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");}}