public class Main {
	interface Calc {
		void suma(int a, int b);
		void resta(int a, int b);
		void multiplicacion(int a, int b);
		void division(int a, int b);
	}

	public static void main(String[] args) {
		Calc calc = new Calc() {
			@Override
			public void suma(int a, int b) {
				System.out.println("Suma:");
				System.out.println("\tResult: " + (a+b));
			}

			@Override
			public void resta(int a, int b) {
				System.out.println("Resta:");
				System.out.println("\tResult: " + (a-b));
			}

			@Override
			public void multiplicacion(int a, int b) {
				System.out.println("Multiplicacion:");
				System.out.println("\tResult: " + (a*b));
			}

			@Override
			public void division(int a, int b) {
				System.out.println("Division:");
				if(b!=0) {
					System.out.println("\tResult: " + (a/b));
				}else {
					System.err.println("\tError!");
				}
			}
		};
		calc.suma(1,3);
		calc.resta(1,3);
		calc.division(1,3);
		calc.multiplicacion(1,3);
	}
}