获取鼠标单击事件的正确结果

发布于 2024-08-28 05:03:05 字数 950 浏览 8 评论 0原文

我很好奇为什么当我单击鼠标时得到“正确”但“错误”的结果数。我应该在每次单击鼠标时在控制台上打印 mouseClicked once 。然而，每次我点击鼠标时，我都会打印出其中的许多内容...有时是 5 个，

mouseClicked
mouseClicked
mouseClicked
mouseClicked
mouseClicked

而不是只是

mouseClicked

为什么？

public class GUI extends JFrame implements MouseListener, ActionListener {
.....
   public GUI {
      GridBagLayout m = new GridBagLayout();
      Container c = getContentPane();
      c.setLayout (m);
      GridBagConstraints con = new GridBagConstraints();
      ....
      JPanel pDraw = new JPanel(new GridLayout(ROWS,COLS,2,2)); 
      con = new GridBagConstraints();
      ...
      m.setConstraints(pDraw, con);

      pDraw.addMouseListener(this);     
      pack();         
      setVisible(true);       
   }

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

原文

I'm curious why I got the "right" BUT "wrong"number of result when I click the mouse.
I supposed to print on the console mouseClicked once everytimes the mouse is clicked. However I got many of them printed out everytimes I clicked the mouse ...sometimes 5 e.g.

mouseClicked
mouseClicked
mouseClicked
mouseClicked
mouseClicked

Instead of just

mouseClicked

Why?

public class GUI extends JFrame implements MouseListener, ActionListener {
.....
   public GUI {
      GridBagLayout m = new GridBagLayout();
      Container c = getContentPane();
      c.setLayout (m);
      GridBagConstraints con = new GridBagConstraints();
      ....
      JPanel pDraw = new JPanel(new GridLayout(ROWS,COLS,2,2)); 
      con = new GridBagConstraints();
      ...
      m.setConstraints(pDraw, con);

      pDraw.addMouseListener(this);     
      pack();         
      setVisible(true);       
   }

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

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倾城泪 2024-09-04 05:03:05

看看 MouseEvent 中的这个方法：

getClickCount

public int getClickCount()
返回与此事件关联的鼠标单击次数。
返回：
点击次数的整数值

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笑忘罢 2024-09-04 05:03:05

您提供的示例看起来正确并且应该可以工作。

由于您正在实现 MouseListener 接口，因此您可能需要检查是否意外在 mousePressed/mouseReleased 方法中打印了“mouseClicked”。

回复收藏 0 原文

于我来说 2024-09-04 05:03:05

感谢所有评论，因为我没有实现 mouseEvent 的所有方法，所以我应该使用 new mouseAdapter() ，这样它就不会在 mousepressed 和 mouseClicked 之间混合。

public class GUI extends JFrame implements MouseListener, ActionListener {
.....
   public GUI {
      GridBagLayout m = new GridBagLayout();
      Container c = getContentPane();
      c.setLayout (m);
      GridBagConstraints con = new GridBagConstraints();
      ....
      JPanel pDraw = new JPanel(new GridLayout(ROWS,COLS,2,2)); 
      con = new GridBagConstraints();
      ...
      m.setConstraints(pDraw, con);

      pDraw.addMouseListener(new MouseAdapter(){
         public void mouseClicked(MouseEvent e) { 
            System.out.println("mouseClicked");
         } 
      });

      pack();         
      setVisible(true);       
   }
}

Thanks for all comments, since I did not implement all methods of mouseEvent, I should use new mouseAdapter() so that it doesn't mixed between mousepressed and mouseClicked.

public class GUI extends JFrame implements MouseListener, ActionListener {
.....
   public GUI {
      GridBagLayout m = new GridBagLayout();
      Container c = getContentPane();
      c.setLayout (m);
      GridBagConstraints con = new GridBagConstraints();
      ....
      JPanel pDraw = new JPanel(new GridLayout(ROWS,COLS,2,2)); 
      con = new GridBagConstraints();
      ...
      m.setConstraints(pDraw, con);

      pDraw.addMouseListener(new MouseAdapter(){
         public void mouseClicked(MouseEvent e) { 
            System.out.println("mouseClicked");
         } 
      });

      pack();         
      setVisible(true);       
   }
}

回复收藏 0 原文

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