Calling a another program from Java

[Silveira Neto]

Hi guys,
I'm trying to call a program by an Java programming. Like a terminal
command like "rm -rf thing" or "ls" or "firefox", and get its output.
Just that.
In C I do that with system("ls -la|grep something > somefile.txt"). I
know that I'll lose some portability if I use pipes, but I need them.

 

[Silveira Neto]

Oh sorry, finally I found (in the message before mine). The
Runtime.getRuntime.exec("ls -la").
If someone wants, is there:
http://www.rgagnon.com/javadetails/java-0014.html

And I guess using streams its possible to make it still portable and
not use pipes.

Thanks.

 

[Roedy Green]

I'm trying to call a program by an Java programming. Like a terminal
command like "rm -rf thing" or "ls" or "firefox", and get its output.
Just that.
In C I do that with system("ls -la|grep something > somefile.txt"). I
know that I'll lose some portability if I use pipes, but I need them.

see http://mindprod.com/jgloss/exec.html

 

[Joshua Cranmer]

Hi guys,
I'm trying to call a program by an Java programming. Like a terminal
command like "rm -rf thing" or "ls" or "firefox", and get its output.
Just that.
In C I do that with system("ls -la|grep something > somefile.txt"). I
know that I'll lose some portability if I use pipes, but I need them.

You'll also lose portability by using "ls" : Windows does not support
the ls command.

If you want to manipulate file hierarchies, java.io.File can help you
with that in a truly cross-platform manner.