How do you match multiple Regex patterns for a single line of text in Java?

Question

Lets say I have multiple patterns P1, P2, P3,, and so on. These patterns are different Regex patterns to match different variations of DATE.

How do I match these for

Answer 1

I would not use Patterns to match dates.

You have DateFormat and SimpleDateFormat classes to do so.

This said, combining Patterns can be done with the alternation (|) operator on the String representation of the Pattern.