Java实现不规则窗体

效果图

package test;

import java.awt.Graphics;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

import com.sun.awt.AWTUtilities;

public class ImageOpacity extends JFrame{
	
	  int fw = 500;  
	    int fh = 500;  
	    ImageIcon icon = new ImageIcon("h.png");  
	  
	    public ImageOpacity() {  
	        JLabel backLabel = new JLabel() {  
	            @Override  
	            public void paint(Graphics g) {  
	                super.paint(g);  
	                icon.paintIcon(this, g, 0, 0);  
	            }  
	        };  
	        this.add(backLabel);  
	        setUndecorated(true); // 不装饰  
	  
	        
	        setSize(fw, fh); // 设置窗口大小  
	        AWTUtilities.setWindowOpaque(this, false);  //
	        setLocationRelativeTo(null);  //设置窗口居中  
	        setVisible(true);  
	    }  
	  
	    public static void main(String[] args) {  
	        ImageOpacity frame = new ImageOpacity();  
	        frame.setSize(500, 500);  
	        frame.setVisible(true);  
	    }  
}

PS:需要导包rt.jar，否则AWTUtilities.setWindowOpaque(this, false)报错。声明一下，这不是jdk啥问题，是缺包( 学习建议)