为什么订房后，状态更改不了，酒店管理程序

Question

package other;

import java.util.Scanner;

public class HosMas {
    
    Room r1 = new Room(1,"标准",true);
    Room r2 = new Room(2,"标准",true);
    Room r3 = new Room(3,"标准",true);
    Room r4 = new Room(4,"豪华",true);
    Room r5 = new Room(5,"豪华",true);
    Room r6 = new Room(6,"豪华",true);
    
    
    Room[][] room = {{r1,r2,r3},{r4,r5,r6}};
    
    
    
    
    public void m1() {
        HosMas hm1 = new HosMas();
        System.out.println("订房请输入1，退房请输入2，查询某个房间状态请输入3，查询所有房间状态请输入4");
        Scanner sc = new Scanner(System.in);
        int i = sc.nextInt();
        if(i == 1) {           //调用订房方法
            System.out.print("请输入要订的房间号:");
            Scanner sc1 = new Scanner(System.in);
            int id1 = sc1.nextInt();
            hm1.m2(id1);
            hm1.m1();
        }else if(i == 2) {     //调用退房方法
            System.out.print("请输入退订的房间号:");
            Scanner sc2 = new Scanner(System.in);
            int id2 = sc2.nextInt();
            hm1.m3(id2);
            hm1.m1();
        }else if(i == 3) {     //调用查询方法
            System.out.print("请输入要查询的房间号:");
            Scanner sc3 = new Scanner(System.in);
            int id3 = sc3.nextInt();
            hm1.select(id3);
            hm1.m1();
        }else if(i == 4) {     //调用查询所有方法
            hm1.selectAll();
            hm1.m1();
        }else {
            System.out.println("您输入的指令不正确，请重新输入！");
            hm1.m1();
        }
    }

    

    public static void main(String[] args) {
        
        HosMas hm = new HosMas();
        hm.m1();
        
    }
    public void select(int id) {        // 查询某个房间的状态
        
        for(int i = 0;i<room.length;i++) {
            for(int j = 0;j<room[i].length;j++) {
                if(id == room[i][j].id) {
                    System.out.println("房间号为"+id+"的信息如下");
                    System.out.println(room[i][j].id+room[i][j].type+room[i][j].state);
                    break;
                }
            }
        }
        
    }
    public void selectAll() {           // 查询所有房间的状态
        for(int i = 0;i<room.length;i++) {
            for(int j = 0;j<room[i].length;j++) {
                System.out.println(room[i][j].id+"   "+room[i][j].type+"   "+room[i][j].state);
            }
        }
    }
    public void m2(int id) {        //订房
        for(int i = 0;i<room.length;i++) {
            for(int j = 0;j<room[i].length;j++) {
                if(id == room[i][j].id) {
                    room[i][j].state = false;
                    System.out.println("您已成功订购房间号为"+id+"房间");
                    break;
                }
            }
        }
    }
    public void m3(int id) {        //退房
        for(int i = 0;i<room.length;i++) {
            for(int j = 0;j<room[i].length;j++) {
                if(id == room[i][j].id) {
                    if(room[i][j].state = true) {
                        System.out.println("此房间未被预定");
                        break;
                    }else {
                        System.out.println("您已成功退订房间号为"+id+"房间");
                        break;
                    }
                }
            }
        }
    }
}


控制台信息：
订房请输入1，退房请输入2，查询某个房间状态请输入3，查询所有房间状态请输入4
1
请输入要订的房间号:4
您已成功订购房间号为4房间
订房请输入1，退房请输入2，查询某个房间状态请输入3，查询所有房间状态请输入4
4
1   标准   true
2   标准   true
3   标准   true
4   豪华   true
5   豪华   true
6   豪华   true
订房请输入1，退房请输入2，查询某个房间状态请输入3，查询所有房间状态请输入4

Answer 1

因为你每次调用m1方法 都新建了HosMas的实例，里面的状态都是最开始定义的