java - 获取鼠标单击事件的正确结果

Question

我很好奇为什么当我单击鼠标时我得到了“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，我都会打印出其中的许多内容......有时是 5 个，例如

mouseClicked
mouseClicked
mouseClicked
mouseClicked
mouseClicked

而不仅仅是

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");       
   }
}

Answer 1

看看 MouseEvent 中的这个方法:

获取点击计数

公共(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