Java and c struct

Question

Dear All;
i wrote a socket client program with java to communicate
with the server program which was writen by c language;
i got a byte stream from the socket,how can i parse a c struct
into java object?
the c struct received from the server side like this:
struct c_struct
int i[3];
char c[30];
i read it like this:
DataInputStream dis=new DataInputStream(new InputStream(socket.getInputStream()));
byte b[]=new byte[42];
dis.read(b);
so, how can i parse the byte[] into java object?
if not, how can i do?

Answer 1

Well, it looks like you're getting three 4 byte ints and thirty 1 byte chars. Decoding the chars is easy but doing the ints will take a little work. It's probably something like
int i = b[0] + b[1]*256 + b[2]*256*256 + b[3]*256*256*256;or it's the other way around (switch the order of the bytes).
As for how to get it into a Java object, first you need to make an object that holds 30 bytes and 4 ints and takes them in the constructor (hint: use arrays). Voila!