Question

JPanel上通过鼠标点击出现图形的问题

具体描述下问题：现在已有一个JPanel的对象，希望通过鼠标的点击，在鼠标点击到的位置，出现一个小的实心圆，应该要如何设置这段代码？
拜托各位大神了。。。
补充说明一下，我所指的“鼠标点击”是指在JPanel的对象上直接点击，不是按JButton或者其他的按钮，就好像在纸上按手印的效果。。。
再谢一次各位大神了。。。

Answer 1

e;
import java.awt.Dimension;
import javax.swing.JPanel;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import java.awt.Rectangle;

public class HideButton extends JFrame {

private JPanel jPanel = null;
private JButton jButton = null;

/**
* This method initializes
*
*/
public HideButton() {
super();
initialize();
}

/**
* This method initializes this
*
*/
private void initialize() {
this.setSize(new Dimension(239, 129));
this.setContentPane(getJPanel());
this.setVisible(true);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
}

/**
* This method initializes jPanel
*
* @return javax.swing.JPanel
*/
private JPanel getJPanel() {
if (jPanel == null) {
jPanel = new JPanel();
jPanel.setLayout(null);
jPanel.add(getJButton(), null);
}
return jPanel;
}

/**
* This method initializes jButton
*
* @return javax.swing.JButton
*/
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setBounds(new Rectangle(72, 29, 109, 39));
jButton.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseEntered(java.awt.event.MouseEvent e) {
jButton.setVisible(false);
}
public void mouseExited(java.awt.event.MouseEvent e) {
jButton.setVisible(true);
}
});
}
return jButton;
}
public static void main(String args[]){
new HideButton().setVisible(true);
}
}

Answer 2

public class ImageJPanel extends JLabel implements MouseListener
{
public ImageJPanel()
{
this.setSize(100);
addMouseListener(this);
}
public void mouseDragged(MouseEvent e)
{
//鼠标事件
}
public void mousePressed(MouseEvent e)
{
//画圆
}
//略
}

public Test extends JFrame
{
JFrame jframe = new JFrame("test");
ImageJPanel jpanel = new ImageJpanel;
jframe.add(jpanel);
jpanel.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{

}
}
this.setSize(120);
}