Question

我目前有这个游戏对象，我想知道为什么密钥控制不起作用。我认为它是因为我在JPanel上的某个地方有一个JTextBox，我删除它就是放弃焦点。虽然不完全确定。

我曾经让Game类控制这个动作，但是这个曾经工作过一次而且再也没有用了。再次，不知道为什么。

game.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
 if (e.getKeyCode() == KeyEvent.VK_LEFT) {
            object.setVx(-10);
            System.out.println("hello");
        } else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
            object.setVx(10);
        } else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
            object.setVy(10);
        } else if (e.getKeyCode() == KeyEvent.VK_UP) {
            object.setVy(-10);
        }
    }

    public void keyReleased(KeyEvent e) {
        object.setVx(0);
        object.setVy(0);
    }
});

这是我尝试实现键绑定器的尝试，这似乎也不起作用：

public class Main implements Runnable{

public static Game game;

private static final String LEFT = "Left";

private Action left = new AbstractAction(LEFT) {
    private static final long serialVersionUID = 1L;

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println(LEFT);
    }
};
private static final String RIGHT = "Right";
private Action right = new AbstractAction(RIGHT) {
    private static final long serialVersionUID = 1L;

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println(RIGHT);
    }
};

public void run() {

/**here is where I try to put the keystroke in the map
*
*
*/

game.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), LEFT);
game.getActionMap().put(LEFT, left);
game.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0), RIGHT);
game.getActionMap().put(RIGHT, right);

/**
*the mouselistener below works
*
*/

// add listeners for the game 
game.addMouseListener(new MouseAdapter() {
    @Override
    public void mouseClicked(MouseEvent e) {
        object.jump();
    }
});

// Start game
Game.reset();

这是我的可编辑和可运行的代码：它实现了相同的功能，并且它可以工作，我非常确定Game类或我的Main.java中还有其他东西正在破坏键绑定。

public class testKeyBinding implements Runnable {

private static final String LEFT = "Left";
private Action left = new AbstractAction(LEFT) {
    private static final long serialVersionUID = 1L;

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println(LEFT);
    }
};
private static final String RIGHT = "Right";
private Action right = new AbstractAction(RIGHT) {
    private static final long serialVersionUID = 1L;

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println(RIGHT);
    }
};
@Override
public void run() { 
    JFrame frame = new JFrame();
    frame.setSize(800, 800);
    JPanel test = new JPanel();

    test.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), LEFT);
    test.getActionMap().put(LEFT, left);
    test.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0), RIGHT);
    test.getActionMap().put(RIGHT, right);

    frame.add(test);
    frame.setVisible(true);
}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new testKeyBinding());
}

}

箭头控制不适用于移动对象

0 个答案: