Compiles but java.lang.NoClassDefFoundError when I try to run it

[manavo11]

When I compile my code, I do this :

C:\Program Files\Java\jdk1.5.0\bin>javac c:\java\hello.java

But when I go to run the class file I get the following error :

C:\Program Files\Java\jdk1.5.0\bin>java c:\java\hello
Exception in thread "main" java.lang.NoClassDefFoundError: c:\java\hello

The code I have made (very advanced ):

class Hello {
	public static void main(String [] args) {
		System.out.println("Hello world");
	}
}

Any ideas?

Thanks