In your example, you have: if (new BigInteger(“1111000011110001”, 2).toByteArray() == array) When dealing with objects, == in java compares reference values. You’re checking to see if the reference to the array returned by toByteArray() is the same as the reference held in array, which of course can never be true. In addition, array classes don’t … Read more
To get the first 10 bytes, as noted already: head -c 10 To get all but the first 10 bytes (at least with GNU tail): tail -c+11
Bitwise operators are operators that work on multi-bit values, but conceptually one bit at a time. AND is 1 only if both of its inputs are 1, otherwise it’s 0. OR is 1 if one or both of its inputs are 1, otherwise it’s 0. XOR is 1 only if exactly one of its inputs … Read more
You can convert between a string representation of the binary using bin() and int() >>> bin(88) ‘0b1011000’ >>> int(‘0b1011000’, 2) 88 >>> >>> a=int(‘01100000’, 2) >>> b=int(‘00100110’, 2) >>> bin(a & b) ‘0b100000’ >>> bin(a | b) ‘0b1100110’ >>> bin(a ^ b) ‘0b1000110’
You could encode the binary data using base64 and put it into a Base64 element; the below article is a pretty good one on the subject. Handling Binary Data in XML Documents
Use Integer#toBinaryString(): byte b1 = (byte) 129; String s1 = String.format(“%8s”, Integer.toBinaryString(b1 & 0xFF)).replace(‘ ‘, ‘0’); System.out.println(s1); // 10000001 byte b2 = (byte) 2; String s2 = String.format(“%8s”, Integer.toBinaryString(b2 & 0xFF)).replace(‘ ‘, ‘0’); System.out.println(s2); // 00000010 DEMO.
This should do the trick: pw_bytes.decode(“utf-8”)
Binary protocol versus text protocol isn’t really about how binary blobs are encoded. The difference is really whether the protocol is oriented around data structures or around text strings. Let me give an example: HTTP. HTTP is a text protocol, even though when it sends a jpeg image, it just sends the raw bytes, not … Read more
Yet another method based on file(1) behavior: >>> textchars = bytearray({7,8,9,10,12,13,27} | set(range(0x20, 0x100)) – {0x7f}) >>> is_binary_string = lambda bytes: bool(bytes.translate(None, textchars)) Example: >>> is_binary_string(open(‘/usr/bin/python’, ‘rb’).read(1024)) True >>> is_binary_string(open(‘/usr/bin/dh_python3’, ‘rb’).read(1024)) False
If you want to do this the C++ way, do it like this: #include <fstream> #include <iterator> #include <algorithm> int main() { std::ifstream input( “C:\\Final.gif”, std::ios::binary ); std::ofstream output( “C:\\myfile.gif”, std::ios::binary ); std::copy( std::istreambuf_iterator<char>(input), std::istreambuf_iterator<char>( ), std::ostreambuf_iterator<char>(output)); } If you need that data in a buffer to modify it or something, do this: #include <fstream> … Read more