Java AWT鼠標事件

Question

我有一個使用AWT事件模型的小程序。它有一個布爾值，表示是否按下左按鈕。下面是一個示例代碼：

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 
} 

但它好像左鍵永遠不會釋放，你居然這樣做，即使之後。可能是什麼問題呢？

Answer 1

在這個根本不正確，

這些都是鼠標事件，

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

所以，當你處理click事件，這意味着鼠標點擊和釋放。

所以我認爲你必須使用mousepressed而不是點擊。

MouseEvent

Answer 2

方法mouseClicked將在mouseReleased方法後調用，所以isLgetButtonPressed的值將爲true。您必須使用MouseEvent.getButton()方法來檢查按下了哪個鼠標按鈕。