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.