java - Correct usage of TransformGroup -

i have started graphics assignment , first use of java3d. have started off attempting build chair (don't laugh @ following :p).

i wanted know if tell me correct usage pattern because pretty sure little bit off.

here have drawn:

as can see box seat , 4 cylinders legs.

here code used draw it:

public class chair {      public chair() {          simpleuniverse universe = new simpleuniverse();          branchgroup group = new branchgroup();          // main seat component          box box = new box(.39f,.03f,.37f, new appearance());          transformgroup seatgroup = new transformgroup();          transform3d transform = new transform3d();          vector3f vector = new vector3f(.0f, .0f, .0f);         transform.settranslation(vector);         seatgroup.settransform(transform);         seatgroup.addchild(box);          // legs of chair         cylinder leg1 = new cylinder(.07f, .45f);         cylinder leg2 = new cylinder(.07f, .45f);         cylinder leg3 = new cylinder(.07f, .45f);         cylinder leg4 = new cylinder(.07f, .45f);              //create new transformgroup, vector position each leg         transformgroup leg1group = new transformgroup();         transform3d legtransform = new transform3d();         vector3f leg1position = new vector3f(-.37f, -0.225f, -.35f);         legtransform.settranslation(leg1position);         leg1group.settransform(legtransform);         leg1group.addchild(leg1);          seatgroup.addchild(leg1group);          transformgroup leg2group = new transformgroup();         transform3d leg2transform = new transform3d();         vector3f leg2position = new vector3f(.37f, -0.225f, .35f);         leg2transform.settranslation(leg2position);         leg2group.settransform(leg2transform);         leg2group.addchild(leg2);          seatgroup.addchild(leg2group);          transformgroup leg3group = new transformgroup();         transform3d leg3transform = new transform3d();         vector3f leg3position = new vector3f(.37f, -0.225f, -.35f);         leg3transform.settranslation(leg3position);         leg3group.settransform(leg3transform);         leg3group.addchild(leg3);          seatgroup.addchild(leg3group);          transformgroup leg4group = new transformgroup();         transform3d leg4transform = new transform3d();         vector3f leg4position = new vector3f(-.37f, -0.225f, .35f);         leg4transform.settranslation(leg4position);         leg4group.settransform(leg4transform);         leg4group.addchild(leg4);          seatgroup.addchild(leg4group);              //add seat group main object group         group.addchild(seatgroup);               //stuff see universe//          color3f light1color = new color3f(.1f, 1.4f, .1f); // green light          boundingsphere bounds =          new boundingsphere(new point3d(0.0, 0.0, 0.0), 100.0);          vector3f light1direction = new vector3f(4.0f, -7.0f, -12.0f);          directionallight light1          = new directionallight(light1color, light1direction);          light1.setinfluencingbounds(bounds);          group.addchild(light1);          universe.getviewingplatform().setnominalviewingtransform();          // add group of objects universe          universe.addbranchgraph(group);          canvas3d canvas = new canvas3d(simpleuniverse.getpreferredconfiguration());         viewingplatform viewplatform = universe.getviewingplatform();         boundingsphere boundingsphere = new boundingsphere(new point3d(0f, 0f, 0f), 100f);         // add behaviour viewplatform, allowing user rotate, zoom, , straff scene         orbitbehavior orbitbehaviour = new orbitbehavior(canvas, orbitbehavior.reverse_all | orbitbehavior.stop_zoom);         orbitbehaviour.setschedulingbounds(boundingsphere);         viewplatform.setviewplatformbehavior(orbitbehaviour);      }      public static void main(string[] args) {          new chair();      }  } 

i want know if correct usage of groups seems there lot of duplication... if shed light on appreciate lot !!

this step towards learning java3d. taking homemade or per made script , being able read, understand , memorizing code can become faster , better programmer. define better take ones experience , force onto you. learning in order master need follow own methods. because every person different in way. follow foot steps of per's don't step directly in indent.