Calculator.java

package springlab.SpringLabs;

import java.util.Scanner;

public class Calculator {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println("Type the operation");
		String op = input.nextLine();
		System.out.println("Type first integer");
		Double a = (double) input.nextInt();
		System.out.println("Type second integer");
		double b = input.nextDouble();
		input.close();		
		System.out.println("Here's your result");
		if (op.equals("addition")){
			System.out.println(addition(a, b));
		}else if(op.equalsIgnoreCase("subtraction")) {
			System.out.println(sub(a, b));
		}else if(op.equalsIgnoreCase("multiplication")) {
			System.out.println(multi(a, b));
		}else if (op.equalsIgnoreCase("division")) {
			System.out.println(div(a, b));
		}
		

	}
	public static double addition(double one,double two) {

		return	one + two;
	}
	public static double sub(double one,double two) {
		return one-two;
	}
	public static double div(double one,double two) {
		return one/two;
	}public static double multi(double a,double two) {
		return a*two;
	}
}