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how to get processid in java.

3 replies on 1 page. Most recent reply: Oct 3, 2002 7:24 AM by Enric Jaen

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Trilok

Posts: 2
Nickname: thril
Registered: Jul, 2002

how to get processid in java.

Posted: Jul 16, 2002 6:25 AM

i need to interact with the shell in the java program. and i need to get the processid of that process.
in c, we can get it using the system call getpid().
but how to get it in java. even by instantiating the java.lang.runtime and using the exec()method, i couldn't get the process id.
pls help me.

Chet Underwood, Esq.

Posts: 14
Nickname: chet
Registered: Mar, 2002

Re: how to get processid in java.

Posted: Jul 16, 2002 11:32 AM

Just call java.lang.platform-specific.getProcessId(). It returns a variant, of course.

Trilok

Posts: 2
Nickname: thril
Registered: Jul, 2002

Re: how to get processid in java.

Posted: Jul 17, 2002 4:06 AM

Thanks for the reply, but i couldn't find that java.lang.platform-specific.getProcessId()method in the API.and am using jdk1.3.1. do i need to use any latest version? pls. clarify.
Any way, i got someother option. i could find one package using which we can get the process id .the link is http://www.amug.org/~glguerin/index.html .

Enric Jaen

Posts: 1
Nickname: ejaen
Registered: Oct, 2002

Re: how to get processid in java.

Posted: Oct 3, 2002 7:24 AM

Another way to get the processId is using a simple script containing:

#!/bin/bash
java your-classs &
echo $! > pidfile

and then you can read the pidfile from your java program:

BufferedReader pid =new BufferedReader(new FileReader("pidfile"));
System.out.println(pid.readLine());

Hope it helps,
-Enric

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