软件工程第五次作业

1.请运行下面code，指出其功能

主要功能：随机产生三个学生的姓，名字和年龄。

 

 

2、请将该code进行代码重构，使之模块化，并易于阅读和维护；

import java.util.ArrayList;

import java.util.List;

import java.util.Random;

 

 

public class Driver {

 

    private static String[] lastNames = {"Doe", "Smith", "Jones", "Adams", "Marshall", "Thompson", "Bradley", "Brown", "White", "Franklin", "Davis", "Cohn", "Clark"};

    private static String[] firstNames = {"Mary", "John", "Susan", "Michael", "David", "Lisa", "Wendy", "Diane", "Kelly", "Claire", "Elizabeth", "Mitchell", "Richard"};

 

    public static void main(String[] args) {

         

        // create an empty list

        List<Student> studentList = new ArrayList<Student>();

 

        // initialize random generator

        Random random = new Random();

         

        generatestudent(studentList, random);

         

        systemstudent(studentList);

 

   }

 

    private static void systemstudent(List<Student> studentList) {

        //print out the students

        for (Student temp : studentList) {

            System.out.println(temp);

             

        }

    }

 

    private static void generatestudent(List<Student> studentList, Random random) {

        // create random number of students

        for (int i=0; i < 3; i++) {

 

            // get random first name

            String tempFirstName = firstNames[random.nextInt(firstNames.length)];

             

            // get random last name

            String tempLastName = lastNames[random.nextInt(lastNames.length)];

             

            // get random age

            int age = 18 + random.nextInt(20);

 

            // create student

            Student tempStudent = new Student(tempLastName, tempFirstName, age);

             

            // add them to the list

            studentList.add(tempStudent);

        }

    }

 

}

3.

这个视频主要就是一个需求分析，即通过与用户交流，获取信息。第一点，从开人员与用户的交流上来看，用户对自己的需求表达不清楚，没有明确自己想要的产品是什么和想要什么效果，以及开发者也没有明确获取用户提供的信 息。第二，从开发人员对用户的需求分析来看，用户提出的要求不可能完成，而负责开发的公司却接受了任务，觉得工程师就是专家，用户的需求就一定能完成，这 是不合理的。这样会导致最后开发结果根本就不是用户所”期望“的结果。