public static void main(String[] args) { // Declare classes Functions functions = new Functions(); Scanner keyboard = new Scanner(System.in); // Input data from keyboard System.out.print("Enter length: "); functions.length = keyboard.nextInt(); System.out.print("Enter width: "); functions.width = keyboard.nextInt(); System.out.print("Enter height: "); functions.height = keyboard.nextInt(); System.out.print("Enter radius: "); functions.radius = keyboard.nextInt(); // Call the Functions class functions.areaLength(); functions.areaTriangle(); functions.areaCircle(); functions.volumeCube(); }