communciate with c server

[lolita ling]

Hi!everyone!
I have a java program work as a socket client to communciate with the c server.
the java client send a String to the c side server,receive the reply.but the reply String's length is unknow.
I use OutputStream.write(byte[]) to send String to c server.I worked fine.

my question is how should I receive the String from c side?the c return a string ends with '\0', how can I trim it. Can somebody show me the working code.

thanks in advance!