Telnet using Java

[Arpit]

Hi!

Can someone tell me how to do telnet in java. I want to execute one command on my unix box using telnet. I have Machine name and userid/pwd with me.
I believe there is not any java API available till yet.

Please help me asap as my deadline is very near.
If any API is available ( open source ) , please let me know.

thanks and regards,
Arpit Jain
SCJP

[Joe Ess]

Arpit, please change your displayed name to conform to our
naming policy. In short, your name must be a first name and last name, separated by a space and not obviously fake.
I am going to move this post to the Sockets and Internet Protocols forum, which is more appropriate for telnet discussion.

[Nik lammar]

Look at my article...
This is a simple telnet server...
web page

[Ko Ko Naing]

Originally posted by Arpit:
Can someone tell me how to do telnet in java.....
.....
Please help me asap as my deadline is very near.

It might not be a big deal for an experienced developer to help you coding this kind of simple application. But it won't increase your programming skill, which is one of the reasons that you are on this kind of project.

But I can give you some hints to help you. Just a sketch to see the idea.
-Create Socket to the telnet server that you are connecting to.
-Using OutputStream and InputStream associated with that Socket to communicate with the telnet server. (This might be a handy job.)
-Put your code inside while(true) loop and put a terminating criterion inside that loop also so that your loop won't run forever.

That's it! I hope you get some ideas...

Try to code sthing and ask questions here... It's a good way to learn things...

[somkiat puisungnoen]

http://www.jscape.com/inetfactory/index.html

[Mike Finn]

http://jakarta.apache.org/commons/net/

[Ko Ko Naing]

Originally posted by somkiat puisungnoen:
http://www.jscape.com/inetfactory/index.html

Well, the above package is not free and we need to buy the full version, if we want to use it... And it won't be that useful for studying how they work...

But the Jakarta's Commons Net, that Mike said, would be good for studying how those protocols work and using Java to implement them...

Reading the corresponding RFCs and implementing them by ourselves would be a better approach to learn in details of how they work...

[Van Glass]

The relevant RFC's that you will want to read are RFC 854 and RFC 855. Hope that helps.

[Bart van Kuik]

Instead of coding the whole thing, just run an Ant task. See the next example, in which a download from a source repository is done on a Windows box.

  <target name="telnet">
    <telnet userid="${remote_userid}" password="${remote_password}" server="${remote_server}">
       <read>Server</read>
       <write>d:</write>
       <read>D:</read>
       <write>cd \Inetpub\ftproot\eew_abs\build_scripts\bin</write>
       <read>bin</read>
       <write>cd d:\Inetpub\ftproot\eew_abs\build_scripts\bin</write>
       <read>bin</read>
       <write>download_designer.cmd ${designer_user} ${designer_pass} ${designer_wa}</write>
       <read>Download from repository: FINISHED</read>
    </telnet>
  </target>
 

[Bart van Kuik]

Forgot to mention: if you want to code it your, check out the Apache Commons/Net library. I've used the FTP part and it's excellent.