复利计算--结对项目

结对项目:复利计算

搭档:30蔡京航  http://www.cnblogs.com/cjh123/

 github:https://github.com/alfredzhu/teamwork

工作照

一、项目需求:

     即要追求利益,又要面对不可预知的金融投资风险, “不能把鸡蛋放在同一个篮子里”,所以有必要进行组合投资。

     通过上述计算与对比,可以帮助客户进行投资决策。 

     客户:那么能否帮我记录下一笔一笔不同类型的投资,并动态显示资金现值呢?

 

二、完成要求:以结对方式完成。

在这次结对编程中分配任务  我:设计代码并审核,单元测试减少bug

                                    蔡京航:设计界面,查阅资料,令代码规范并美观

在这这次结对编程的收获到和感悟:结对后,两个人都有不同的想法,在设计的时候可以及时提出质疑并觉得怎样做比较好

                                            并指出错误,因此能互相受益,感觉很不错,能提高质量。

 

三、估算时间

估计用时:1.5h

估计代码行:300

实际用时:2.5h

实际代码行:304

 

四、用txt文件来动态显示历史信息

 

  1 import java.io.BufferedWriter;
  2 import java.io.File;
  3 import java.io.FileNotFoundException;
  4 import java.io.FileReader;
  5 import java.io.FileWriter;
  6 import java.io.IOException;
  7 import java.io.Writer;
  8 import java.util.ArrayList;
  9 
 10 
 11 public class txtIO { 
 12 
 13 public static void main (String args[]) { 
 14 
 15 ReadDate(); 
 16 
 17 WriteDate(); 
 18 
 19 } 
 20 
 21 /** 
 22 * 读取数据 
 23  * @return 
 24 */ 
 25 public static void ReadDate() { 
 26     CompoundCalculator C=new CompoundCalculator();
 27 String url = "F:/gitfile/testgit/historydata.txt"; 
 28 try { 
 29 FileReader read = new FileReader(new File(url)); 
 30 StringBuffer sb = new StringBuffer(); 
 31 char ch[] = new char[1024]; 
 32 int d = read.read(ch); 
 33 while(d!=-1){ 
 34 String str = new String(ch,0,d); 
 35 sb.append(str); 
 36 d = read.read(ch); 
 37 } 
 38 C.jTextArea1.setText(sb.toString());
 39 System.out.print(sb.toString()); 
 40 } catch (FileNotFoundException e) { 
 41 e.printStackTrace(); 
 42 } catch (IOException e) { 
 43 e.printStackTrace(); 
 44 }
 45 } 
 46 
 47 /** 
 48 * 写入数据 
 49 */ 
 50 public static void WriteDate() { 
 51 
 52 try{ 
 53 File file = new File("F:/gitfile/testgit/historydata.txt"); 
 54 Writer out = null ;
 55 out = new FileWriter(file,true) ;
 56 if (file.exists()) { 
 57 
 58 file.delete(); 
 59 } 
 60 CompoundCalculator C=new CompoundCalculator();
 61 double P=C.P, i=C.i, F=C.F;//F:复利终值 P:本金 i:利率
 62 int N=C.N, M=C.M, m=C.m;//N:利率获取时间的整数倍 M:复利次数 m:月数
 63 int result=C.result;
 64 int action=C.action;
 65 file.createNewFile(); 
 66 
 67 
 68 if(action==1){
 69     out.write("\r\n"+"复利"+"\r\n");
 70     out.write("本金:" + P + "\r\n" + "年利率(%):" + i + "\r\n"
 71             + "存入年限:" + N + "\r\n" + "年复利次数:" + M + "\r\n" + "复利终值:" + F
 72             + "\r\n"); 
 73 }
 74 if(action==2){
 75     out.write("\r\n"+"单利"+"\r\n");
 76     out.write("本金:" + P + "\r\n" + "年利率(%):" + i + "\r\n"
 77             + "存入年限:" + N + "\r\n" + "复利终值:" + F + "\r\n"); 
 78 }
 79 if(action==3){
 80     out.write("\r\n"+"本金估算"+"\r\n");
 81     out.write("复利终值:" + F + "\r\n" + "年利率(%):" + i + "\r\n"
 82             + "存入年限:" + N + "\r\n" + "年复利次数:" + M + "\r\n" + "本金:" + P
 83             + "\r\n"); 
 84 }
 85 if(action==4){
 86     out.write("\r\n"+"年限估算"+"\r\n");
 87     out.write("本金:" + P + "\r\n" + "年利率(%):" + i + "\r\n"
 88             + "年复利次数:" + M + "\r\n" + "复利终值:" + F + "\r\n" + "年限:" + N
 89             + "\r\n"); 
 90 }
 91 if(action==5){
 92     out.write("\r\n"+"利率估算"+"\r\n");
 93     out.write("本金:" + P + "\r\n" + "存入年限:" + N + "\r\n" + "年复利次数:"
 94             + M + "\r\n" + "复利终值:" + F + "\r\n" + "年利率(%):" + i + "\r\n"); 
 95 }
 96 if(action==6){
 97     out.write("\r\n"+"定期投资(年)"+"\r\n");
 98     out.write("年投资金额:" + P + "\r\n" + "年利率(%):" + i + "\r\n"
 99             + "定投年数:" + N + "\r\n" + "终值:" + F + "\r\n"); 
100 }
101 if(action==7){
102     out.write("\r\n"+"定期投资(月)"+"\n");
103     out.write("月投资金额:" + P + "\r\n" + "年利率(%):" + i + "\r\n"
104             + "定投月数:" + m + "\r\n" + "终值:" + F + "\r\n"); 
105 }
106 if(action==8){
107     out.write("\r\n"+"等额本息还款"+"\r\n");
108     out.write("贷款金额:" + P + "\r\n" + "年利率(%):" + i + "\r\n"
109             + "年限:" + N + "\r\n" + "年复利次数:" + M + "\r\n" + "等额本息还款额:" + F
110             + "\r\n"); 
111 }
112 //} 
113 out.close(); 
114 } catch (Exception ex) { 
115 System.out.println(ex); 
116 } 
117 
118 } 
119 
120 }

 

五、运行效果

 

posted @ 2016-04-06 21:16  32朱杰  阅读(177)  评论(0编辑  收藏  举报