class PrimoJava{ public static void main( String[ ] aaa ){ final double pi; stampa( "Pi greca = " ); pi = 4* Math.atan( 1.0 ); stampa( "" + pi ); stampa(""); } private static void stampa( String testo ){ if ( testo.equals("") ) System.out.println(); else System.out.print( testo ); } }