Posted by BrickFarmer on Nov 30, 2010; 11:39am
URL: https://forum.jogamp.org/re-NEWT-Threading-Overview-tp1991718p1992182.html

I use something like this in my base class constructor.  note: I haven't ported this yet over to the very latest jogl2, so it's currently 'untested' although it has been working fine for 20+ canvases so far :)  As you can see from about 1:16 in this video:
http://www.youtube.com/watch?v=pXl3Q1r70O0
I have the main game canvas in the background and then 4 smaller canvases for building my models.

private static volatile GLContext sharedContext;
public CanvasBase(final String name, final AnimatorBase animator){
        super(caps, null, sharedContext, null);     //null for first creation
        this.name = name;
        this.animator = animator;
        glu = new GLU();
        glut = new GLUT();

        addGLEventListener(this);

        //delegate to child instances for any listeners
        setupListeners(this);

        //reset view as defined by child
        resetView();

        that = this;


        //System.out.println("CREATED: "+name+" CONTEXT: "+sharedContext);

        if (sharedContext == null) {
            sharedContext = getContext();
        }
    }