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HowTo on the eclipse ? (Read 2114 times)
Classiclll
HowTo on the eclipse ?
Apr 30th, 2007, 5:03pm  
Hello,

I am trying to build a library for Processing, and test it on the eclipse.
When I was going to register dispose() in a constructer, I received the following exception.

Code:
java.lang.NullPointerException
  at processing.core.PApplet.registerNoArgs(PApplet.java:737)
			  :
java.lang.RuntimeException: Could not register dispose + () for wrj4P5.Wrj4P5@c53dce
  at processing.core.PApplet.die(PApplet.java:2292)
			  :


Code:
import processing.core.*;
import wrj4P5.*;
public class TestImpl extends PApplet { 
  public Wrj4P5 wii=new Wrj4P5(this);
  public void setup() {
 } 
  public void draw() {
    line(10,10,160,120); 
 }

Code:
package wrj4P5;
import processing.core.*;
public class Wrj4P5 {
  PApplet parent;
  public Wrj4P5(PApplet parent) {
    this.parent = parent;
    parent.registerDispose(this);
  }
  public void dispose() {
  }
}


Will the approach that I take be wrong? If there is good advice to improve this situation, I ask.

Thanks
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fjen
Re: HowTo on the eclipse ?
Reply #1 - May 1st, 2007, 8:03am  
Code:

import processing.core.*; 
import wrj4P5.*; 
public class TestImpl extends PApplet {  
  public Wrj4P5 wii;
  public void setup() { 
	wii=new Wrj4P5(this);
 }  
  public void draw() { 
    line(10,10,160,120);  
 }
}


you should make sure that you put all initialization code inside a function. setup() is a good place for example.

F
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Classiclll
Re: HowTo on the eclipse ?
Reply #2 - May 1st, 2007, 2:03pm  
Thank you fjen.

That was my one-sided belief.

I understand now.
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