Convert binary to decimal in java using recursion

Let’s learn convert binary to decimal in java using recursion.

Convert binary to decimal in java using recursion

Now let’s learn recursion program to convert binary to decimal.

public class BinaryToDecimalRecursion
{
   static int binaryToDecimal(String strBinary, int a) 
   {
      int size = strBinary.length(); 
      if(a == size - 1)
         return strBinary.charAt(a) - '0'; 
      return((strBinary.charAt(a) - '0') << (size - a - 1)) + binaryToDecimal(strBinary, a + 1); 
   }
   public static void main(String[] args) 
   {
      String binaryNumber = "1111"; 
      int n = 0;
      System.out.println("Convert binary to decimal using recursion: ");
      System.out.println(binaryToDecimal(binaryNumber, n));
   }
}

Output:

Convert binary to decimal using recursion: 15