java jframe透明代码

/**
 * @(#)TransparentFrame.java  v0.1.0  2007-10-21
 */
package ruislan.rswing.test;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.RoundRectangle2D;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.border.LineBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import com.sun.jna.examples.WindowUtils;

/**
 * Transparent JFrame use JNA
 * 
 * @author ruislan <a href="mailto:z17520@126.com"/>
 * @version 0.1.0