Image size
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.image.ImageObserver;
import java.net.URL;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ImageSize extends JPanel{
private static Image image;
public ImageSize(URL url) {
image = Toolkit.getDefaultToolkit().getImage(url);
rightSize();
}
private void rightSize() {
int width = image.getWidth(this);
int height = image.getHeight(this);
if (width == -1 || height == -1)
return;
addNotify();
System.out.println("Image width: "+width);
System.out.println("Image height"+height);
}
public boolean imageUpdate(Image img, int infoflags, int x, int y,
int width, int height) {
if ((infoflags & ImageObserver.ERROR) != 0) {
System.out.println("Error loading image!");
System.exit(-1);
}
if ((infoflags & ImageObserver.WIDTH) != 0
&& (infoflags & ImageObserver.HEIGHT) != 0)
rightSize();
if ((infoflags & ImageObserver.SOMEBITS) != 0)
repaint();
if ((infoflags & ImageObserver.ALLBITS) != 0) {
rightSize();
repaint();
return false;
}
return true;
}
public void update(Graphics g) {
paint(g);
}
public void paint(Graphics g) {
Insets insets = getInsets();
g.drawImage(image, insets.left, insets.top, this);
}
public static void main(String[] args) throws Exception {
String url = "http://www.java2s.com/style/logo.png";
new ImageSize(new URL(url));
}
}
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