WebStart Resource NullPointerException

[xindon]

Okay, problem is solved.

Have a look at my WebStart Milkshape3D model loader
-> http://bloody-blades.de/jnlp/ms3dloader.jnlp

(RightClick -> Save As...  and then run it using javaws)



If you're receiving NullPointerExceptions when accessing resources in a WebStart app, here's my post. The solution is written in the next post. Good look

Hey,

I'm trying to start my Milkshape3D loader as a webstart application. The jars are all signed and actually everything works well.
But I can't load resources from the jar.

My resource loader looks like this:

public class ResourceLoader {

	public URL loadResource(String resource) {

		if (resource.startsWith("/"))
			resource = resource.substring(1);

		return this.getClass().getResource(resource);
	}

	public InputStream loadResourceAsStream(String resource) {

		try {
			return this.loadResource(resource).openStream();
		} catch (Exception e) {
			return null;
		}

	}
}

And in my game code, I call this for example:

MS3DModel g36c = new MS3DModel(resourceLoader.loadResourceAsStream("models/g36c.ms3d"));

The weird thing is, that in Eclipse it works, but in Webstart a NullPointerException is thrown.

Any ideas?

Thank you very much,
Tim


My package structures are as following:

ms3dloader
    -sources (main.java, timer.java, etc.)
ms3dloader.data
    -ResourceLoader.java
ms3dloader.data.models
     -g36c.ms3d
ms3dlaoder.data.textures
     -g36c.bmp

[xindon]

Duh....

I used ResourceLoader as a static object, that was the problem.

Have a look: http://bloody-blades.de/jnlp/ms3dloader.jnlp

[Evil-Devil]

The JNPL does not work
Only displays a text message in my browser.

Tim Biedert  Loading and rendering of Milkshape3D Models in Java Milkshape3D Models

[oNyx]

Missing Mime-Type. This tutorial covers that bit, too:

http://www.cokeandcode.com/webstarthowto

RMB->save->doubleclick should work tho.

[Evil-Devil]

Missing Mime-Type. This tutorial covers that bit, too:

http://www.cokeandcode.com/webstarthowto

RMB->save->doubleclick should work tho.

Yea, i forgot

@Topic: Nice. Seems that we have allmost the main model formats with an example in the boards.

[xindon]

Thanks.
But note animation is not implemented (yet). I wrote this loader in C++ a while ago and now I just tried to convert it to Java and make a WebStart application out of it.

When I'm at home, I'll create a web page for my loader with the sources on it.

Btw, I made the G36C model myself

Seems that we have allmost the main model formats with an example in the boards.

Maybe someone should create a sticky Thread or a Wikipage with all the examples on it...

[Evil-Devil]

The wiki will receive an update soon...and then there can plenty content added. Just need some more time and matzon have to update it

[xindon]

Check this out:
http://bloody-blades.de/?page_id=3

I ported the first 25 NeHe lessons to Java and made WebStart Apps!

(with working MIME type!  )

[Evil-Devil]

All working with 1.0 betas?

[xindon]

Yup, currently I'm using 1.0beta2.

But I just found out lesson 17 and later doesn't work on Linux.

I receive "X Error - serial:19, error_code: BadValue(integer parameter our of rance for operation), request_code:1, minor_code:0"

I'm quite sure the problem is the DisplayMode. In lesson 17 I started including Fullscreenmode.

Up to lesson 16 I used this to create the Display:

Display.setDisplayMode(new DisplayMode(640, 480));
Display.setVSyncEnabled(true);
Display.setTitle(this.windowTitle);
Display.create();

Since lesson 17 I'm using this:

DisplayMode modes[] = Display.getAvailableDisplayModes(); // Get the available display modes
DisplayMode selection = new DisplayMode(0, 0);
for (int i = 0; i < modes.length; i++) {
	if (modes[i].getWidth() == 640 && modes[i].getHeight() == 480 && (modes[i].getBitsPerPixel() == 24 || modes[i].getBitsPerPixel() == 32)) {
		selection = modes[i];
		break;
	}
}
Display.setDisplayMode(selection); // Set the display mode
Display.setVSyncEnabled(true); // Enable VSync
Display.setTitle(this.windowTitle);
Display.create();

When I'm at home I'll try to change the line DisplayMode selection = new DisplayMode(0, 0); to DisplayMode selection = new DisplayMode(640, 480);, so there's a default window mode.

I  think you cannot emumerate the resolutions in Linux. I had the same problem using Java/AWT. There's an example on the Sun / Java3D website, and it only returned the current resolution (1280x1024). In windows it returns everything supported by the graphics card.

Bug?

Regards,
xindon

[Evil-Devil]

For fixed window sizes you can use the getAvailableDisplayModes method from the util package.

IMO that should work quite good

[xindon]

For fixed window sizes you can use the getAvailableDisplayModes method from the util package.

IMO that should work quite good

What do you mean by fixed window sizes?

Is it possible that Linux doesn't support a fullscreen mode like in Windows? That you can only have fullscreen, if the window size is the same as the desktop size.

Regards

[Evil-Devil]

With "fixed" size I only mean your if conditional that looks for 640*480 * 24 / 32

With the function you don't need the if conditional.
@linux: don't know. As long as ATI do not give out quality display drivers, my linux experience will lack more and more.

[xindon]

Ah okay, but maybe in later projects I'll use your advice

But for now I first need to fix the Linux bug, tonight when I'm at home.


Brrrr, changing 10 tutorials, creating new jars, signing them... *argh*

[Evil-Devil]

Brrrr, changing 10 tutorials, creating new jars, signing them... *argh*

What about build files like ANT? ^^