task2.java

import java.io.IOException;
import java.util.*;

public class task2 {
    public static void main (String [] args) throws IOException {
        int a;
        int b;
        String y;
        String x;
        Scanner input = new Scanner(System.in);

        System.out.println("Please enter number A:");
        a = input.nextInt();

        System.out.println("\nPlease enter number B:");
        b = input.nextInt();

        System.out.println("\nLastly, enter A if you wish it to be the dividor and/or subtractor, or if you wish it to be B, please enter B :");             //stops running properly here...
        y=input.next();

        System.out.println("\nWhat would you like to do? Multiply (*), Divide (/), Subtract (-) or  Add   (+)? Please enter the symbol of which process you would like to have completed:");
        x=input.next();

        if (y.equals("B")) {

            if (x.equals("*")) {
                System.out.println("\nThe product of these numbers is:" + a*b);}
            else
                if (x.equals("/")) {
                    System.out.println("\nThe quotient of these numbers is:" + a/b);}
                else
                    if (x.equals("+")) {
                        System.out.println("\nThe sum of these numbers is:" + a+b);}
                    else
                        if (x.equals("-")) {
                            System.out.println("\nThe difference of these numbers is:" + (a-b));}}

        else
            if (y.equals("A")){

                if (x.equals("*")) {
                    System.out.println("\nThe product of these numbers is:" + b*a);}
                else
                    if (x.equals("/")) {
                        System.out.println("\nThe quotient of these numbers is:" + b/a);}
                    else
                        if (x.equals("+")) {
                            System.out.println("\nThe sum of these numbers is:" + b+a);}
                        else
                            if (x.equals("-")) {
                                System.out.println("\nThe difference of these numbers is:" + (b-a));
                            }
            }
    }
}