ImageSize.java Source code

Introduction

Here is the source code for ImageSize.java

Source

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));

    }
}