Why won't this If statement work for the string?

import java.util.Scanner;

public class Methods {

/*
 * Compound interest Program Quarterly
 */


    public static void main(String[] args) {
        Scanner keyboard = new Scanner  (System.in);

        System.out.println("What is the Rate");
        int rate = keyboard.nextInt()/100;
        System.out.println("What is the Amount");
        int amount = keyboard.nextInt();
        System.out.println("How many years?");
        int years = keyboard.nextInt();

        keyboard.nextLine();
        System.out.println("How is it compounded? Press Q = Quarterly, A = Anually, S = SemiAnnualy, M = Monthly");

        String answer = keyboard.nextLine();

       int easy = amount*(1+(rate/years));
       int pow = 4 * years;


        if (answer == "/Q"){
            System.out.println("Your answer compounded Quarterly is: "  + Math.pow(easy,pow));

This is the code, but the if statement with String == "Q" doesn't work because when I press Q nothing happens? what's the issue?