java3d applet 入门小案例 import java.applet.Applet; import java.awt.*; import com.sun.j3d.utils.applet.MainFrame; import java.awt.BorderLayout; import com.sun.j3d.utils.universe.SimpleUniverse; import javax.media.j3d.*; import javax.vecmath.*; import com.sun.j3d.utils.behaviors.mouse.*; import com.sun.