第五次作业

题目:

    1、请运行下面code,指出其功能;(需附运行结果截图,并用简短文字描述其功能)

    2、请将该code进行代码重构,使之模块化,并易于阅读和维护;

    3、观看视频The Expert (Short Comedy Sketch),写出观后感(内容是什么,说明了什么问题,有什么启示),提交到博客!

    4、学习在项目中使用 jar 文件:

     (1)在下列code中导入jar文件“commons-lang3-3.3.2.jar”,并运行,将运行结果截图提交到博客:

 

答题:

 1、请运行下面code,指出其功能;(需附运行结果截图,并用简短文字描述其功能)

功能:第一个是姓氏, 第二个是名,随机生成一个姓氏和一个名,
         组成一个人的名字以及随机生成一个的年龄。

 

2、请将该code进行代码重构,使之模块化,并易于阅读和维护;

  printDetails(studentList, random);

 1 import java.util.ArrayList;
 2 import java.util.List;
 3 import java.util.Random;
 4 
 5 
 6 public class driver {
 7 
 8     private static String[] lastNames = {"Doe", "Smith", "Jones", "Adams", "Marshall", "Thompson", "Bradley", "Brown", "White", "Franklin", "Davis", "Cohn", "Clark"};
 9     private static String[] firstNames = {"Mary", "John", "Susan", "Michael", "David", "Lisa", "Wendy", "Diane", "Kelly", "Claire", "Elizabeth", "Mitchell", "Richard"};
10 
11     public static void main(String[] args) {
12         
13         // create an empty list
14          List<Student> studentList = new ArrayList<Student>();
15 
16         // initialize random generator
17         Random random = new Random();
18         
19         // create random number of students
20         printDetails(studentList, random);
21 
22    }
23 
24     public static void printDetails(List<Student> studentList, Random random) {
25         for (int i=0; i < 3; i++) {
26 
27             // get random first name
28             String tempFirstName = firstNames[random.nextInt(firstNames.length)];
29             
30             // get random last name
31             String tempLastName = lastNames[random.nextInt(lastNames.length)];
32             
33             // get random age
34             int age = 18 + random.nextInt(20);
35 
36             // create student
37             Student tempStudent = new Student(tempLastName, tempFirstName, age);
38             
39             // add them to the list
40             studentList.add(tempStudent);
41         }
42         
43         
44     //print out the students
45     driver(studentList);
46     }
47 
48     private static void driver(List<Student> studentList) {
49         for (Student temp : studentList) {
50             System.out.println(temp);
51             
52         }
53     }
54 
55 }

 

  3、观看视频The Expert (Short Comedy Sketch),写出观后感(内容是什么,说明了什么问题,有什么启示),提交到博客! 

    答:    这个视频讲的是  :首先画七根红线,有的用绿色墨水画,有的用透明墨水画,这七根线

要两两垂直。其次;大家在分享专家的意见,在交流解决尽量满足用户的需求问题,

 

  4、学习在项目中使用 jar 文件:

     (1)在下列code中导入jar文件“commons-lang3-3.3.2.jar”,并运行,将运行结果截图提交到博客:

 

导入jar文件“commons-lang3-3.3.2.jar”:

 

 

 

 将运行结果:

导入jar文件“后的代码:

 

 1  import org.apache.commons.lang3.time.StopWatch;
 2  
 3  public class Drivers {
 4   
 5       public static void main(String[] args) {
 6          // TODO Auto-generated method stub
 7          System.out.println("Running...");         
 8          StopWatch myStopWatch = new StopWatch();
 9         
10        myStopWatch.start();
11          
12          performLengthyProcess();
13         
14          myStopWatch.stop();
15          
16          System.out.println("Time is:" + myStopWatch.getTime() + " millis");
17          
18          System.out.println("Finished...");
19  
20     }
21      
22     private static void performLengthyProcess(){
23          try{
24              Thread.sleep(3000); //3 second delay
25              
26         }catch(InterruptedException e) {
27              e.printStackTrace();
28          }
29      }
30  
31  }

 

posted @ 2015-05-27 19:09  寿克霞  阅读(120)  评论(0编辑  收藏  举报