MouseListener在JLabel中不工作

Question

我正在編寫遊戲，我的項目結構如下：

我們有一個抽象類，所有其他類都從它繼承。

public abstract class Bird extends JLabel implements MouseListener { 
     private static final long serialVersionUID = 1L; 

     private int M_weight; 
     private int M_radius; 
     private long M_bornTime; 
     private int M_maxBirdPower; 
     private BirdState M_birdState; 
     private boolean B_prepareToShoot; 

     public Bird(int weight, int radius, long bornTime, int maxBirdPower, 
       BirdState birdState) { 
      this.M_weight = weight; 
      this.M_radius = radius; 
      this.M_bornTime = bornTime; 
      this.M_maxBirdPower = maxBirdPower; 
      this.M_birdState = birdState; 
      this.B_prepareToShoot = false; 
      this.addMouseListener(this); 
     } 

     public BirdState getBirdState() { 
      return M_birdState; 
     } 
    } 

還有一些類爲RedBird，它繼承自Bird類並實現了抽象函數。

public class RedBird extends Bird { 
     private static final long serialVersionUID = 1L; 

     public RedBird(int weight, int radius, long bornTime, int maxBirdPower, 
       BirdState birdState) { 
      super(weight, radius, bornTime, maxBirdPower, birdState); 
     } 

     @Override 
     public void mouseClicked(MouseEvent arg0) { 
       System.out.println("Clicked"); 
     } 

     @Override 
     public void mouseEntered(MouseEvent arg0) { 
     } 

     @Override 
     public void mouseExited(MouseEvent arg0) { 
     } 

     @Override 
     public void mousePressed(MouseEvent arg0) { 
     } 

     @Override 
     public void mouseReleased(MouseEvent arg0) { 
     } 
    } 

我在JPanel中添加了一個對象從紅鳥級，但是當我在此對象上單擊，MouseListener不起作用。問題是什麼 ？任何人都可以給我一個解決方案。

感謝提前:)

Answer 1

你還沒有「補充說：」你的鼠標監聽到任何的JComponent。這就是爲什麼它不起作用。 在你的鳥類的構造函數中添加以下代碼：

this.addMousListener(this);