public String getAnswerCode() {

      return answerCode;

   }

   public void setAnswerCode(String answerCode) {

      this.answerCode = answerCode;

   }

  

}

 

class MessageRecord extends CommunicationRecord{

   private String message;

 

   public MessageRecord(String m) {

      message = m;

   }

  

   public String getMessage() {

      return message;

   }

 

}

三、  采坑心得

在完成这3次题目集的过程中，我遇到了一些的问题，下面将对我遇到一些的问题分享一下我的心得：

首先，日期的转化问题。将字符串按格式转化为日期时，需要在转化发生的函数后面

加上throws ParseException，也就是需要抛出异常；其次，用户排序的问题。一开始我使用的是for循环来进行排序，测试用例的输出结果是正确的，但是一直过不了测试点。在和室友的排序方法进行对比后，我发现了问题所在，于是采用了Collections.sort(Users)这种方式来进行排序，顺利地通过了全部测试点。

四、  改进建议

前面说道，我判断通讯记录的正则表达式十分繁琐，这是一个急需改进的地方。SimpleDateFormat类可以对日期进行格式化，可是我对此并没有很了解，应用起来十分困难，希望之后可以熟练应用。

五、  总结

在完成这三次题目集的过程中，我遇到了很多困难，也收获了很多知识点。尽管我总是被难题虐到心累，我还是愿意继续不断的尝试，直到正确。之后，我需要学习和改进的地方还有很多，但是我会尽量使自己变得更优秀。靠自己的努力得到的满分，才是满满的成就感！

 

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