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## Core Java 8 Cookbooks and Examples

### Relevant Articles: 

- [An Overview of Regular Expressions Performance in Java](https://www.baeldung.com/java-regex-performance)
- [A Guide To Java Regular Expressions API](http://www.baeldung.com/regular-expressions-java)
- [Guide to Escaping Characters in Java RegExps](http://www.baeldung.com/java-regexp-escape-char)
- [Pre-compile Regex Patterns Into Pattern Objects](https://www.baeldung.com/java-regex-pre-compile)
- [Difference Between Java Matcher find() and matches()](https://www.baeldung.com/java-matcher-find-vs-matches)
- [How to Use Regular Expressions to Replace Tokens in Strings in Java](https://www.baeldung.com/java-regex-token-replacement)
- [Regular Expressions \s and \s+ in Java](https://www.baeldung.com/java-regex-s-splus)
- [Validate Phone Numbers With Java Regex](https://www.baeldung.com/java-regex-validate-phone-numbers)
- [How to Count the Number of Matches for a Regex?](https://www.baeldung.com/java-count-regex-matches)