1. Overview
This lab is intended to get you familiarized with Java socket programming under a Linux environment. The goal is to complete and run a simple server program with Java sockets*.
*Make sure you understand LAB-320's machines Linux environment.
2. Statement of Work
Complete ~css434/lab1a/EchoServer.java that receives an ASCII message from a telnet client and simply echos it back to the client.
EchoServer.java: opens a ServerSocket at a given port and goes into the
following loop: (1) wait for a new client connection, (2) read a byte message, (3) simply echo it back, and (4) close this client connection.
If you cannot find the EchoServer.java in the folder stated above, get it from here /CSSDIV
/classes/434/lab1a
i.e.,
cp /CSSDIV/classes/434/lab1a/EchoServer.java .
To compile your programs, type:
yourlogin@uw1-320-10:~/lab1a$ javac EchoServer.java
Run your server program first and then ssh
yourlogin@uw1-320-10:~/lab1a$ java EchoServer port yourlogin@uw1-320-11:~/lab1a$ telnet uw1-320-10 port
yourlogin@uw1-320-10:~/lab1a$ java EchoServer 12345
yourlogin@uw1-320-11:~/lab1a$ telnet uw1-320-10 12345
Connected to uw1-320-10.
Escape character is '^]'.
Hi!
Hi!
Connection closed by foreign host.
yourlogin@uw1-320-11:~/lab1a$
Take a snapshot of the program’s execution.
Related Materials
To understand Java sockets, see slides: p5 - 7 of IPC slides
