Re: cannot load image

From:
Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups:
comp.lang.java.help
Date:
Tue, 18 Sep 2007 15:32:42 -0700
Message-ID:
<fmYHi.276983$BX3.219957@newsfe13.lga>
D.S.Whitworth@gmail.com wrote:

I cannot get my program to load an image and display it. I have read
several forums and help sites and have used all the code regarding
mediatracker, but for some reason, it simply will not load my images.
I have also tried multiple combinations of how I insert the file
name. Below is the code I got from a website that seems like it
should work, but it won't. I have Windows Vista on my computer...is
it possible that is part of the problem? Below is the code I cannot
get to work that I got from a website. Any help you could give me
would be appreciated.

import java.awt.*;
import java.awt.event.*;

public class Viewer extends Frame {
    private Image image;

    public Viewer(String fileName) {
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        image = toolkit.getImage(fileName);
        MediaTracker mediaTracker = new MediaTracker(this);
        mediaTracker.addImage(image, 0);
        try {
            mediaTracker.waitForAll();
        } catch (InterruptedException ie) {
            System.err.println(ie);
            System.exit(1);
        }
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        setSize(image.getWidth(null), image.getHeight(null));
        setTitle(fileName);
        setVisible(true);
    }

    public void paint(Graphics graphics) {
        graphics.drawImage(image, 0, 0, this);

    }

    public static void main(String[] args) {
        new Viewer(args[0]);
    }

}


D:

I don't see anything wrong with this and it works fine on my computer.
Check your image and make sure it doesn't have a problem.

I wouldn't use the MediaTracker, I would use the ImageIO class instead,
but this does work. Please see;

http://www.knutejohnson.com/

for some examples on how to load an view images with the three usual
methods.

You will find that it is easier if you draw the image on a component
other than the Frame/JFrame because when you set the size of frame it
includes the title bar and borders. So you will lose a small amount of
your image that way.

--

Knute Johnson
email s/nospam/knute/

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