Draw scaled image using Graphics.drawImage()

package javaswing;

import java.awt.Graphics;
import java.awt.Image;
import java.io.IOException;
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 http://java-buddy.blogspot.com/
 */
public class JavaTestSwing {
    
    static JFrameWin jFrameWindow;
    
    public static class MyComponent extends JComponent{

        @Override
        protected void paintComponent(Graphics g) {
            try {
                //prepare a original Image source
                Image image = ImageIO.read(this.getClass().getResource("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.setTitle("java-buddy.blogspot.com");
            this.setSize(300, 300);
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
            MyComponent myComponent = new MyComponent();
            this.add(myComponent);
        }
    }

    public static void main(String[] args){
        Runnable doSwingLater = new Runnable(){
            
            @Override
            public void run() {
                jFrameWindow = new JFrameWin();
                jFrameWindow.setVisible(true);
            }
        };
        
        SwingUtilities.invokeLater(doSwingLater);
        
    }

}

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.