按住键后执行某项操作，并在释放并按下该键时重复进行 [英] do something once the key is held and repeat when its released and repressed

问题描述

我需要检查用户何时按下某个键并将其释放. 如果按住某个键，我将执行一次操作.

I need to check when the user presses on a key and releases it. If a key is held in, I will do something once.

我使用按键来获取要与之关联的按钮. 我还使用了一个信号量来克服这个问题，但是看起来很疯狂

I used the keystroke to get the button I want to relate an action with. I used also a semaphore to overcome this problem but it looks crazy

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

When I press "1" key and hold it, it prints: false true false true false true

谢谢.

推荐答案

我不相信您可以在Linux中实现所需的功能，因为操作系统会不断向JVM发出按下/释放信号.

I don't believe you can achieve what you need in Linux, because the operating system continually issues press/release signals to the JVM.

请参见

• 如何停止重复的keyPressed()/keyReleased() Swing中的事件
• 如何知道当用户真正发布了Java密钥时?

• How to stop repeated keyPressed() / keyReleased() events in Swing
• How to know when a user has really released a key in Java?

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