Java AWT鼠标事件

Question

我有一个使用AWT事件模型的小程序。它有一个布尔值，表示是否按下左按钮。下面是一个示例代码：

public class Game extends Applet implements MouseListener 
{ 
    boolean isLeftButtonPressed; 

    public void init() 
    { 
     addMouseListener(this); 
     isLeftButtonPressed = false; 
    } 

    public void paint(Graphics g) 
    { 
     g.drawString("Is Button Pressed: " + isLeftButtonPressed, 20, 20); 
    } 

@Override 
public void mouseClicked(MouseEvent e) 
    { 
     isLeftButtonPressed = true; 
     repaint(); 
} 

    @Override 
public void mouseReleased(MouseEvent e) 
    { 
     isLeftButtonPressed = false; 
     repaint(); 
} 

    //Other MouseListener methods not listed but have to be implemented 
} 

但它好像左键永远不会释放，你居然这样做，即使之后。可能是什么问题呢？

Answer 1

在这个根本不正确，

这些都是鼠标事件，

MousePressed -> a mouse button is pressed 
MouseReleased -> a mouse button is released 
MouseClicked -> a mouse button is clicked (pressed and released) 

所以，当你处理click事件，这意味着鼠标点击和释放。

所以我认为你必须使用mousepressed而不是点击。

MouseEvent

Answer 2

方法mouseClicked将在mouseReleased方法后调用，所以isLgetButtonPressed的值将为true。您必须使用MouseEvent.getButton()方法来检查按下了哪个鼠标按钮。