Java tutorial
import java.awt.Dimension; import java.awt.Graphics; import java.awt.GridLayout; import java.awt.Image; import java.awt.LayoutManager; import java.net.URL; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JPanel; public class Main { public static void main(String[] args) throws Exception { JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); URL url = new URL("http://www.java2s.com/style/download.png"); Image image = ImageIO.read(url); ImagePanel ip = new ImagePanel(new GridLayout(4, 4, 20, 20)); ip.setPreferredSize(new Dimension(640, 480)); f.setContentPane(ip); f.pack(); f.setVisible(true); ip.setImage(new ImageIcon(image)); } } class ImagePanel extends JPanel { private Image image = null; ImagePanel(LayoutManager layout) { super(layout); } public void setImage(ImageIcon icon) { image = icon.getImage().getScaledInstance(this.getWidth(), this.getHeight(), Image.SCALE_DEFAULT); repaint(); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); if (image != null) { g.drawImage(image, 0, 0, getWidth(), getHeight(), null); } } }