Question

I have 4 strings:

 str1 = 10110011;(length of all string is:32)
 str2 = 00110000;
 str3 = 01011000;
 str4 = 11110000;

In my project I have to add these string and the result should be:

result[1] = str1[1]+str2[1]+str3[1]+str4[1];

result should be obtained as addition of integer numbers.

For the example above, result = 22341011

I know integer to string conversion in Java is very easy but I found string to integer conversion a little harder.

Answer 1

To parse Integers -2^31 < n < 2^31-1 use:

Integer value = Integer.valueOf("10110011");

For numbers that are larger, use the BigInteger class:

BigInteger value1 = new BigInteger("101100111011001110110011101100111011001110110011");
BigInteger value2 = // etc
BigInteger result = value1.add(value2).add(value3); //etc.