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trouble running compiled file

rick simpson

Joined: Oct 15, 2008
Posts: 8

I'm stumped. I've written a couple classes that work find in Eclipse. I've successfully compiled them. However when I try running the class with main, I get the following message:

Exception in thread "main" java.lang.NoClassDefFoundError: Echo (wrong name: Test/Echo)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Could not find the main class: Echo. Program will exit.

When I'm in the dir with the Echo.class file, I'm typing java -cp . Echo

Any help and guidence appreciated.
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24195

Assuming Echo.class is in a directory "Test":

cd ..
java -cp . Test.Echo

You need to let Java find the class from the root of the package hierarchy.

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