Build a process pipeline using processbuilder in Java 7

I've been trying to figure out how to manage some processes in Java using the new process builder I can't find a suitable example of what I want to do. When I try to do the process myself, the process will hang up I will be very grateful for some running equivalent to cat test Txt | is a simple example of the code WC, but not through the shell

–Update–

OK, just to clarify I know there are some ways to simulate pipes by reading and writing streams I wonder if it can be done in some automatic way through the redirectinput and redirectoutput methods introduced in Java 7

Solution

In this case, you do not need a pipe

"grep bla test.txt"

But suppose you need a pipe, you need to use a shell like bash

"/bin/bash","-c","grep foo text.txt | grep bar"