🚀 go-pugleaf

Here's a static method that we use:

 public static int ByteArrToInt(byte[] bA)
   throws ArrayIndexOutOfBoundsException
 {
  if (bA.length != 4)
   throw new ArrayIndexOutOfBoundsException("Array must be 4 bytes");

  int result = ((int)bA[0] << 24) & 0xff000000;
  result |= ((int)bA[1] << 16) & 0x00ff0000;
  result |= ((int)bA[2] << 8) & 0x0000ff00;
  result |= ((int)bA[3]) & 0x000000ff;

  return result;
 }

You may need to adjust this depending upon the endian-ness of your system.


Tim

"Tom Heagy" <tom.heagy@sciatl.com> wrote in message
news:3af6e910$1_2@dnews...
> Question:  How do I convert a byte array to an int or Integer?
>
> Problem:  I'm receiving a TCP InputStream from a C application.  The
stream
> consists of a byte array that was built by the C application.  Part of the
> byte array contains a number (converted to it's 4 byte format).  How do I
> take these 4 bytes and convert them into a number I can use in my Java
> application?  The String class provides a conversion constructor method
for
> use with byte arrays but I can't find anything similar for numbers.
>
> Any suggestions would be greatly appreciated.
>
> -Tom
>
>