JavaCalculator (Problem)

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 operation =Scanner3.next();

		if (operation == ("+")){

			int answer = (firstInteger+secondInteger);

			System.out.print(answer);

		}

		if (operation == ("-")) {

			int answer = (firstInteger-secondInteger);

			System.out.print(answer);

		}

		if (operation == ("*")) {

			int answer = (firstInteger*secondInteger);

			System.out.print(answer);


		}

		if (operation == ("/")) {

			int answer = (firstInteger/secondInteger);

			System.out.print(answer);


			}


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

}