学生管理系统

*创建Student类存放学生学号,姓名，年龄，家庭居住地址

package 学生管理系统;

public class Student {
    
    private String num;
    private String name;
    private String age;
    private String id;
    public Student() {
    
    }
 public Student(String num, String name, String age, String id) {
    
        this.num = num;
        this.name =name;
        this.age = age;
        this.id = id;
    }
    public String getNum() {
    
        return num;
    }
    public void setNum(String num) {
    
        this.num = num;
    }
    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 getId() {
    
        return id;
    }
    public void setId(String id) {
    
        this.id = id;
    }
}

//创建studentManagement类对学生信息进行增删改查操作

package 学生管理系统;

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

public class studentManagement {
    
    public static ArrayList<Student>a=new ArrayList<>();
    public static void main(String[] args) {
    
        ArrayList<Student> a = new ArrayList<>();
        while (true) {
    
            System.out.println("--------------欢迎来到学生管理系统----------------");
            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.查看学生");
            System.out.println("5.退出");
            System.out.println("请输入您的选择");
            Scanner in = new Scanner(System.in);
            int s = in.nextInt();
            switch (s) {
    
                case 1:
                    addStudent(a);
                    break;
                case 2:
                    deleteStudent(a);
                    break;
                case 3:
                    removeStudent(a);
                    break;
                case 4:
                    findStudent(a);
                    break;
                case 5:
                    System.out.println("退出");
                    System.exit(0);
            }
        }
    }
    //添加某个学生
    public static void addStudent(ArrayList<Student>a){
    
        Scanner in=new Scanner(System.in);
        System.out.println("请输入学号");
        String num=in.next();
        System.out.println("请输入姓名");
        String name=in.next();
        System.out.println("请输入年龄");
        String age=in.next();
        System.out.println("请输入家庭居住地");
        String id=in.next();
        Student stu=new Student(num,name,age,id);
        a.add(stu);
        System.out.println("添加成功");
    }
    //删除某个学生
    public static void deleteStudent(ArrayList<Student>a){
    
        System.out.println("请输入您要删除的学号");
        Scanner in=new Scanner(System.in);
        String num=in.next();
        for(int i=0;i<a.size();i++){
    
           Student stu= a.get(i);
           if(stu.getNum().equals(num))
           a.remove(i);
        }
        System.out.println("删除成功");
    }
    //修改某个学生信息
    public static void removeStudent(ArrayList<Student>a){
    
        Scanner in=new Scanner(System.in);
        System.out.println("请输入要修改的学生的学号");
        String num=in.next();
        System.out.println("请输入新姓名");
        String name= in.next();
        System.out.println("请重新输入年龄");
        String age= in.next();
        System.out.println("请重新输入家庭居住地");
        String id= in.next();
        Student s=new Student();
        s.setNum(num);
        s.setName(name);
        s.setAge(age);
        s.setId(id);
        for(int i=0;i<a.size();i++){
    
            Student stu= a.get(i);
            if(stu.getNum().equals(num))
                a.set(i,s);
        }
    }
    //查看所有学生信息
    public static void findStudent(ArrayList<Student>a){
    
        System.out.println("学号 姓名 年龄 居住地址");
        for(int i=0;i<a.size();i++) {
    
            Student stu = a.get(i);
            System.out.println(stu.getNum()+" "+stu.getName()+" "+stu.getAge()+" "+stu.getId());
        }

    }
}