Get an OutputStream into a String

What's the best way to pipe the output from an java.io.OutputStream to a String in Java?

bash: redirect and append both stdout and stderr

To redirect stdout in bash, overwriting file

cmd > file.txt

To redirect stdout in bash, appending to file

Best way to copy between two Stream instances - C#

What is the best way to copy the contents of one stream to another? Is there a standard utility method for this?

In Java, how do I read/convert an InputStream to a String?

If you have java.io.InputStream object, how should you process that object and produce a String ?

Android Reading from an Input stream efficiently

I am making an HTTP get request to a website for an android application I am making.

Can I demultiplex streams?

I want to join stderr ( getErrorStream ) and stdout ( getInputStream ) of a Process into a single Stream to be consumed elsewhere. Is there anything in Java's library that will do that for me?