[JAVA3D] Resize a Box

[Ram�n Calso]

Hi all!!!! How can i resize a Box (com.sun.j3d.utils.geometry.Box) at execution time. I would like to pass the length, width, and height values by applet parameters.   The problem is that when i pass the parameters and click the update button, it create a new window with a box with the new dimensions but what i want is to update the current window and not to generate another window.   If I try to update all the tree:   Box miBox2=new Box(x.floatValue(),y.floatValue(),z.floatValue(),ap); miBox2.setBounds(bounds); objTrans.addChild(miBox2); objScale.addChild(objTrans); scene.addChild(objScale);   It gives me a java.lang.NullPointerException   what can I do????   Thanks in advance