Question

I wrote a simple java program

package abc.def.ghi 
public class Foobar{


   public String printS(String s){
     System.Out.println(s);

 public static void main(String [] args){
   String s = args[0];
   Foobar foobar = new Foobar();
    foobar.printS(s);
}

Now I did javac Foobar.java

It created a class file

and then I did

java Foobar

Didnt worked

 java Foobar hi //args

Didnt worked

java -cp . abc.def.ghi.Main

DIdnt worked.

Error I am getting is:

Exception in thread "main" java.lang.NoClassDefFoundError: abc/def/ghi/Main
Caused by: java.lang.ClassNotFoundException: com.intel.hadoop.graphbuilder.conf.Main
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: com.intel.hadoop.graphbuilder.conf.Main.  Program will exit.

Answer 1

Did you put your .class files in the path (path to project)/abc/def/ghi/Foobar.class?

NoClassDefFoundError: abc/def/ghi/Foobar

Looks like you didn’t.