第6周作业-图像缩放显示

图像缩放显示   Application版 和 Applet 版！！

/**     * 功能：缩放显示图像gif * 著：书中[例9-13]  P201 (Applet版)    * 作者：李家华    * 时间：2014-04-08     * 博客：blog.csdn.net/lhcapricorn   * */  import java.awt.Graphics;import java.awt.Image;import javax.swing.*;public class ShowImg extends JApplet{Image img1;public void init(){img1 = getImage(getCodeBase(),"img.gif"); }public void paint(Graphics g){int w =img1.getWidth(this);int h =img1.getHeight(this);g.drawImage(img1, 5, 10, this);g.drawImage(img1,15,40,w/2,h/2,this);g.drawImage(img1, 5, 100, w*2,h*2,this);}}

/**     * 功能：缩放显示图像gif * 说明：Application版  * 作者：李家华    * 时间：2014-04-08     * 博客：blog.csdn.net/lhcapricorn   * */  import java.awt.Container;import java.awt.Graphics;import java.awt.Image;import java.awt.MediaTracker;import java.awt.Toolkit;import javax.swing.*;public class ShowImgApp {// static Image img1;  public static void main(String arg[]){ImageFrame frame = new ImageFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);frame.setLocationRelativeTo(null);}}class ImageFrame extends JFrame{public ImageFrame(){setSize(WIDTH,HEIGHT);setTitle("缩放显示图像");//JPanel panel = new JPanel();//this.add(panel);ImagePanel panel = new ImagePanel();Container contentPane =getContentPane();contentPane.add(panel);}public static final int WIDTH=400;public static final int HEIGHT=600;class ImagePanel extends JPanel{public ImagePanel(){image = Toolkit.getDefaultToolkit().getImage("img200.gif");MediaTracker tracker = new MediaTracker(this);tracker.addImage(image,1);try {tracker.waitForID(1);}catch (InterruptedException exception){}}public void paintComponent(Graphics g){super.paintComponent(g);int w = image.getWidth(this);int h = image.getHeight(this);g.drawImage(image,5,10,null );  g.drawImage(image,150,40,w/2,h/2,this);  g.drawImage(image,10,200,w*2,h*2,this);  }private Image image;}}