Java：在mac键盘输入上只触发一次

Question

我遇到的问题是如何克服键盘问题。当我按下“向上”和“向下”等某些键时，方法keyPressed继续激活，但是当我按下“w”或“s”键时，该方法仅激活一次，直到我释放并再次按下它。我想知道如何模拟重复按键。

这是输入类：

public class Input extends KeyAdapter{

    private GameObject p1;
    private GameObject p2;

    public Input(Handler handler){
        p1 = handler.object.get(0);
        p2 = handler.object.get(1);
    }

    public void keyPressed(KeyEvent e){

        System.out.println("thismethodactivated");

        int key = e.getKeyCode();
        if(key == KeyEvent.VK_W) p1.setVelY(-5);
        if(key == KeyEvent.VK_S) p1.setVelY(5);
        if(key == KeyEvent.VK_D) p1.activate(1);

        if(key == KeyEvent.VK_UP) p2.setVelY(-5);
        if(key == KeyEvent.VK_DOWN) p2.setVelY(5);
        if(key == KeyEvent.VK_LEFT) p2.activate(1);
    }

    public void keyReleased(KeyEvent e){
        int key = e.getKeyCode();
        if(key == KeyEvent.VK_W) p1.setVelY(0);
        if(key == KeyEvent.VK_S) p1.setVelY(0);

        if(key == KeyEvent.VK_UP) p2.setVelY(0);
        if(key == KeyEvent.VK_DOWN) p2.setVelY(0);
    }
}