Question

I have many hexcodes here and I want to get them into Java without appending 0x to every entity. Like:

0102FFAB and I have to do the following:

byte[] test = {0x01, 0x02, 0xFF, 0xAB};

And I have many hexcodes which are pretty long. Is there any way to make this automatically?

Answer 1

You could try and put the hex codes into a string and then iterate over the string, similar to this:

String input = "0102FFAB";
byte[] bytes = new byte[input.length() / 2];

for( int i = 0; i < input.length(); i+=2)
{
  bytes[i/2] = Integer.decode( "0x" + input.substring( i, i + 2 )  ).byteValue();
}

Note that this requires even length strings and it is quite a quick and dirty solution. However, it should still get you started.