regex - What is the proper way of inserting a pipe into a Java Pattern expression?

Question

What is the proper way of inserting a pipe into a Java Pattern expression?

I actually want to use a pipe as a delimiter and not the or operator.

I.E:

"hello|world".split("|"); --> {"hello", "world"}

Answer 1

in Java 1.5+:

"hello|world".split(Pattern.quote("|"));