java - java中点击事件时如何检查按键是否按下

Question

我想在按下按键(不是ctrl、shift或alt)时捕获java中的Clicked事件，或者检查按键“A”是否按下而按键“D”按下。我该怎么做，比如 isshiftdown 方法？

Answer 1

添加一个鼠标监听器，如下所示:

component.addMouseListener(new MouseAdapter(){
  public void mousePressed(MouseEvent e){
    mouseDown = true;
  }
  public void mouseReleased(MouseEvent e){
    mouseDown = false;
  }
});

和关键监听器:

component.addKeyListener(new KeyAdapter(){
  public void keyPressed(KeyEvent e){
    if(mouseDown){
      System.out.println("the key was pressed while the mouse is down.");
    }
  }
});