我写的一个双击事件的监听，大家帮忙看看怎么实现需求

[lqsmn613]

MouseListener popup = new MouseListener() {

boolean mouse ;

public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
if(mouse = true){
if (e.getClickCount() == 2) {
JOptionPane jo = new JOptionPane();
jo.showMessageDialog(null, "里面双击", "标题条文字串", JOptionPane.ERROR_MESSAGE);
}
}else{
if (e.getClickCount() == 2) {
JOptionPane jo = new JOptionPane();
jo.showMessageDialog(null, "外面双击", "标题条文字串", JOptionPane.ERROR_MESSAGE);
}
}

}

public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
mouse = true;
}

public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
mouse = false;
}

public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub

}

public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub

}

};


上面的就是双击事件的监听代码。
我想要的是判断鼠标是否进入，由进入是否来实现双击事件的实施。
我想用个布尔值判断貌似不行。。。。

[lqsmn613]

自己顶下。。。。。。。。
大家帮帮忙啊

[daisycool]

这个命题就是错误的。你在一个Component上添加事件监听，进入并且双击，或者离开并且双击，第二种状况永远也不可能出现，因为当鼠标离开这个Component的时候，mouseClicked事件也不会被监听到了。

如果你依然想实现这个目标，你需要在两个地方添加MouseListener，一个是全局的，一个是这个标题字符串。标题字符串的那个事件里只负责mouseEntered和mouseExited，而全局的监听则负责监听鼠标点击。

import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class DoubleClick extends JPanel {

	boolean entered;

	public DoubleClick() {
		this.setLayout(null);
		JLabel label = new JLabel("Hello");
		label.setBounds(100, 100, 100, 100);
		label.setBorder(BorderFactory.createLineBorder(Color.black));
		this.add(label);

		this.addMouseListener(new MouseListener() {

			public void mouseReleased(MouseEvent e) {
				// TODO Auto-generated method stub

			}

			public void mousePressed(MouseEvent e) {
				// TODO Auto-generated method stub

			}

			public void mouseExited(MouseEvent e) {
				// TODO Auto-generated method stub

			}

			public void mouseEntered(MouseEvent e) {
				// TODO Auto-generated method stub

			}

			public void mouseClicked(MouseEvent e) {
				panel_mouseClicked(e);
			}
		});

		label.addMouseListener(new MouseListener() {

			public void mouseReleased(MouseEvent e) {
				// TODO Auto-generated method stub

			}

			public void mousePressed(MouseEvent e) {
				// TODO Auto-generated method stub

			}

			public void mouseExited(MouseEvent e) {
				entered = false;
			}

			public void mouseEntered(MouseEvent e) {
				entered = true;
			}

			public void mouseClicked(MouseEvent e) {
				panel_mouseClicked(e);
			}
		});
	}

	public void panel_mouseClicked(MouseEvent e) {
		if (entered) {
			System.out.println("Entered and clicked");
		} else {
			System.out.println("Exited and clicked");
		}
	}

	public static void main(String args[]) {
		JFrame frame = new JFrame();
		frame.setPreferredSize(new Dimension(800, 600));
		frame.setBounds(50, 50, 800, 600);
		frame.add(new DoubleClick());

		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}

}

[swandragon]

mouse是boolean型的
if(mouse)

你写的是if(mouse = true)，这个是给mouse赋值