我正在创造一个迷宫游戏。为此，我创建了4个单独的类文件。我想知道如何在Player.class move（）方法中访问Maze.class的囚犯，而不仅仅是读取它，还要添加它并覆盖它：
Maze.class
package y1;
import java.util.*;
@SuppressWarnings(value = "all")
public class Maze {
private Room entry;
private Map <Room, ArrayList<Player>> inmates=new HashMap<Room,ArrayList<Player>>();
/**
*
* @param r The room that is going to be the entry
*/
public void setEntry(Room r){
this.entry=r;
}
/**
*
* @return Returns the entry room
*/
public Room getEntry(){
return this.entry;
}
/**
* Method adds a player to the maze
* @param p Player to be added to the maze
*/
public void addPlayer(Player p){
ArrayList<Player> players=new ArrayList<Player>();
p.setRoom(getEntry());
if (this.inmates.isEmpty()==true){
players.add(p);
this.inmates.put(this.entry,players);
}
else{
players=this.inmates.get(this.entry);
players.add(p);
}
this.inmates.put(p.getRoom(), players);
}
public void getPlayers(Room r){
if(this.inmates.get(r)!=null){
System.out.println(Arrays.asList(this.inmates.get(r)));
}
else{
System.out.println("Ruum on tühi");
}
}
public Map getInmates(){
return this.inmates;
}
}
Room.class
package y1;
import java.util.*;
@SuppressWarnings(value = "all")
public class Room {
private String name;
private Room north;
private Room east;
private Room west;
private Room south;
private boolean isExit = false;
private boolean isPortal = false;
private Maze maze;
/**
* @return Returns the name of the room
*/
public String getName() {
return this.name;
}
/**
* Sets room name
*
* @param name
*/
public void setName(String name) {
this.name = name;
}
/**
* Gets northern room if any
*
* @return pointer to northern room if any, otherwise <code>null</code>
*/
public Room getNorth() {
return this.north;
}
/**
* Sets the door to the next room to the north in that room and in the other
* room sets southern door as connecting back to that room
*
* @param otherRoom
*/
public void setNorth(Room otherRoom) {
this.north = otherRoom;
otherRoom.south = this;
}
public Room getSouth() {
return this.south;
}
/**
* Sets the door to the next room to the south in that room and in the other
* room sets northern door as connecting back to that room
*
* @param otherRoom
*/
public void setSouth(Room otherRoom) {
this.south = otherRoom;
otherRoom.north = this;
}
public Room getEast() {
return this.east;
}
/**
* Sets the door to the next room to the east in that room and in the other
* room sets western door as connecting back to that room
*
* @param otherRoom
*/
public void setEast(Room otherRoom) {
this.east = otherRoom;
otherRoom.west = this;
}
public Room getWest() {
return this.west;
}
/**
* Sets the door to the next room to the west in that room and in the other
* room sets eastern door as connecting back to that room
*
* @param otherRoom
*/
public void setWest(Room otherRoom) {
this.west = otherRoom;
otherRoom.east = this;
}
/**
* Returns the room in the given direction
*
* @param Which way to move?
* @return The room in that direction.
