Java Calculator (Updated)

package javaCalculator;

import java.util.Scanner;

public class Calculator {

	public static void main (String [] args) {


		System.out.println("Please enter your first number");
		Scanner Scanner1 = new Scanner (System.in);
		int firstInteger = Scanner1.nextInt();


		System.out.println("Please enter your second number");
		Scanner Scanner2 = new Scanner (System.in);
		int secondInteger = Scanner2.nextInt();

		System.out.println("Please enter the operation");
		Scanner Scanner3 = new Scanner (System.in);
		String userOperation = Scanner3.next();
		String additionOperation = "+";
		String subtractionOperation = "-";
		String multiplacationOperation = "*";
		String divisionOperation = "/";
		boolean addition = userOperation.equals(additionOperation);
		boolean subtract = userOperation.equals(subtractionOperation);
		boolean multiplacation = userOperation.equals(multiplacationOperation);
		boolean division = userOperation.equals(divisionOperation);

		int answer = 0;
		if (addition){

			answer = (firstInteger+secondInteger);

			System.out.print(answer);

		}else{

		if (subtract) {

			answer = (firstInteger-secondInteger);

			System.out.print(answer);

		}else{

		if (multiplacation) {

			answer = (firstInteger*secondInteger);

			System.out.print(answer);


		}else{

		if (division) {

			answer = (firstInteger/secondInteger);



			}else{


		System.out.print(answer);

			}
	Scanner1.close();
	Scanner2.close();
	Scanner3.close();
	}

}}}}