Java problem: Could not find main class HelloWorld
- by Newbie
I am new to java(a real novice).
I installed Java 1.7.0 in the following folder C:\Program Files\Java
The environment variable which I set are
CLASSPATH : C:\Program Files\Java\jdk1.7.0\jre\lib\rt.jar;
Path : C:\Program Files\Java\jdk1.7.0\bin;
JAVA_HOME : C:\Program Files\Java;
I have presented here the class names which are in my system.
Next I wrote a program(HelloWorld.java)
import java.io.*;
class HelloWorld
{
public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
When I am compiling using javac HelloWorld.java it is compiling fine.
But after I issue java HelloWorld I am encountering the below error
Error: Could not find main class HelloWorld
Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:198)
Caused by: java.lang.ClassNotFoundException: HelloWorld
at java.net.URLClassLoader$1.run(URLClassLoader.java:299)
at java.net.URLClassLoader$1.run(URLClassLoader.java:288)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:287)
at java.lang.ClassLoader.loadClass(ClassLoader.java:422)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:325)
at java.lang.ClassLoader.loadClass(ClassLoader.java:355)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:195)
After a bit of google search I found that may be something wrong in the environment variable. I tried to play with that but no luck.
I know that it may be a very simple thing for the real java developers(actually basic) but for me as of now no luck!
I even RESTARTED the machine and then again I tried to run but with same fate.
OS: Windows XP(Version 2002) with Service pack 3
Help needed .
Thanks .
