一、学生类

首先创建一个学生类，定义学号姓名年龄居住地

public class Student {private String id;private String name;private String age;private String address;//构造函数public Student(String id, String name, String age, String address) {this.id = id;this.name = name;this.age = age;this.address = address;}public String getId() {return id;}public void setId(String id) {  this.id = id;}public String getName() { return name; }public void setName(String name) {  this.name = name; }public String getAge() {return age;  }public void setAge(String age) {   this.age = age;}public String getAddress() {return address;}public void setAddress(String address) { this.address = address;   }

二、测试类

1、界面实现

在实现类里面写界面格式，选项以及方法的实现

ArrayList<Student> array = new ArrayList<>();while (true) {System.out.println("-----------欢迎来到学生管理系统----------");System.out.println("1、查询学生");System.out.println("2、添加学生");System.out.println("3、删除学生");System.out.println("4、退出");System.out.println("请输入你的选择：");Scanner sc=new Scanner(System.in);String choice=sc.nextLine();

2、功能选择

exit能够直接关闭java虚拟机

  //选择switch(choice){case "1":findAllStudent(array);break;case "2":addAllStudent(array);break;case "3":deleteAllStudent(array);break;case "4":System.out.println("谢谢你的使用");System.exit(0);break;default:System.out.println("输入号码有误，请重新输入");break;}

3、方法实现

查询方法

public static void findAllStudent(ArrayList<Student> array){if(array.size()==0){System.out.println("无该学生信息，请重新输入");return;}for(int x=0;x<array.size();x++){Student s=array.get(x);System.out.println("学号："+s.getId()+"\t"+" 姓名："+s.getName()+"\t"+"年龄："+s.getAge()+"\t"+" 居住地："+s.getAddress());}}

添加

 public static void addAllStudent(ArrayList<Student>array){Scanner sc=new Scanner(System.in);String id;while(true){System.out.println("请输入学生学号：");id=sc.next();boolean flag=false;for(int x=0;x<array.size();x++){Student s=array.get(x);if(s.getId().equals(id)){flag=true;break;}}if(flag){System.out.println("您输入的学号被占用，请重新输入");}else{break;}}System.out.println("请输入学生姓名：");String name=sc.next();System.out.println("请输入学生年龄：");String age=sc.next();System.out.println("请输入学生居住地：");String address=sc.next();Student s=new Student(id,name,age,address);array.add(s);System.out.println("添加学生成功");}

删除

 public static void deleteAllStudent(ArrayList<Student>array){Scanner sc=new Scanner(System.in);System.out.println("请输入您要删除的学生学号：");String id=sc.nextLine();int index=-1;for(int x=0;x< array.size();x++){Student s=array.get(x);if(s.getId().equals(id)){index=x;break;}}if(index==-1){System.out.println("该学生不存在");}else{array.remove(index);System.out.println("删除成功");}}