程序代码:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class dbclick extends Applet implements MouseListener  
{
  boolean isDoubleClick = false;  // 是否双击标志

  public void init()
  {
    addMouseListener(this);   // 进行鼠标事件监听
  }

  public void paint(Graphics g)
  {
    g.drawString("请单击或双击鼠标", 10,10);
    if(isDoubleClick)
      g.drawString("您双击了鼠标",10,30);
    else
      g.drawString("            ",10,30);  // 清除显示双击信息
  }

  public void mousePressed(MouseEvent e) {}
  public void mouseReleased(MouseEvent e) {}
  public void mouseEntered(MouseEvent e) {}
  public void mouseExited(MouseEvent e) {}
  public void mouseClicked(MouseEvent e)
  {
    isDoubleClick = e.getClickCount() == 2;  // 连续击打次数为2,则说明是双击了鼠标
    repaint();
  }
}
说明:所谓双击,其实就是判断了连续击打鼠标键的次数,您可以把次数改成3,4,5...试试看:),还有,在以前的JDK中,具体版本不知道,是没有getClickCount()函数的,可以用两次点击鼠标键的时间间隔来判断是否在指定的范围内.其实原理就是这样.