Thursday, November 29, 2012

Draw scaled image using Graphics.drawImage()

Draw scaled image using Graphics.drawImage()

package javaswing;

import java.awt.Graphics;
import java.awt.Image;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

 * @web
public class JavaTestSwing {
    static JFrameWin jFrameWindow;
    public static class MyComponent extends JComponent{

        protected void paintComponent(Graphics g) {
            try {
                //prepare a original Image source
                Image image ="duke.png"));

                int w = image.getWidth(null);
                int h = image.getHeight(null);
                g.drawImage(image, 0, 0, w, h, null);
                int scale = 2;
                g.drawImage(image, 0, h, w*scale, h*scale, null);
            } catch (IOException ex) {
                Logger.getLogger(JavaTestSwing.class.getName()).log(Level.SEVERE, null, ex);

    public static class JFrameWin extends JFrame{
        public JFrameWin(){
            this.setSize(300, 300);
            MyComponent myComponent = new MyComponent();

    public static void main(String[] args){
        Runnable doSwingLater = new Runnable(){
            public void run() {
                jFrameWindow = new JFrameWin();


We can also call drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer) method to draw part of the image.

No comments:

Post a Comment