question: protected void init ( ) { GraphicsConfigTemplate3D template = new GraphicsConfigTemplate3D ( ) ; GraphicsEnvironment env = GraphicsEnvironment . getLocalGraphicsEnvironment ( ) ; GraphicsDevice device = env . getDefaultScreenDevice ( ) ; GraphicsConfiguration config = device . getBestConfiguration ( template ) ; canvas = new Canvas3D ( config ) ; canvas . setSize ( new Dimension ( DEFAULT_DIMENSION , DEFAULT_DIMENSION ) ) ; objRootBG = new BranchGroup ( ) ; objRootBG . setCapability ( Group . ALLOW_CHILDREN_EXTEND ) ; constructWorld ( objRootBG ) ; }
target:  Set up the canvas and the universe.