Hello, the LWJGL-based renderer was not included in the final 2.0 release because it needs to be updated to make it work with the core classes (PGL, PGraphicsOpenGL, etc), which went through some refactoring and cleanup in preparation for 2.0 final. It was fairly functional at around 2.0b8, but I didn't test the LWJGL's applet launcher at the time. Any help with the update work will be greatly appreciated! 

I've been tinkering with it and I have a guess. Might be useless, but I'll post anyway. The PGL allocateXXX methods are protected and the PGraphicsLWJGL constructor is trying to call them from a different package. Could this be part of the problem?

That shouldn't be the problem, notice that PGraphicsLWJGL instantiates pgl using processing.lwjgl.PGL, not the PGL class from processing.opengl, so the protected methods are inside the LWJGL package.

I probably might be doing something wrong to begin with, but this is what I'm getting. I have LWJGL and the P5LWJGL stuff set up as libraries in the sketchbook. Just tinkering in the PDE.

import org.lwjgl.LWJGLException;
import processing.lwjgl.*;

void setup() {
  try {
    size(400,400,"processing.lwjgl.PGraphicsLWJGL");
  } catch(Throwable ex) {}
  noLoop();
}

void draw() {
  println(g);
  println(processing.lwjgl.PGraphicsLWJGL.pgl);
}


Running that gives me this:

1. java.lang.IncompatibleClassChangeError: Expected non-static field processing.lwjgl.PGraphicsLWJGL.pgl
2. at processing.lwjgl.PGraphicsLWJGL.<init>(PGraphicsLWJGL.java:39)
3. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
4. at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
5. at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
6. at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
7. at processing.core.PApplet.makeGraphics(PApplet.java:1804)
8. at processing.core.PApplet.size(PApplet.java:1656)
9. at processing.core.PApplet.size(PApplet.java:1627)
10. at sketch_130617a.setup(sketch_130617a.java:25)
11. at processing.core.PApplet.handleDraw(PApplet.java:2245)
12. at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:243)
13. at processing.core.PApplet.run(PApplet.java:2141)
14. at java.lang.Thread.run(Thread.java:662)
15. processing.core.PGraphicsJava2D@7162e295
16. processing.opengl.PGL@26a3960
17. processing.core.PGraphicsJava2D@7162e295
18. processing.opengl.PGL@26a3960