• 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  }
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  • 原文地址:https://www.cnblogs.com/shoukexia/p/4534204.html
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