5.9.8 Binary Translator

public String binaryToText(String binary)
{
    String ret = "";
    // Write your code here!
    for( int i=0; i<binary.length(); i+=8)
    {
        String s = binary.substring(i, i+8);
        int dec = binaryToDecimal(s);
        char c = (char)dec;
        ret += String.valueOf(c);
    }
    return ret;
}


public int binaryToDecimal(String binaryString)
{
    String[] digits = binaryString.split("");
    int res=0;
    int exp=digits.length-1;
    for(int i=0; i<digits.length; i++)
    {
        int curDigit = Integer.valueOf(digits[i]).intValue();
        res += curDigit * Math.pow(2, exp);
        exp --;
    }
    return res;
}