Problem running oustide of NetBeans

[CollinD]

Hi Everyone,

I have just finished an application that inverts colors in images (long story, but yes it has a purpose) and it runs fine in NetBeans when I hit F6. However, when I do a clean+build, and try to run the JAR via double-click, it has some interesting issues. Occasionally the JFrame GUI will display blank, other times it will be a static image that does not change when I click on it, mouse over, etc. When the GUI does work, I am able to select images to invert via the button using a JFileChooser. But when I click 'invert', the SwingWorker class that handles inversion instantly finishes, but does not actually perform the inversion.
In case it matters, the method for inverting the images is as follows:
Pull image from file into BufferedImage, invert pixels, write to png file using imageIO.write.

I have no idea why it is not working outside of NetBeans, any help would be much appreciated. Let me know if more information is needed.

Thanks!

[KevinWorkman]

Can you provide an SSCCE that demonstrates this behavior?

[CollinD]

Here's an example that does the exact same thing. First file is the main application, I removed the GUI and everything so now it just works from hardcoded paths

public class Main {
    public static void main(String[] args) {
        BufferedImage bi = ImageInverter.loadImageFromFile("c:\\HSG.tif");
        ImageInverter.invertBufferedImage(bi);
        java.io.File outfile = new java.io.File("c:\\temp\\HSG.png");
        try
        {
            javax.imageio.ImageIO.write(bi, "png", outfile);
        }
        catch (Exception ignore)
        {

        }
    }

}

my ImageInverter class:

import java.awt.image.*;
import javax.media.jai.*;
import java.util.*;
public class ImageInverter {
//hash table stores known values
private static Hashtable ht = new Hashtable();
 //invert colors of a buffered image
    public static void invertBufferedImage(BufferedImage bi)
    {
        int width = bi.getWidth(null);
        int height = bi.getHeight(null);
        int percent;
        int clr, newClr;
        for (int i = 0; i < width; i++)
        {
            for (int j = 0; j < height; j++)
            {
                clr = bi.getRGB(i, j);
                newClr = invertColor(clr);
                bi.setRGB(i, j, newClr);
            }
        }
    }
    //fetch image from file
    public static BufferedImage loadImageFromFile(String fname)
    {
        RenderedImage img = JAI.create("fileload", fname);
        BufferedImage bi = convertRenderedImage(img);
        img = null;
        return bi;
    }
    //fetch inverted color
    public static int invertColor(int clr)
    {
        //inverts color
        //format: 0xAARRGGBB
        long clor = 0;
        if (ht.containsKey(clr))
        {
            return (Integer)ht.get(clr);
        }
        int r, g, b, a;

        String val = Integer.toHexString(clr);
        //will not affect alpha values
        //fetch RGB
        a = Integer.parseInt(val.substring(0, 2), 16);
        r = Integer.parseInt(val.substring(2, 4), 16);
        g = Integer.parseInt(val.substring(4, 6), 16);
        b = Integer.parseInt(val.substring(6, 8), 16);
        //invert RGB
        r = 0xFF - r;
        g = 0xFF - g;
        b = 0xFF - b;
        //rebuild color int
        val = getColorString(a, r, g, b);
        clor = Long.parseLong(val, 16); //Workaround for a bug in Integer.parseInt
        //add color as known
        ImageInverter.ht.put(clr, (int)clor);
        return (int)clor;
    }
    //parse color int (0xAARRGGBB) into string
    public static String getColorString(int a, int r, int g, int b)
    {
                String val = "";
                String aString, bString, gString, rString;
                aString = fixLen(a);
                bString = fixLen(b);
                rString = fixLen(r);
                gString = fixLen(g);
                val = aString + rString + gString + bString;
                return val;
    }
    //helper
    public static String fixLen(int a)
    {
        String ret = Integer.toString(a, 16);
        if (ret.length() == 1)
            ret = "0" + ret;
        return ret;
    }
    //Found at http://www.jguru.com/faq/view.jsp?EID=114602
    public static BufferedImage convertRenderedImage(RenderedImage img) {
		if (img instanceof BufferedImage) {
			return (BufferedImage)img;
		}
		ColorModel cm = img.getColorModel();
		int width = img.getWidth();
		int height = img.getHeight();
		WritableRaster raster = cm.createCompatibleWritableRaster(width, height);
		boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
		Hashtable properties = new Hashtable();
		String[] keys = img.getPropertyNames();
		if (keys!=null) {
			for (int i = 0; i < keys.length; i++) {
				properties.put(keys[i], img.getProperty(keys[i]));
			}
		}
		BufferedImage result = new BufferedImage(cm, raster, isAlphaPremultiplied, properties);
		img.copyData(raster);
		return result;
	}
}

It's a very quick and dirty solution, but it is working when run through NetBeans. Has the exact same issue once built.

[CollinD]

I managed to get it to throw an error (still works in netbeans):

. . .\dist>java -jar SSCCE.jar
Exception in thread "main" java.lang.NoClassDefFoundError: javax/media/j
at sscce.ImageInverter.loadImageFromFile(ImageInverte r.java:37)
at sscce.Main.main(Main.java:18)
Caused by: java.lang.ClassNotFoundException: javax.media.jai.JAI
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 2 more

Some kind of problem finding JAI maybe?

[KevinWorkman]

Setting the class path

[CollinD]

Thanks for the quick and helpful info, Kevin. Took me a while to figure out how to properly set the classpath in NetBeans, but that did it. Apparently 'build projects in classpath' was checked, and that was the issue.