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Index › Programming Questions & Help › Syntax Questions › nullPointerExpt from getCodeBase()
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nullPointerExpt from getCodeBase() (Read 1248 times)
Classiclll
nullPointerExpt from getCodeBase()
Aug 4th, 2007, 5:08pm  
Any suggestion will be welcomed.
Thank you.

[code]
void setup() {
 println(getCodeBase());
}  
[code]

java.lang.NullPointerException
at java.applet.Applet.getCodeBase(Applet.java:146)
at Temporary_1161_9684.setup(Temporary_1161_9684.java:9)
at processing.core.PApplet.handleDisplay(PApplet.java:1285)
at processing.core.PGraphics.requestDisplay(PGraphics.java:680)
at processing.core.PApplet.run(PApplet.java:1454)
at java.lang.Thread.run(Thread.java:552)
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fjen
Re: nullPointerExpt from getCodeBase()
Reply #1 - Aug 4th, 2007, 11:43pm  
try something like this:

Code:

void setup ()
{
    if ( online ) {
	  // only works when run online, in a browser
	  println( "online:" );
	  println( getCodeBase() );
    } else {
	  // locally run, processing-ide, application
	  try{
		println( "local:" );
		println( new URL( "file:"+sketchPath("") ) );
	  } catch ( Exception e ) { 
		e.printStackTrace(); 
	  }
    }
}


F
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Classiclll
Re: nullPointerExpt from getCodeBase()
Reply #2 - Aug 5th, 2007, 3:27am  
Thank you for your Many advice, fjen !
I'will follow your advice, and will report the result.
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Classiclll
Re: nullPointerExpt from getCodeBase()
Reply #3 - Aug 5th, 2007, 5:37am  
The advice of fjen was perfect.Thank you, fjen.
But my problem is still existing.

I'm trying to make some Library, and wish to access a image file as a library's resource.
*Can I do that thing?
*If can, where the image file is to be placed?

thank you
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Classiclll
Re: nullPointerExpt from getCodeBase()
Reply #4 - Aug 5th, 2007, 9:17am  
After a web survey, I can solve my problem, as following.
It seem like to be well, both on eclipse, pde and application.
Thank you.

URL resource = null;
Image img = null;
if (waitingImg==null) {
 resource = this.getClass().getResource("WiiStart.jpg");
 if (parent.online && resource!=null) {
          img = parent.getImage(resource);
  }  else if (resource!=null) {
          img = Toolkit.getDefaultToolkit().getImage(resource);
  }
  if (img!=null) waitingImg = parent.loadImageSync(img);
}
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fry
Re: nullPointerExpt from getCodeBase()
Reply #5 - Aug 5th, 2007, 8:06pm  
the whole point of the "data" folder and the loadImage() command are to avoid situations like this. just put the image in the data folder and use loadImage(), which will work in both cases. for more about the data folder and setting up sketches, read help -> getting started.

if you need a java image instead of a PImage, see examples elsewhere on the board for creating an Image object from a PImage.
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Classiclll
Re: nullPointerExpt from getCodeBase()
Reply #6 - Aug 6th, 2007, 6:22am  
Thank you, fry.
My target is loading PImage from my lib's jar file, other than the 'data' folder.
Would you suggest me a more elegant way ?, if exists.
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fry
Re: nullPointerExpt from getCodeBase()
Reply #7 - Sep 12th, 2007, 2:01pm  
use the java methods getClass().getResourceAsStream() to pull things out of the library jar files.
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Classiclll
Re: nullPointerExpt from getCodeBase()
Reply #8 - Sep 12th, 2007, 4:58pm  
thanks, i'll try it.
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