Java利用for loop动态创建若干房间构成的地图

在动态创建地图时遇到问题。当前项目下有主程序以及location类。location类由String变量name以及四个分别代表东西南北四个方向的Location变量构成。主程序下的方法中接纳一个int作为房间数量，通过random.nextInt方法取得一个随机值，分别对应将新创建的Location对象赋给当前Location的四个方向之一并将新Location作为当前Location。如果该方向已有Location，则跳过循环。输出显示当该方向已有Location时仍进行赋值而非跳过循环。

import java.util.Random;

public class mapTest {
    protected Random rd = new Random();

    public Location generateMap(int roomNum){
        Location entrance = new Location("1");
        Location current = entrance;
        for (int i = 0;iint direction = rd.nextInt(4);
            if (direction==0){
                if (current.North == null){
                    Location next = new Location(Integer.toString(i+2));
                    System.out.println(next.name+" is at the North of "+current.name);
                    current.North = next;
                    current = current.North;
                }else{
                    i-=1;
                    System.out.println("Occupied! Heading back...");
                }
            }else if (direction==1){
                if (current.West == null){
                    Location next = new Location(Integer.toString(i+2));
                    System.out.println(next.name+" is at the West of "+current.name);
                    current.West = next;
                    current = current.West;
                }else{
                    i-=1;
                    System.out.println("Occupied! Heading back...");
                }
            }else if (direction==2){
                if (current.South == null){
                    Location next = new Location(Integer.toString(i+2));
                    System.out.println(next.name+" is at the South of "+current.name);
                    current.South = next;
                    current = current.South;
                }else{
                    i-=1;
                    System.out.println("Occupied! Heading back...");
                }
            }else if (direction==3){
                if (current.East == null){
                    Location next = new Location(Integer.toString(i+2));
                    System.out.println(next.name+" is at the East of "+current.name);
                    current.East = next;
                    current = current.East;
                }else{
                    i-=1;
                    System.out.println("Occupied! Heading back...");
                }
            }
        }
        return entrance;
    }

    public static void main(String[] args) {
        mapTest mt = new mapTest();
        mt.generateMap(10);
    }
}

Location类代码

public class Location {
    protected String name;
    protected Location North;
    protected Location West;
    protected Location South;
    protected Location East;
    
    public Location(String n){
        this.name = n;
    }

    public String toString(){
        return "This place is "+name;
    }
}

直接在你的代码中加上创建location的代码即可。