Mini 学生管理器

package Mini_xueshenguanliqi;

public class Student {
    private int age;
    private String name;

    public Student() {

    }

    public Student(String name) {

    }

    public Student(int age) {
    }

    public Student(String name, int age) {
        this.name=name;
        this.age=age;
    }

//返回年龄值
    public int getAge() {
        return age;
    }

//设置年龄
    public void setAge(int age) {
        if (age > 0) {
            this.age = age;
        } else {
            System.out.println("年龄不合法");
            this.age = 0;
        }

    }

//返回名字
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

//重写toString() 方法
    public String toString() {
        return name + "	----	" + age;
    }

}

package Mini_xueshenguanliqi;

import java.util.Scanner;

public class Client {
    Student arr[] = new Student[5];

    public void initial() {
        Student stu1 = new Student("张三", 15);
        Student stu2 = new Student("李四", 14);
        Student stu3 = new Student("王五", 19);
        arr[0] = stu1;
        arr[1] = stu2;
        arr[2] = stu3;
        
        
        

    }

    public void start() {
        initial();
        
//        调用初始化的信息；
        /**
         * 查看学生系信息
         */
        String a;
        do {
        System.out.println("欢迎进入学生管理器");
        System.out.println("1,查看学生信息");
        System.out.println("2,增加学生信息");
        System.out.println("3,修改学生信息");
        System.out.println("4,删除学生信息");
        System.out.println("请选择您的操作：");
        Scanner sc = new Scanner(System.in);
        int chose = sc.nextInt();
        
        
            switch (chose) {
            case 1:
                showstu();
//            调用函数；
                break;
            case 2:
                addstu();

                break;
            case 3:
                revisestu();
                break;
            case 4:
                deletestu();
                break;

            default:
                break;
            }
            System.out.println("是否继续，y/n");
             a=sc.next();
        } while (a.equals("y"));

    }

    /**
     * 输出学生信息
     */
    public void showstu() {
        System.out.println("现在的学生有:");
        System.out.println("姓名" + "	" + "---" + "	" + "年龄");

        for (int i = 0; i < arr.length; i++) {
            if (arr[i] != null) {
                System.out.println(arr[i]);
            }
        }
    }

    /**
     * 增加学生信息
     */
    public void addstu() {
        Scanner sc = new Scanner(System.in);
        String a;
        do {
            for (int i = 0; i < arr.length; i++) {
            if (arr[i] == null) {
                System.out.println("请输入新增学生姓名：");
                String name = sc.next();
                System.out.println("请输入新增学生年龄：");
                int age = sc.nextInt();
                arr[i] = new Student(name, age);
                System.out.println("增加成功");
                break;
            }
        }
            System.out.println("是否继续添加学生，y/n");
            a=sc.next();
        } while (a.equals("y"));
        

    }

    /**
     * 修改学生信息
     */
    public void revisestu() {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入您要修改的学生姓名：");
        String name = sc.next();
        for (int i = 0; i < arr.length; i++) {
            if (arr[i].getName().equals(name)) {
                System.out.println("请输入修改后的姓名");
                String name1 = sc.next();
                System.out.println("请输入修改后的年龄");
                int age = sc.nextInt();
                arr[i] = new Student(name1, age);
                System.out.println("修改成功");
                break;
//                System.out.println("你要修改1,姓名2,年龄");
//                int chose=sc.nextInt();
//                switch (chose) {
//                case 1:
//                    System.out.println("请输入修改后的姓名");
//                    String name1=sc.next();
//                    
//                    break;
//                case 2:
//                    System.out.println("请输入修改后的年龄");
//                    int age=sc.nextInt();
//                default:
//                    break;
//                }
            }
        }
    }

    public void deletestu() {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入您要删除的学生姓名：");
        String name = sc.next();
        for (int i = 0; i < arr.length; i++) {
            if (arr[i].getName().equals(name)) {

                arr[i] = null;
                break;
            }
        }
    }

}

package Mini_xueshenguanliqi;


public class Text01 {
    public static void main(String[] args) {
        Client c=new Client();
        Student arr[] = new Student[5];
        c.start();
    }
}