March 2005
Beginner to intermediate
1254 pages
104h 21m
English
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Name
ProcessBuilder
Synopsis
This class launches operating system
processes, producing Process objects. Specify the
operating system command when you invoke the ProcessBuilder(
) constructor or with the command(
)
method. Commands are specified
with one or more strings, typically the filename of the executable to
run followed by the command-line arguments for the executable.
Specify these strings in a List, a
String[ ], or, most conveniently, using a
variable-length argument list of strings.
Before launching the command you have specified, you can configure
the ProcessBuilder. Query the current working
directory with the no-argument version of directory(
)
and set it with the
one-argument version of the method. Query the mapping of environment
variables to values with the environment(
)
method. You can alter the
mappings in the returned Map to specify the
environment you want the child process to run in. Pass
true to redirectErrorStream(
)
if you would like both the
standard output and the standard error stream of the child process to
be merged into a single stream that you can obtain with
Process.getInputStream( ). If you do so, you do
not have to arrange to read two separate input streams to get the
output of the process.
Once you have specified a command and configured your
ProcessBuilder as desired, call the
start( )
method
to launch the process. You then use methods of the returned
Process to provide input to the process, read output from the process, or wait for the process ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.