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 ### Relevant Articles:
 - [Introduction to Java Logging](http://www.baeldung.com/java-logging-intro)
+- [Introduction to SLF4J](http://www.baeldung.com/slf4j-with-log4j2-logback)
+- [Generate equals() and hashCode() with Eclipse](http://www.baeldung.com/java-eclipse-equals-and-hashcode)
+- [A Guide To Java Regular Expressions API](http://www.baeldung.com/regular-expressions-java)