第5节学生管理系统

项目演示

　　主界面

　　

 

 　　 1、学号-姓名-年龄-居住地

思路：

定义学生类

学生类：Student

成员变量： 学号：sid 姓名：name 年龄：age 居住地：address

构造方法：无参构造 带四个参数的构造

成员变量：每个成员变量对应给出get/set方法

package com.itheima_03;

public class Student {
    private String name;//姓名
    private String age;//年龄
    private String number;//学号
    private String address;//地址

    public Student(){}

    public Student(String number,String name,String age,String address){
        this.number=number;
        this.name=name;
        this.age=age;
        this.address=address;
    }

    public void setName(String name){
        this.name=name;
    }
    public String getName(){
        return name;
    }

    public void setAge(String age){
        this.age=age;
    }
    public String getAge(){
        return age;
    }

    public void setNumber(String number){
        this.number=number;
    }
    public String getNumber(){
        return number;
    }

    public void setAddress(String address){
        this.address=address;
    }
    public String getAddress(){
        return address;
    }

}

package com.itheima_03;

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

public class ArrayListDemo01 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        ArrayList<Student> array = new ArrayList<>();
        Student s;
        Student student;
        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、查看所有学生");
            System.out.println("5、退出");
            System.out.println("请输入你的选择:");
            String line = sc.nextLine();
            switch (line) {
                case "1":
                    System.out.println("请输入学号：");
                    String number = sc.nextLine();
                    System.out.println("请输入姓名：");
                    String name = sc.nextLine();
                    System.out.println("请输入年龄：");
                    String age = sc.nextLine();
                    System.out.println("请输入地址：");
                    String address = sc.nextLine();
                    s = new Student(number, name, age, address);
                    array.add(s);
                    break;

                case "2":
                    System.out.println("请输入删除学生的学号：");
                    String lineNumber = sc.nextLine();
                    for (int i = 0; i < array.size(); i++) {
                        Student s2 = array.get(i);
                        if (lineNumber.equals(s2.getNumber())) {
                            array.remove(i);
                            System.out.println("删除成功");
                            break;
                        }
                    }
                    break;

                case "3":
                    System.out.println("请输入修改学生的学号：");
                    String lineNumber2 = sc.nextLine();
                    for (int i = 0; i < array.size(); i++) {
                        Student s2 = array.get(i);
                        if (lineNumber2.equals(s2.getNumber())) {
                            System.out.println("修改学号：");
                            String line1 = sc.nextLine();
                            System.out.println("修改姓名：");
                            String line2 = sc.nextLine();
                            System.out.println("修改年龄：");
                            String line3 = sc.nextLine();
                            System.out.println("修改地址：");
                            String line4 = sc.nextLine();
                            Student s3 = new Student(line1, line2, line3, line4);
                            array.set(i, s3);
                            System.out.println("需改成功");
                            break;
                        }
                    }

                    break;

                case "4":
                    for (int i = 0; i < array.size(); i++) {
                        student = array.get(i);
                        System.out.println(student.getNumber() + "\t" + student.getName() + "\t" + student.getAge() + "\t" + student.getAddress());
                    }
                    break;
                case "5":
                    System.exit(0);
                    break;
            }
        }
    }
}