java - 按住键后做某事并在释放和按下时重复

Question

我需要检查用户何时按下并释放键。如果有 key 在，我会做一次。

我使用击键来获取我想要关联操作的按钮。我还使用了一个信号量来解决这个问题，但它看起来很疯狂

我的代码:`

InputMap inputMap = jPanel1.getInputMap();
KeyStroke keyPressed = KeyStroke.getKeyStroke(KeyEvent.VK_1, 0, false);
KeyStroke keyReleased = KeyStroke.getKeyStroke(KeyEvent.VK_1, 0, true);
//------------------------------------------
jPanel1.getActionMap().put("_1000Press", _1000Press);
inputMap.put(keyPressed, "_1000Press");
jPanel1.getActionMap().put("_1000Release", _1000Release);
inputMap.put(keyReleased, "_1000Release");
public Action _1000Press = new AbstractAction() {

    @Override
    public void actionPerformed(ActionEvent e) {
        if(!one){
            // do some thing
            one = true;
            System.out.println(one);
        }
    }
};
public Action _1000Release = new AbstractAction() {

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

`

当我按住“1”键时，它会打印: 错误的 真的 错误的 真的 错误的 是的

提前致谢。

Answer 1

这对我来说很好

InputMap im = getInputMap();
ActionMap am = getActionMap();

im.put(KeyStroke.getKeyStroke(KeyEvent.VK_1, 0, false), "Press");
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_1, 0, true), "Release");

am.put("Press", new AbstractAction() {

    @Override
    public void actionPerformed(ActionEvent e) {

        if (!pressed) {

            pressed = true;
            System.out.println("press");

        }

    }

});

am.put("Release", new AbstractAction() {

    @Override
    public void actionPerformed(ActionEvent e) {

        if (pressed) {

            pressed = false;
            System.out.println("release");

        }

    }

});

只是为了确保我这样做了

am.put("Release", new AbstractAction() {

    @Override
    public void actionPerformed(ActionEvent e) {

        pressed = false;
        System.out.println("release");

    }

});

它仍然有效

当我按住 1 时打印 press，然后当我释放键时打印 release。那是我得到的唯一输出

已更新完整代码

public class TestPane extends JPanel {

    private boolean pressed;

    public TestPane() {

        InputMap im = getInputMap();
        ActionMap am = getActionMap();

        im.put(KeyStroke.getKeyStroke(KeyEvent.VK_1, 0, false), "Press");
        im.put(KeyStroke.getKeyStroke(KeyEvent.VK_1, 0, true), "Release");

        am.put("Press", new AbstractAction() {

            @Override
            public void actionPerformed(ActionEvent e) {

                if (!pressed) {

                    pressed = true;
                    System.out.println("press");

                }

            }

        });

        am.put("Release", new AbstractAction() {

            @Override
            public void actionPerformed(ActionEvent e) {

                if (pressed) {

                    pressed = false;
                    System.out.println("release");

                }

            }

        });

    }

}