Java TCP How do you read a sent stream size (header) and keep reading based upon that size

Question

Given the following pseudo code. how would I do read in the given data

Answer 1

You can try JBBP

@Bin class Struct { byte [] payload; }
@Bin class ParsedStream { Struct [] structs; }
ParsedStream parsed = JBBPParser.prepare("structs[_] { ushort size; byte [size] payload; }").parse(theInStream).mapTo(ParsedStream.class);