Java SE (Java Platform, Standard Edition)

Hi, am new to java and am using eclipse. Have downloaded all the files required and have built a path using them, ie. j3dcore.jar, j3dutils.jar and vecmath.jar.

Problem is, i still cant run any example programs.

things like;

import com.sun.j3d.utils.universe.SimpleUniverse;

import com.sun.j3d.utils.geometry.ColorCube;

import javax.media.j3d.BranchGroup;

import com.sun.j3d.utils.applet.MainFrame;

are flagged, and all it says are things like

Access restriction: The type MainFrame is not accessible due to restriction on required library C:\Program Files\Java\jre6\lib\ext\j3dutils.jar


please help.

Thank youuu