Java - 单击鼠标时，tick() 循环会导致多个操作

Question

我正在用java制作一个游戏，我添加了鼠标输入。这是我的代码。

public class MouseInput implements MouseListener, MouseMotionListener {

public static boolean leftPressed;
public static boolean rightPressed;

public MouseInput(){

}
public void tick(){
    if(leftPressed){
        System.out.println("left pressed");
    }
}

@Override
public void mousePressed(MouseEvent e) {
    if(e.getButton() == MouseEvent.BUTTON1){
        leftPressed = true;

    }else if(e.getButton() == MouseEvent.BUTTON3){
        rightPressed = true;

    }
}

@Override
public void mouseReleased(MouseEvent e) {
    if(e.getButton() == MouseEvent.BUTTON1)
        leftPressed = false;
    else if(e.getButton() == MouseEvent.BUTTON3)
        rightPressed = false;

}

我删除了所有与此问题无关的多余代码，例如 getter、setter 和抽象方法。

当我运行这个并点击我看到的是

left pressed
left pressed
left pressed
left pressed
left pressed
left pressed

好几次了。这是因为它位于 tick 方法内部，该方法每秒更新 60 次。我可以对 mousePressed 和 mouseReleased 方法进行哪些更改以使其成为一个

left pressed

非常感谢

Answer 1

What can I change to the mousePressed and mouseReleased methods to only make it one

目前，您显然可以将 sysout 语句从 tick() 方法移至 mousePressed()

public void tick(){
    if(leftPressed){
    }
}

@Override
public void mousePressed(MouseEvent e) {
    if(e.getButton() == MouseEvent.BUTTON1){
        leftPressed = true;
        System.out.println("left pressed");

    }else if(e.getButton() == MouseEvent.BUTTON3){
        rightPressed = true;

    }
}

因此，您不应该重复 mousePressed() 和 mouseReleased() 中的代码，选择更适合您需要的一个。

为了避免空方法实现，您可以继承 MouseAdapter其中有几个与鼠标相关的监听器的空方法实现