multiply two numbers without using arithmetic operators in java

1import java.util.Scanner;
2public class MultiplyWithoutArithmeticOperators
3{
4   static int multiplyNumber(int num1, int num2)
5   {
6      int output = 0;
7      boolean boolNegative = (num1 < 0 && num2 >= 0) || (num2 < 0 && num1 >= 0);
8      boolean boolPositive = !boolNegative;
9      num1 = Math.abs(num1);
10      for(int a = 0; a < num1; a++)
11      {
12         if(boolNegative && num2 > 0 || boolPositive && num2 < 0)
13         {
14            output -= num2;
15         }
16         else
17         {
18            output += num2;
19         }
20      }
21      return output;
22   }
23   public static void main(String[] args)
24   {
25      Scanner sc = new Scanner(System.in);
26      System.out.print("Please enter first number: ");
27      int num1 = sc.nextInt();
28      System.out.print("Please enter second number: ");
29      int num2 = sc.nextInt();
30      System.out.println("Multiplication of two numbers: " + multiplyNumber(num1, num2));
31      sc.close();
32   }
33}