Error Message when running first java program

Question

Hi,
I am reading "Sams Teach Yourself Java 6 in 21 Days" by Rogers Cadenhead. I am having a problem with compiling the sample program in the first part of the book, "HelloUser" which is supposed to print out "Hello (my name - Matt)" when run in the command line.
I receive this error when trying to run it after having successfully compiled it (I enter java HelloUser while in correct folder):
Exception in thread "main" java.lang.NoSuchMethodError: main
I have correctly set the PATH and CLASSPATH settings for my PC (Windows XP). I am guessing that I need to define a "main" or something. I'm brand new to Java but am good with the scripting language PHP. Please tell me what I should do to correct this problem. Thanks in advance

Answer 1

Here is the code for the program:
public class HelloUser {
     public static void man(String[] arguments) {
          String username = System.getProperty("user.name");
          System.out.println("Hello " + username);
}Here is what I enter in the Command Line:
cd \JavaWork\j21work
javac HelloUser.java
java HelloUser
There are no problems up until I enter the last line (java HelloUser) to run the program. By the way, I using JDK 6 update 1 with Windows XP.