import java.awt.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;
/**
- @version 1.33 2007-04-14
- @author Cay Horstmann */ public class ImageTest { public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { ImageFrame frame = new ImageFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }); } }
/**
-
A frame with an image component
*/
class ImageFrame extends JFrame
{
public ImageFrame()
{
setTitle("ImageTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);// add component to frame
ImageComponent component = new ImageComponent();
add(component);
}public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
}
/**
-
A component that displays a tiled image
*/
class ImageComponent extends JComponent
{
public ImageComponent()
{
// acquire the image
try
{
image = ImageIO.read(new File("blue-ball.gif"));
}
catch (IOException e)
{
e.printStackTrace();
}
}public void paintComponent(Graphics g)
{
if (image == null) return;int imageWidth = image.getWidth(this);
int imageHeight = image.getHeight(this);// draw the image in the upper-left corner
g.drawImage(image, 0, 0, null);
// tile the image across the componentfor (int i = 0; i * imageWidth <= getWidth(); i++)
for (int j = 0; j * imageHeight <= getHeight(); j++)
if (i + j > 0) g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j
* imageHeight);
}private Image image;
}