Simple Compilation and Running Program

In UNIX or Windoew 95/NT platforms which uses Sun's JDK, the standard wad to compile and run your Java program is: 
	% javac <file>.java        -- this outputs a new file .class
	% java <name> [<command line arguments>]
where file <file>.java contains the Java source code and is the name of the class containing the "main" method.
Example: 
         // Put this program in a file called Factorial.java
         // Then invoke
         //        % javac Factorial.java
         //        % java Factorial 
         //
         class Factorial {
           static int computeFactorial(int k) {
             if (k<0) return -1;
             else if (k == 0 || k == 1) return 1;
             else return k * computeFactorial(k-1);
           }
           public static void main(String[] args) {
             int n;
             n = Integer.parseInt(args[0]);
             for (int i = 1; i <= n; i++)
         	System.out.println
         	  (i + " factorial is " + computeFactorial(i));
           }
         }