面向对象 对键盘输入的值做判断 不允许学生id重复

类

package com.fqs.demo1;

public class Student {
    private String id;
    private String name;
    private int age;
    //无参数
    public Student(){
        
    }
    //全部参数
    public Student(String id,String name,int age){
        this.id=id;
        this.name=name;
        this.age=age;
        
    }
    //set
    public  void setId(String id) {
        
        this.id=id;
    }
    
    //get
    public String getId() {
        return id;
    }
    //set
    public void setName(String name) {
        this.name=name;
        
    }
    //get
    public String getName() {
        return name;
    }
    //set
    public void setAge(int age) {
        this.age=age;
    }
    //get
    public int getAge() {
        return age;
    }

}

对象

package com.fqs.demo1;

import java.util.Scanner;

public class StudentTest {
    public static void main(String[]args) {
        //1.定义数组arr
        Student []arr=new Student[3];
        //2.给数组赋值
        Student s1=new Student("stu001","fqs",36);
        Student s2=new Student();
        //3.放入数组
        arr[0]=s1;
        arr[1]=s2;
        //4.键盘输入s2
        Scanner sc=new Scanner(System.in);
        //提示输入学生id
        System.out.println("请输入学生id:");
        String id=sc.next();
        
        //判断id和s1中的id 重复吗
        while(s1.getId().equals(id)) {
            //提示输入学生id
            
            System.out.println("请再次输入学生id");
             id=sc.next();
        }
        while(!s1.getId().equals(id)){
            System.out.println("-------");
            s2.setId(id);
            break;
        }
        //提示输入学生名字
        System.out.println("请输入学生名字");
        String name=sc.next();
        s2.setName(name);
        //提示输入学生年龄
        System.out.println("请输入学生年龄");
        int age=sc.nextInt();
        s2.setAge(age);
        //判断id是否和已存在的重复
        //输出s2
        System.out.println(s2.getId()+" "+s2.getName()+" "+s2.getAge());
        
    }

}