Java 2 播放器在 1 个键盘上使用 AWSD 和箭头

Question

我正在用java制作一个游戏，它运行得很好。但问题是，当我在 map 上生成 2 个玩家并且我正在移动 1 个玩家时，另一个玩家也会同步移动。我希望玩家 1 使用 (AWSD)，玩家 2 使用箭头。

这是我现在的类代码:“KeyInput”

 public void keyPressed(KeyEvent e){
        int key = e.getKeyCode();

        //If the special key is pressed, set it to true.
        if(key == KeyEvent.VK_W) handler.setUp(true);
        if(key == KeyEvent.VK_S) handler.setDown(true);
        if(key == KeyEvent.VK_A) handler.setLeft(true);
        if(key == KeyEvent.VK_D) handler.setRight(true);

        if(key == KeyEvent.VK_I) handler.setUp(true);
        if(key == KeyEvent.VK_K) handler.setDown(true);
        if(key == KeyEvent.VK_J) handler.setLeft(true);
        if(key == KeyEvent.VK_L) handler.setRight(true);
    }
    //If the pressed key is released, set everything to false.
    public void keyReleased(KeyEvent e){
        int key = e.getKeyCode();

        //If the special key is released, put it to false.
        if(key == KeyEvent.VK_W) handler.setUp(false);
        if(key == KeyEvent.VK_S) handler.setDown(false);
        if(key == KeyEvent.VK_A) handler.setLeft(false);
        if(key == KeyEvent.VK_D) handler.setRight(false);
        if(key == KeyEvent.VK_P) handler.setDropBomb(true);

        if(key == KeyEvent.VK_I) handler.setUp(false);
        if(key == KeyEvent.VK_K) handler.setDown(false);
        if(key == KeyEvent.VK_J) handler.setLeft(false);
        if(key == KeyEvent.VK_L) handler.setRight(false);
        if(key == KeyEvent.VK_M) handler.setDropBomb(true);    
    }

在“Player”类中，代码如下:

public Player(int x, int y, ID id, Handler handler, Game game, SpriteSheet ss) {
        super(x, y, id, ss);
        this.handler = handler;
        this.game = game;

        //Get the player image of the SpriteSheet
        player_image= ss.grabImage(1,1,32,48);
    }

    public void tick() {
        x += velX;
        y += velY;

        collision();

        //Set the movement of the player: left,right,up,down
        if(handler.isUp()) velY = -5;
        else if(!handler.isDown()) velY = 0;

        if(handler.isDown()) velY = 5;
        else if(!handler.isUp()) velY = 0;

        if(handler.isRight()) velX = 5;
        else if(!handler.isLeft()) velX = 0;

        if(handler.isLeft()) velX = -5;
        else if(!handler.isRight()) velX = 0;

        if(handler.isDropped()){
            Dropbomb(x,y);
        }

    }

我已经思考这个问题很多年了。我尝试制作第二个处理程序，但这导致了很多重复的代码。不知何故有一个想法？

Answer 1

您需要区分哪些键影响玩家 1，哪些键影响玩家 2。像这样的事情:

    //If the special key is pressed, set it to true.
    if(key == KeyEvent.VK_W) handler.setUpPlayer1(true);
    if(key == KeyEvent.VK_S) handler.setDownPlayer1(true);
    if(key == KeyEvent.VK_A) handler.setLeftPlayer1(true);
    if(key == KeyEvent.VK_D) handler.setRightPlayer1(true);

    if(key == KeyEvent.VK_I) handler.setUpPlayer2(true);
    if(key == KeyEvent.VK_K) handler.setDownPlayer2(true);
    if(key == KeyEvent.VK_J) handler.setLeftPlayer2(true);
    if(key == KeyEvent.VK_L) handler.setRightPlayer2(true);

或者您可以将玩家作为变量传递:

...
if(key == KeyEvent.VK_W) handler.setUp(true,1);
...
if(key == KeyEvent.VK_I) handler.setUp(true,2);
...

或者，如果您可以全局访问玩家变量，如下所示:

...
if(key == KeyEvent.VK_W) handler.setUp(true, Global.PLAYER_1);
...
if(key == KeyEvent.VK_I) handler.setUp(true, Global.PLAYER_2);
...