Waiting for end after calling BAT file

[Alessandro]

Is it possible to call a BAT file and make java code wait for script
execution end ??

Of course there could be many workaround like make bat script write a
particular file and java code makes polling or make java code wait for
a certain time, anyway I'd like to know if there is a direct way.

This is the bat file call:

//
Runtime runtime = Runtime.getRuntime();
runtime.exec("cmd /c start " + path + fileName);
//

Thanks and best rgds,
Alex

 

[Thomas Kellerer]

Alessandro, 03.03.2009 11:37:

Is it possible to call a BAT file and make java code wait for script
execution end ??

This is the bat file call:

//
Runtime runtime = Runtime.getRuntime();
runtime.exec("cmd /c start " + path + fileName);
//

Process p = runtime.exec("...");
p.waitFor();

http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Process.html

 

[Lew]

Alessandro multiposted:
Please do not multi-post. Cross-posted to bring replies together; f/u set to
comp.lang.java.help.

 

[Thomas Kellerer]

Steve W. Jackson, 03.03.2009 15:13:

That was my thought too, but a caveat might be in order...depending on
how faulty my memory is. I *think* I remember that the "start" command
will cause whatever is being launched to run separately. If so, then
the waitFor will return after the execution of the batch file without
waiting for whatever it launched.

If the OP wants to wait for the .bat execution he shouldn't use start


runtime.exec("cmd /c " + path + fileName);

should work just fine (not tested)

Thomas

 

[RedGrittyBrick]

Is it possible to call a BAT file and make java code wait for script
execution end ??

Of course there could be many workaround like make bat script write a
particular file and java code makes polling or make java code wait for
a certain time, anyway I'd like to know if there is a direct way.

This is the bat file call:

//
Runtime runtime = Runtime.getRuntime();
runtime.exec("cmd /c start " + path + fileName);
//

Thanks and best rgds,
Alex

You multiposted - thanks for wasting my time!

Read this to find out what multiposting means
http://www.cs.tut.fi/~jkorpela/usenet/xpost.html

 

[Arne Vajhøj]

That was my thought too, but a caveat might be in order...depending on
how faulty my memory is. I *think* I remember that the "start" command
will cause whatever is being launched to run separately.

Me too.

Arne

 

[Arne Vajhøj]

Steve W. Jackson, 03.03.2009 15:13:

If the OP wants to wait for the .bat execution he shouldn't use start

runtime.exec("cmd /c " + path + fileName);

should work just fine (not tested)

Another potential issue is that if the command produces
lots of output, then iy may be necesarry to actually read
that.

Arne