Java file is compiling but not running.

Hi All,
Im new to java and i wrote a new java program which will display hello world. I named the java file as Hello.Java and the file resides in my D drive. When i compiled it it worked fine. But when i try to run it i got an error as below,
Exception in thread "main" java.lang.NoClassDefFoundError: Hello
Can someone help me with this error?

Can we see the source code?

Please find the code below
public class Hello { public static void main(String args[]) { System.out.println("Hello World"); } }

Is the name of the source file "Hello.java"? If not, it should be.

How are you running the code? The command should be something like "java -cp . Hello" while you are in the same directory as the Hello.class file.

Yes i run from command line what does cp means?

java cp option

Have you tried it?

Hi All,

Thanks a lot to all of the friends here after setting the class path my code worked fine.