KeyAdapter侦听器适用于Windows，而不适用于Mac [英] KeyAdapter listener works in Windows, not on Mac

问题描述

我创建了一个简单的Nibbles（Snakes）游戏，一切都很完美。

I created a simple Nibbles (Snakes) game and everything works perfectly.

然而，当我将所有内容复制到我的mac（在PC上开发）并编译时相同的java文件，用于移动我的蛇的keyAdapter事件监听器没有响应。

However, when I copy everything over to my mac (develop on a PC) and compile the same java files, the keyAdapter event listener for moving my snake around doesn't respond.

我不确定是什么问题。

这里是片段，但如果有人愿意看一下整个节目，我可以私下发送。谢谢！

here's the snippet, but if anyone would be willing to take a look at the whole program, I could send that privately. THANKS!

getThis().addKeyListener(new KeyAdapter()  {
        public void keyPressed(KeyEvent event) {                    
            if(event.getKeyCode() == KeyEvent.VK_UP)
                if(!glass.game.getDirection().equals("D"))
                    glass.game.setDirection("U");

            if(event.getKeyCode() == KeyEvent.VK_DOWN)
                if(!glass.game.getDirection().equals("U"))
                    glass.game.setDirection("D");

            if(event.getKeyCode() == KeyEvent.VK_LEFT)
                if(!glass.game.getDirection().equals("R"))
                    glass.game.setDirection("L");

            if(event.getKeyCode() == KeyEvent.VK_RIGHT)
                if(!glass.game.getDirection().equals("L"))
                    glass.game.setDirection("R");
          }
});   

推荐答案

使用 KeyBindings 而不是 KeyListener ， KeyListener 未指定用于侦听 KeyEvents 在Swing JComponents中，这是AWT组件的监听器，例如这里

use KeyBindings instead of KeyListener, KeyListener isn't designated for listening KeyEvents in the Swing JComponents, this's listener for AWT Components, example here

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