如何使JFrame窗口的最大化图标不能用？

pangolincn 2003-11-03 06:39:03

我在JFrame中用swing画了一个图形，为什么程序运行后没有显示出来，当改变窗口后，才显示？

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pangolincn 2003-11-03

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谢谢上面的回答
我还有一个问题
在菜单中我点击完后，菜单就会留在窗口中，怎么才能使菜单点击完后自动消失？

lwg2019 2003-11-03

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我给你一个例子！
主程序：
import javax.swing.UIManager;
import java.awt.*;

/**
* Title: 
* Description: 
* Copyright: Copyright (c) 2003
* Company: 
* @author not attributable
* @version 1.0
*/

public class Application1 {
boolean packFrame = false;

//Construct the application
public Application1() {
Frame1 frame = new Frame1();
//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 Application1();
}
}
JFrame：。。。。。。。。。。。。。。
import java.awt.*;
import java.awt.Graphics;
import java.awt.event.*;
import javax.swing.*;

public class Frame1 extends JFrame {
JPanel contentPane;
FlowLayout flowLayout1 = new FlowLayout();

//Construct the frame
public Frame1() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
this.setSize(new Dimension(400, 300));
this.setTitle("Frame Title");
}
catch(Exception e) {
e.printStackTrace();
}
}
public void paint(Graphics g)
{
g.drawString("233",23,34);
g.drawOval(40,60,80,120);
}

protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}

}

pangolincn 2003-11-03