Compiling classes in files of a different name

Question

Right I feel liek a right dumbass here but I'm having some trouble.
I want to compile a class in a file of a different name i.e. it's filename for example is Test.java, the class is called class TestWorks and main class is
public class BirthdayProb
     public static void main(String[] args){
     but in the compiler when I type javac TestWorks.java I get a file not found error.
Please help :)

Answer 1

all publicly declared classes must be placed inside a file with the exact same name (case sensitive) as the public class. I.e.
public class Test { } must be placed inside Test.java
public class NumbNuts{ } must be placed inside NumbNuts.java
public class IHateVisualBasic{ } must be placed inside IHateVisualBasic.java
If you want to have more than one class inside of a single file, then only one class may be declared public and the file must be named after said public class:
public class Ned { }
class Dave { }
class Herman {}
class ThisSucks { }must all be placed inside a file called Ned.java
Help?