Why am I getting ClassNotFoundExpection when I have properly imported said class and am looking at it in its directory?
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Published on 2012-05-31T04:27:42Z
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This is my Javac compiling statement:
javac -cp "C:\java\code\j3D\j3dcore.jar;C:\java\code\j3D\j3dutils.jar;C:\java\code\j3D\vecmath.jar" Simple.java
- compiles with no problems.
The three jar files (j3dcore, j3dutils, and vecmath) are the essential jar's for my program (or at least I am led to believe according to this official tutorial on J3D
For the record I ripped this code almost line from line from this pdf file.
- jar files are correctly located in referenced locations
When I run my Simple program, (java Simple) I am greeted with
Exception in thread "main" java.lang.NoClassDefFoundError: javax/media/j3d/Cavas3d Caused by: java.lang.ClassNotFoundExpection: javax.media.j3d.Canvas3D
Currently I am staring directly at this Canvas3D.class that is located within j3dcore.jar\javax\media\j3d\
wtfisthis.jpg
Here is the source code:
//First java3D Program
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.ColorCube;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.GraphicsConfiguration;
public class Simple extends Applet {
public Simple() {
setLayout(new BorderLayout());
GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
Canvas3D canvas3D = new Canvas3D(config);
add("Center", canvas3D);
BranchGroup scene = createSceneGraph();
scene.compile();
// SimpleUniverse is a Convenience Utility class
SimpleUniverse simpleU = new SimpleUniverse(canvas3D);
// This moves the ViewPlatform back a bit so the
// objects in the scene can be viewed.
simpleU.getViewingPlatform().setNominalViewingTransform();
simpleU.addBranchGraph(scene);
} // end of HelloJava3Da (constructor)
public BranchGroup createSceneGraph() {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
// Create a simple shape leaf node, add it to the scene graph.
// ColorCube is a Convenience Utility class
objRoot.addChild(new ColorCube(0.4));
return objRoot;
}
public static void main(String args[]){
Simple world = new Simple();
}
}`
- Did I import correctly?
- Did I incorrectly reference my jar files in my Javac statement?
- If I clearly see Canvas3D within its correct directory why cant java find it?
- The first folder in both j3dcore.jar and vecmath.jar is "javax". Is the compiler getting confused?
- If the compiler is getting confused how do I specify where to find that exact class when referencing it within my source code?
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