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

Also read – abstraction in java