鼠标点击，没有反应。在线急等！！！

[理想哥]

想在frame上，任意处点击后，出现一个按钮，但实现不了！然直接在frame上加，没有问题，我现在将jbutton的相关语句剪贴到鼠标触发函数中，再运行后，在frame上点击没有反应？以下是我的完成小程序，大家可以试一下，帮忙解决！！！
package sw2;
import javax.swing.UIManager;
import java.awt.*;

public class Application2 {
boolean packFrame = false;

//Construct the application
public Application2() {
Frame2 frame = new Frame2();
//Validate frames that have preset sizes
//Pack frames that have useful preferred size info, e.g. from their layout
if (packFrame) {
frame.pack();
}
else {
frame.validate();
}
//Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
frame.setVisible(true);
}

//Main method
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e) {
e.printStackTrace();
}
new Application2();
}
}
------------------------------------------------------------------------------------------
package sw2;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;

public class Frame2 extends JFrame {
JPanel contentPane;
XYLayout xYLayout1 = new XYLayout();

//Construct the frame
public Frame2() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}

//Component initialization
private void jbInit() throws Exception {
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(xYLayout1);
this.setSize(new Dimension(400, 300));
this.setTitle("Frame Title");
contentPane.addMouseListener(new Frame2_contentPane_mouseAdapter(this));
}

//Overridden so we can exit when window is closed
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}

void contentPane_mouseClicked(MouseEvent e) {
JButton jButton1 = new JButton();
contentPane.add(jButton1, new XYConstraints(98, 57, 186, 40));
}
}

class Frame2_contentPane_mouseAdapter extends java.awt.event.MouseAdapter {
Frame2 adaptee;

Frame2_contentPane_mouseAdapter(Frame2 adaptee) {
this.adaptee = adaptee;
}
public void mouseClicked(MouseEvent e) {
adaptee.contentPane_mouseClicked(e);
}
}

[理想哥]

嘿，各位不能见死不救呀！不会的也帮忙顶呀，顶者有分！

[yxlleslie]

我试验了一下，我在contentPane.add(jButton1, new XYConstraints(98, 57, 186, 40));
之后加了一句contentPane.updateUI();然后就又反应了，你看一下好用否？
不过我记得一般不用这种方法来实现，因为我也有很多问题在等别人回答，所以就不帮你研究了。

[理想哥]

嘿，各位不能见死不救呀！不会的也帮忙顶呀，顶者有分！

[chy2swl]

关键是没有时间
up一下吧

[yxlleslie]

为什么不看一下我说的是否能好用? 抗议!

[理想哥]

你说的没错！我试过了，非常感谢！

[yxlleslie]

那就好，^_^