Binary to Decimal in java

/*

input = 10111

output = 23

*/

import java.util.Scanner;

class GFG {

public static void main (String[] args) {

//System.out.println("GfG!");

Scanner scan = new Scanner(System.in);

String binaryNumber = scan.next();

String srr[] = binaryNumber.split("");

int arr[] = new int[srr.length];

int len = arr.length-1;

for(int i=0;i<arr.length;i++){

    arr[len--] = Integer.parseInt(srr[i]);

}

int sum = 0;

for(int i = 0; i< arr.length  ; i++){

    sum += arr[i]*Math.pow(2,i);

}

System.out.println(sum);

}

}

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