how to get result from java when java thread is running in background

[rama ilango]

I will call java program by shell script.
This java start the thread and return the result to the shell script.
My problem is shell script is waiting upto stop the thread.
I want the result when thread is running in background.
please reply.

[Tim Holloway]

"result" and "running" are two mutually exclusive terms. The whole definition of "result" is what you get after it finishes running.

If you're actually looking for the success/failure of the attempt to launch a thread, that's different. However a Java thread runs in a JVM, and the JVM process itself doesn't complete until all of its internal threads (which may not correspond to OS threads) have terminated.

Which is all I can say without knowing more.

[rama ilango]

for example
this is my script file as shelltest.sh

output=`java test`
echo "$output";
echo "success";

when run this script, it run the test.java.
this java file call the thread.
So this script is completed, after stop the thread only.
But i want : when thread is running in background, the script file should print the success(It is in echo) and come out from sh.
reply me

[Raf Szczypiorski]

If I understand correctly, you want to start a java process and return. If that's what you want:

java test &
echo Success

and that's it. & is a special bash character that tells it to invoke the command in a background process.