不规则窗体

Java准备进军桌面应用开发领域，所以不断加强程序开发的功能，而且添加了不规则窗体的实现技术。运行效果如下图所示。

实现代码如下：

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.ComponentAdapter;

import java.awt.event.ComponentEvent;

import java.awt.geom.Ellipse2D;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JSlider;

import com.sun.awt.AWTUtilities;

public class DemoFrame extends JFrame {

           private JSlider slider;

           JButton button;

           private screen screen_;

           public static void main(String args[]) {

                   EventQueue.invokeLater(new Runnable() {

                            public void run() {

                                     try {

                                               setDefaultLookAndFeelDecorated(true);

                                               DemoFrame frame = new DemoFrame();

                                               frame.setVisible(true);

                                     } catch (Exception e) {

                                               e.printStackTrace();

                                     }

                            }

                   });

           }

           public DemoFrame() {

                   super();

                   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                   initComponents();

           }

           private void initComponents() {

                   // 省略界面代码

           }

           private class ThisComponentListener extends ComponentAdapter {

                   public void componentResized(final ComponentEvent e) {

                            // 设置窗体使用Ellipse2D椭圆形窗体

                            AWTUtilities.setWindowShape(DemoFrame.this, new Ellipse2D.Float(0, 0, getWidth(), getHeight()));

                   }

           }

}