*/
public Room get(String direction){
Room dir=this;
if(direction=="N" && this.north!=null){
dir=dir.getNorth();
return dir;
}
else if(direction=="W" && this.west!=null){
dir=dir.getWest();
return dir;
}
else if(direction=="E" && this.east!=null){
dir=dir.getEast();
return dir;
}
else if(direction=="S" && this.south!=null){
dir=dir.getSouth();
return dir;
}
else{
return dir;
}
}
/**
* Returns the room that givens coordinates point to
*
* @param dirlist List of directions
* @return returns Returns the room it stops in
*/
public Room get(List<String> dirlist){
Room dir=this;
if (validate(dirlist)==true){
for(int i=0;i<dirlist.size();i++){
if(dirlist.get(i)=="N"){
dir=dir.getNorth();
}
else if(dirlist.get(i)=="W"){
dir=dir.getWest();
}
else if(dirlist.get(i)=="E"){
dir=dir.getEast();
}
else if(dirlist.get(i)=="S"){
dir=dir.getSouth();
}
}
}
return dir;
}
/**
* creates a new room to the north and connects back to this room
*
* @param toa nimi
* 0
* @return uus tuba
*/
public Room createNorth(String name) {
Room otherRoom = null;
// Creates new room only when no room lies ahead in this direction
if (this.getNorth() == null) { // Checks north - if nothing there then new room is create
otherRoom = new Room(); // Creates new room
this.setNorth(otherRoom); // Creates door between rooms
otherRoom.setName(name); // Names the room
} else { // If room already exists then prints alert message
System.out.println("Room already exist!");
}
return otherRoom;
}
public Room createSouth(String name) {
Room otherRoom = null;
if (this.getSouth() == null) {
otherRoom = new Room();
this.setSouth(otherRoom);
otherRoom.setName(name);
} else {
System.out.println("Room already exists!");
}
return otherRoom;
}
public Room createEast(String name) {
Room otherRoom = null;
if (this.getEast() == null) {
otherRoom = new Room();
this.setEast(otherRoom);
otherRoom.setName(name);
} else {
System.out.println("Room already exists!");
}
return otherRoom;
}
public Room createWest(String name) {
Room otherRoom = null;
if (this.getWest() == null) {
otherRoom = new Room();
this.setWest(otherRoom);
otherRoom.setName(name);
} else {
System.out.println("Room already exists!");
}
return otherRoom;
}
public void setExit(){
this.isExit=true;
}
public void setPortalA(){
this.isPortal=true;
}
public boolean validate(List<String> pathList){
Room check = this;
boolean value=false;
for(int i = 0;i<pathList.size();i++){
if(pathList.get(i)=="N" && check.north!=null){
check=check.north;
value=true;
}
else if(pathList.get(i)=="S" && check.south!=null){
check=check.south;
value=true;
}
else if(pathList.get(i)=="W" && check.west!=null){
check=check.west;
value=true;
}
else if(pathList.get(i)=="E" && check.east!=null){
check=check.east;
value=true;
}
else{
value = false;
System.out.println("Can't move in the given directions!");
}
}
return value;
}
@Override
public String toString() {
return this.getName();
}
}
和Player.class
package y1;
import java.util.*;
public class Player {
private String name;
private Room location;
public void setRoom(Room r){
this.location=r;
}
public Room getRoom(){
System.out.println(this.name+" is at " +this.location);
return this.location;
}
public Room move(String dir){
Player p=this;
if(dir=="N" && this.location.getNorth()!=null){
p.location=p.location.getNorth();
}
else if(dir=="S" && this.location.getSouth()!=null){
p.location=p.location.getSouth();
}
else if(dir=="W" && this.location.getWest()!=null){
p.location=p.location.getWest();
}
else if(dir=="E" && this.location.getEast()!=null){
p.location=p.location.getEast();
}
else{
System.out.println("There's a wall in the way!");
}
return this.location;
}
public Room move(List<String> dirList){
Player player=this;
for(int i=0 ; i<dirList.size() ; i++){
if(dirList.get(i)=="N" && player.location.getNorth()!=null){
player.location=player.location.getNorth();
}
else if(dirList.get(i)=="S" && player.location.getSouth()!=null){
player.location=player.location.getSouth();
}
else if(dirList.get(i)=="W" && player.location.getWest()!=null){
player.location=player.location.getWest();
}
else if(dirList.get(i)=="E" && player.location.getEast()!=null){
player.location=player.location.getEast();
}
else{
System.out.println("Wall in the way. Stopping!");
break;
}
}
return this.location;
}
public void setName(String n){
this.name=n;
}
@Override
public String toString() {
return this.name;
}
}
答案 0 :(得分：3)
您需要创建修饰符方法，例如
public void resetInmates(){
this.inmates = new Map();
}
public void addInmate( Room r, ArrayList<Player> players ){
}
public void removeInmate( Room r ){
}
等
答案 1 :(得分：2)
玩家需要以某种方式引用Maze对象，以便在其上调用getInmates（）方法（或任何其他修改方法）。
您如何获得参考资料取决于您，并且有很多方法可以做到这一点。一种方法是让玩家的位置（房间对象）提供参考。为此，您可以在Room对象中实现一个getMaze（）方法，该方法将返回Room的Maze。在Player的move（）方法中，您可以在Player的'location'属性（即Room）上调用getMaze（），然后在返回的Maze对象上调用getInmates（）。
之后，就是你想如何在Maze对象上实现修饰符/重置方法。
答案 2 :(得分：0)
简单地从囚犯字段中移除private使其对同一个包中的其他类具有可读性，但对于creata getter方法（可能也包可见）来说，这将是一个很好的设计。