Why does Ant say “NoClassDefFound” when my JAR is on the classpath?

Question

I am using Java 1.6, Eclipse, and Ant.

The following is my target for creating a jar file and running it:

Answer 1

You've set the compile classpath but the App.jar does not include your libs (only the classes you compiled) or a manifest classpath.

You'll need to do the following:

    
    
      
    
    
        
            
            .
        
    

See also ant manifestclasspath task