String to Binary to Integer

[Brendan Crisler]

This may sound stupid, but I am needing help parsing out a 168-bit "binary" stirng (it's a string, but it's just 0s and 1s).

What I need to do is parse out certain portions of the string (using substring), and from those substrings, get an integer equivalent.

Example:

/*****
String a = testData.substring(8, 38);
// a = 001110101011000011010111011000
*****/

I want to convert 'a' to integer.

Any help is appreciated.

Thanks,
B

[Bennett Rainville]

I don't know of anything in the java library that will do this for you, but if you'd like to try an implement a solution yourself this would be a good place to start.

[Garrett Rowe]

Integer.parseInt(String ,int) does just what you want:

public class ParseBinary
{
   public static void main(String[] args)
   {
      String binString = "001110101011000011010111011000";
      
      final int BINARY_RADIX = 2;
      
      int asNumber = Integer.parseInt(binString, BINARY_RADIX);
      System.out.println(asNumber);
    }
 }

[Brendan Crisler]

Thanks. That's what I had done. Took me a while to realize it, and as soon as I did, I came here and saw the same things I had just done.

Thanks again.

[Oliver Kamps]

Hi,

since you have to handle 168 bits try java.math.BigInteger.BigInteger(String, int).

Cheers,
Oliver