package group7.list;

import java.util.*;

public class Student {
    
    private String sID ;
    private String sName ;
    private String sGender ;
    private int sAge ;
    
    Scanner cin = new Scanner(System.in);
    
    public Student(){};
    
    public Student(String sID, String sName,String gender, int age ){
        this.setsName(sName);
        this.setsGender(gender);
        this.setsAge(age);
    }
    
    public void setsID(String sID) {
        this.sID = sID;
    }

    public String getsID() {
        return sID;
    }

    public void setsName(String sName) {
        this.sName = sName;
    }

    public String getsName() {
        return sName;
    }

    public void setsGender(String sGender) {
        this.sGender = sGender;
    }

    public String getsGender() {
        return sGender;
    }

    public void setsAge(int sAge) {
        this.sAge = sAge;
    }

    public int getsAge() {
        return sAge;
    }
    
    public void addStudent(){
        
        Student s1=new Student();
        System.out.println("请输入学生学号：");
        String ID=cin.nextLine();
        s1.setsID(ID);
        System.out.println("请输入学生姓名：");
        String name=cin.nextLine();
        s1.setsName(name);
        System.out.println("请输入学生性别：");
        String gender=cin.nextLine();
        s1.setsGender(gender);
        System.out.println("请输入学生年龄：");
        int age=cin.nextInt();
        s1.setsAge(age);
        
        StudentList s=new StudentList();
        s.addStudent(s1);
    }
    
    public void deleteStudent(){
        
        System.out.println("请输入需要删除的学生的学号：");
        String deleteID=cin.nextLine();
        int index=Integer.parseInt(deleteID);
        
        StudentList s=new StudentList();
        s.removeStudent(index);
        
    }

}

package group7.list;

import java.util.ArrayList;
import java.util.Iterator;

public class StudentList {
    
    ArrayList<Student> stuList=new ArrayList<Student>();
    
    public StudentList(){}
    
    public StudentList(Student student){
        
        stuList.add(student);
    }
    
    public void addStudent( Student student){
        
        stuList.add(student);    
        
    };
    
    public void removeStudent(int index){
        
        stuList.remove(index);
        
    };
    
    public void showStudents(){
        
        Iterator<Student> it= stuList.iterator();
        
        while(it.hasNext()){
            System.out.println(it.next()+" ");
        }
        
    };

}

package group7.list;

import java.util.*;

public class StudentListTest {

    /**
     * 2、    使用List管理对象集合
         1)    新建一个包group_x.list(x表示所在的组号)
         2)    在这个包中新建三个类：Student类，StudentList类，StudentListTest类。
            Student类主要包括：
 
         3)    完善上面三个类，相关要求参考源代码程序的注释，即根据要求修改源代码程序，给出具体的实现代码。
     *@author 
     * @param args
     */
    
    public static void main(String[] args) {
        
        
        Scanner cin=new Scanner(System.in);
        
        
        Student stu0 = new Student("001","Jack","M",20);
        Student stu1 = new Student("002","Mike","M",20);
        Student stu2 = new Student("003","Lisa","F",20);
        Student stu3 = new Student("004","Linda","F",20);
        Student stu4 = new Student("005","Harry","M",20);
        Student stu5 = new Student("006","Jimmy","M",20);        
            
        StudentList s10=new StudentList(stu0);
        StudentList s11=new StudentList(stu1);
        StudentList s12=new StudentList(stu2);
        StudentList s13=new StudentList(stu3);
        StudentList s14=new StudentList(stu4);
        StudentList s15=new StudentList(stu5);
        
        StudentListTest s= new StudentListTest();
        s.menu();
        
        int choice=cin.nextInt();
        
        switch(choice){        
        case 1 : {
        
            boolean flag=true;
            
            while(flag)
            {
                Student s1=new Student();
                s1.addStudent();
                System.out.println("如果想要继续添加请输入y，否则输入n");
                String c=cin.next();
                if(c=="y") flag=true;
                else flag=false;
                
            }
            
            StudentListTest s5=new StudentListTest();
            s5.menu();
        };
        
        break;
        
        case 2 :{
            
            boolean flag=true;
            
            while(flag){
            Student s1=new Student();
            s1.deleteStudent();
            System.out.println("如果想要继续删除请输入y，否则输入n");
            String c=cin.next();
            if(c=="y") flag=true;
            else flag=false;
            }
            
            StudentListTest s6=new StudentListTest();
            s6.menu();
            
        };
        
        break;
        
        case 3 :{
            
            StudentList s2=new StudentList();
            s2.showStudents();
            
            StudentListTest s7=new StudentListTest();
            s7.menu();
            
        };
        
        break;
        
        case 4 :{
            StudentListTest s8=new StudentListTest();
            s8.menu();
        };
        break;        
        }
    }

    private void menu() {
        
        System.out.println("<<<请选择你需要的操作>>>");
        System.out.println("|   1、添加学生信息        |");
        System.out.println("|   2、删除学生信息        |");
        System.out.println("|   3、显示学生信息        |");
        System.out.println("|   4、退出                            |");
        System.out.println("************************");
        
    }

}