一、學生類

首先創建一個學生類，定義學號姓名年齡居住地

public class Student {private String id;private String name;private String age;private String address;//構造函數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、測試類

1、界面實現

在實現類里面寫界面格式，選項以及方法的實現

ArrayList<Student> array = new ArrayList<>();while (true) {System.out.println("-----------歡迎來到學生管理系統----------");System.out.println("1、查詢學生");System.out.println("2、添加學生");System.out.println("3、刪除學生");System.out.println("4、退出");System.out.println("請輸入你的選擇：");Scanner sc=new Scanner(System.in);String choice=sc.nextLine();

2、功能選擇

exit能夠直接關閉java虛擬機

  //選擇switch(choice){case "1":findAllStudent(array);break;case "2":addAllStudent(array);break;case "3":deleteAllStudent(array);break;case "4":System.out.println("謝謝你的使用");System.exit(0);break;default:System.out.println("輸入號碼有誤，請重新輸入");break;}

3、方法實現

查詢方法

public static void findAllStudent(ArrayList<Student> array){if(array.size()==0){System.out.println("無該學生信息，請重新輸入");return;}for(int x=0;x<array.size();x++){Student s=array.get(x);System.out.println("學號："+s.getId()+"\t"+" 姓名："+s.getName()+"\t"+"年齡："+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("請輸入學生學號：");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("您輸入的學號被占用，請重新輸入");}else{break;}}System.out.println("請輸入學生姓名：");String name=sc.next();System.out.println("請輸入學生年齡：");String age=sc.next();System.out.println("請輸入學生居住地：");String address=sc.next();Student s=new Student(id,name,age,address);array.add(s);System.out.println("添加學生成功");}

刪除

 public static void deleteAllStudent(ArrayList<Student>array){Scanner sc=new Scanner(System.in);System.out.println("請輸入您要刪除的學生學號：");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("該學生不存在");}else{array.remove(index);System.out.println("刪除成功");}}