public class variables1
{
   static int x = 1;		// Global variable = class variable
                                // (Only 1 copy of this variable)

   static void f( )
   {
      int y = 4;		// Local variable

      System.out.printf("x = %d, y = %d\n", x, y );
   }


   public static void main(String[] argv)
   {
      int z = 2;		// Local variable

      System.out.printf("x = %d, z = %d\n", x, z );

      x = 777;             // Update the class (~= global) variable
      f( );
   }
}