Question

当我在使用get（key）之后将不同的键放入hashmap时，不同的键显示相同的结果，我不知道为什么会发生这种情况

我有两个类，Room类和Office类

这是我的Room Class

import java.util.HashMap;
import java.util.Scanner;

public class Room {
private static int roomNumber;
private static String description;

public int getRoomNum(){return roomNumber;}
public String getDescription(){return description;}
public void setDescription(String description){
    this.description=description;
}
public void setRoomNum(int roomNumber){
    this.roomNumber=roomNumber;
}

public Scanner sc = new Scanner(System.in);
public static HashMap<Integer, Room> room = new HashMap<>();

public void askData(){
    System.out.println("ENTER ROOM NUMBER:");
    this.roomNumber=sc.nextInt(); 
    sc.nextLine();
    System.out.println("Enter description:");
    this.description = sc.nextLine();
}
public String toString(){
    return this.getRoomNum()+": "+this.getDescription();
}
public static void main(String[] args) {
Room r = new Office();
    r.room.put(1,new Office(1,"java","asdfw"));
r.room.put(2,new Office(2,"jafasdfva","ghasdfasow"));

// ----------------------我的问题在这里

    Room s = r.room.get(1);
    Room s2 = r.room.get(2);
    System.out.println(s.getRoomNum()+" . "+s.getDescription());
    System.out.println(s2.getRoomNum()+" . "+s2.getDescription());

 for(Integer keey: room.keySet()){
    System.out.println(r.room.get(roomNumber));

 }

}

//以下是结果

// 2。 jafasdfva

// 2：jafasdfva。 ghasdfasow

// -------------------------------

}
}

我有int键1和2，但是当我得到键1和2时，结果将显示键2两次，我不知道为什么会发生这种情况

// ------------------------------------

这是我的Office课程

import java.util.ArrayList;
import java.util.HashMap;

public class Office extends Room {
private String staffMembers;

public String enter,check;

public Office(int roomNumber,String description, String staffMembers){
    this.setRoomNum(roomNumber);
    this.setDescription(description);
    this.staffMembers=staffMembers;
}

public Office(){}
public void askData(){
    super.askData();
    StringBuilder sb = new StringBuilder();

    do{
        System.out.println("Enter members in this room: ");
        enter =sc.nextLine();
        sb.append(enter+", ");

        System.out.println("Enter Y to continule.");
        check = sc.nextLine();
    }while(check.equalsIgnoreCase("Y"));

    this.staffMembers=sb+"";

    this.room.put(this.getRoomNum(), new Office(this.getRoomNum(),this.getDescription(),staffMembers));

}

public String toString(){

    return this.getRoomNum()+": "+this.getDescription()+". "+
    this.staffMembers; 
}

}

（OOP hashmap）当我使用get（key）后将不同的键放入hashmap时，不同的键显示相同的结果

0 个答案: