How to convert a Binary String to a base 10 integer in Java

Question

I have an array of Strings that represent Binary numbers (without leading zeroes) that I want to convert to their corresponding base 10 numbers. Consider:

bi         


        

Answer 1

static int binaryToInt (String binary){
    char []cA = binary.toCharArray();
    int result = 0;
    for (int i = cA.length-1;i>=0;i--){
        //111 , length = 3, i = 2, 2^(3-3) + 2^(3-2)
        //                    0           1  
        if(cA[i]=='1') result+=Math.pow(2, cA.length-i-1);
    }
    return result;
}