java---学生信息管理程序

第一类：测试类

import java.util.Scanner;
import java.util.ArrayList;

public class StudentText {
	public static void main(String[] args) {
		ArrayList array=new ArrayList(); 
	
		//主页面
		while(true) {
		System.out.println("Welcome to menu");
		System.out.println("1.添加学生");
		System.out.println("2.删除学生");
		System.out.println("3.修改学生");
		System.out.println("4.查看所有学生");
		System.out.println("5.退出");
		System.out.println("Please choice which function you want");
		Scanner input=new Scanner(System.in);
		int choice=input.nextInt();
		
		
		switch(choice) {
		case 1:
			System.out.println("1.添加学生");
			addStudent(array);
			break;
		case 2:	
			System.out.println("2.删除学生");
			deleteStudent(array);
			break;
		case 3:
			System.out.println("3.修改学生");
			fixStudent(array);
			break;
		case 4:
			System.out.println("4.查看所有学生");
			findStudent(array);
			break;
		case 5:
			System.out.println("thank you for using");
			System.exit(0);//结束标志
		}
		}
	}
	//创建方法，录入数据
	public static void addStudent(ArrayList array) {
	//录入学生数据
			Scanner sc=new Scanner(System.in);
			System.out.println("Please enter name:");
			String name=sc.next();
			System.out.println("Please enter age:");
			int age=sc.nextInt();
			System.out.println("Please enter ID:");
			String ID=sc.next();
			Student s=new Student();
			s.setAge(age);
			s.setName(name);
			s.setID(ID);
			//向集合中添加数据
			array.add(s);
			System.out.println("添加成功");
	}
	
	public static void findStudent(ArrayList array) {
		for(int i=0;i array) {
		//通过遍历集合，比较学号是否相等，从而删除元素
		System.out.println("输入删除学生的学号");
		Scanner sc=new Scanner(System.in);
		String sid=sc.next();
		for(int i=0;i array) {
    	System.out.println("请输入要修改的学生学号");
    	Scanner sc=new Scanner(System.in);
    	String sid=sc.next();
    	System.out.println("Please enter name:");
		String name=sc.next();
		System.out.println("Please enter age:");
		int age=sc.nextInt();
		System.out.println("Please enter ID:");
		String ID=sc.next();
		Student s=new Student();
		s.setAge(age);
		s.setName(name);
		s.setID(ID);
		for(int i=0;i

第二类：学生类

public class Student {
//private 关键字使定义的类型只能在内部进行访问，而外部无法访问
//针对该关键字，提供了get/set 方法，进行数据的输出和输入
	private int age;
	private String name;
	private String ID;
      public Student() {}//无参构造
      public Student(int age,String name) {
    	  this.age=age;
    	  this.name=name;
      }//含参构造
      public void setAge(int age) {
    	  this.age=age;
      }
      public int getAge() {
    	  return age;
      }
      public void setName(String name) {
    	  this.name=name;
      }
      
      public String getName() {
    	  return name;
      }
      public void setID(String ID) {
    	  this.ID=ID;
      }
      
      public String getID() {
    	  return ID;
      }
}