Java Graphics_8

package com.han;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Image;import java.awt.Toolkit;import java.net.URL;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;/** * 相比上一个例子（Graphics_7）而言：拖动窗口调整大小时，没有白光闪烁 * @author HAN * */@SuppressWarnings("serial")public class Graphics_8 extends JFrame {static CanvasPanel myPanel;public Graphics_8() {// TODO Auto-generated constructor stubmyPanel = new CanvasPanel();getContentPane().add(myPanel);JButton button = new JButton("HAN Gaowen");myPanel.add(button);}class CanvasPanel extends JPanel {public void paint(Graphics g) {super.paint(g);Graphics2D g2 = (Graphics2D) g;URL imgURL = this.getClass().getResource("/images/Lighthouse.jpg");Image image = Toolkit.getDefaultToolkit().getImage(imgURL);g2.drawImage(image, 0, 0, this.getWidth(), this.getHeight(), this);}}/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubGraphics_8 frame = new Graphics_8();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setTitle("绘制图片");frame.setSize(440, 300);frame.setVisible(true);System.out.println(myPanel.getSize());}}