Java 9 Regular Expressions

The Matcher class

An instance of the Matcher class performs various match operations on a character sequence by interpreting a compiled regular expression represented by an instance of Pattern. This is how we use this class to match a regex:

• We create a matcher instance from a pattern by invoking the pattern's matcher method that requires the input sequence as argument
• The instance of matcher is used to perform three types of match operations using these three methods, each returning a Boolean value (true indicates success):
  • matches
  • find
  • lookingAt

These methods perform the matching in the following manner:

• The matches method attempts to match the complete input sequence using the matcher's pattern
• The find method searches the input ...