修复Java按键操作中的延迟问题 [英] Fixing delay issue in java keypress action

问题描述

我正在创建一个使用键侦听器的Java应用程序.我注意到，当用户按住键时使用按键监听器时，它会注册，然后花一秒钟的时间来检测保持状态.有办法摆脱这种短暂的延迟吗?

I am creating a Java application that uses the keylistener. I have noticed that when using the keypressed listener when the user is holding down the key, it registers and then takes a second to detect the hold. Is there a way to get rid of this short delay?

public void keyPressed(KeyEvent arg0) 
{
    char key = arg0.getKeyChar();
    if(key == 'a')
        update = Status.Left;
    else if(key == 's')
        update = Status.Crouch;
    else if(key == 'd')
        update = Status.Right;
    else if(key == ' ')
        update = Status.Shoot;
    else
        update = Status.None;
    System.out.println(arg0.getKeyChar());
    this.repaint();
}

推荐答案

我建议您不要使用keyPressed事件检测到保持状态.使用计时器不断检查按键是否被按下.使用一个BitSet.在keyPressed和keyReleased上更新BitSet以跟踪按下的键.这样，您可以一次检测多个按键. 如果您要开发游戏，那么您已经拥有可以用于此目的的游戏时钟

I suggest you don't detect the hold using the keyPressed event. Use a timer to constantly check for pressed keys. Use a BitSet. On keyPressed and on keyReleased update the BitSet to keep track of the pressed keys. This way you can detect multiple key presses at once. If you are building a game you already have the game clock which could be used for this

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