Question

javaswing鼠标事件问题

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ztl extends JFrame
{Container c=getContentPane();
JLabel lb;
Image image;

public ztl(){

ImageIcon img=new ImageIcon("me.gif");

lb=new JLabel(img);

add(lb,BorderLayout.CENTER);

setSize(800,600);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);}

public void mousePressed(MouseEvent e)
{
setVisible(false);
}

public static void main(String as[]){
new ztl();

}
}
我想做一个程序。按住左键才能显示图像，松开就无法显示，求改进,这个不能跑
或者按住左键图像就消失了

Answer 1

import java.awt.BorderLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JButton;
import javax.swing.JFrame;

public class HideShow extends JFrame {

/**
*
*/
private static final long serialVersionUID = 1L;

JButton button, button1;

public HideShow() {
setLayout(new BorderLayout());
button = new JButton("aa");
button1 = new JButton("bb");
button1.setVisible(false);

button.addMouseListener(new MouseListener() {

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

}

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

}

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

}

public void mousePressed(MouseEvent e) {
button1.setVisible(true);
}

public void mouseReleased(MouseEvent e) {
button1.setVisible(false);
}

});

this.add(button, BorderLayout.NORTH);
this.add(button1, BorderLayout.SOUTH);
}

public static void main(String[] args) {
HideShow hs = new HideShow();
hs.setSize(500, 500);
hs.setVisible(true);
hs.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

自己把button1换成图片吧~~~