NoClassDefFoundError

[Red Smith]

I am trying to run a very simple class.

I put it in "package myJava;"

it is in the directory myJava which is below my home directory (/home/redsmith).

The CLASSPATH has in it:
CLASSPATH=:/home/redsmith:/home/redsmith/myJava:.:/home/redsmith/myJava/jarFiles/junit-4.5.jar

this is the complete "program":

// package statement has to precede all others except comments
package myJava;
 
import org.junit.Test;
 
import junit.framework.TestCase;
 

 
class testJunit extends TestCase {
 
   public static void main(String args)
   {
      try 
      {
         System.out.println("starting testJunit");
      }
      catch (Exception e)
      {
         System.out.println("Got an exception!!!");
         System.out.println(e);
      }
   }
 

}

and this is the output:

CLASSPATH=:/home/redsmith:/home/redsmith/myJava:.:/home/redsmith/myJava/jarFiles/junit-4.5.jar
Exception in thread "main" java.lang.NoClassDefFoundError: testJunit (wrong name: myJava/testJunit)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

[Ulf Dittmer]

Try removing "/home/redsmith/myJava" from the classpath. Also, what's the first colon doing in there (right after the "CLASSPATH=")? Remove that, too.

[Red Smith]

Originally posted by Ulf Dittmer:
Try removing "/home/redsmith/myJava" from the classpath. Also, what's the first colon doing in there (right after the "CLASSPATH=")? Remove that, too.

The extra : came from having CLASSPATH=${CLASSPATH}:.... and CLASSPATH was empty. I removed the extra colon and I removed the directory as you suggested. I still get the error:

go.zsh
CLASSPATH=/home/redsmith:.:/home/smithre/myJava/jarFiles/junit-4.5.jar
Exception in thread "main" java.lang.NoClassDefFoundError: testJunit (wrong name: myJava/testJunit)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

the Z-shell file that I am executing has in it:

#!/bin/zsh
 

export CLASSPATH=${HOME}:.:${HOME}/myJava/jarFiles/junit-4.5.jar
 
echo "CLASSPATH=${CLASSPATH}"
 
PGM=testJunit
 
java ${PGM}

[Henry Wong]

try changing PGM to myJava.testJunit

Henry

[Red Smith]

Originally posted by Henry Wong:
try changing PGM to myJava.testJunit

Henry

I made that change and the error changed:

go.zsh
CLASSPATH=/home/redsmith:.:/home/redsmith/myJava/jarFiles/junit-4.5.jar
Exception in thread "main" java.lang.NoSuchMethodError: main

[ August 12, 2008: Message edited by: Red Smith ]

[Henry Wong]

The main() method takes a string array -- you have it defined as a single string parameter.

Henry

[Red Smith]

Originally posted by Henry Wong:
The main() method takes a string array -- you have it defined as a single string parameter.

Henry

D'oh!!

Thanks!