Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang. The code is tested using the latest revision of the JDK for supported LTS releases: 8, 11, 17, 21 and 25 currently.

Implementation for Apache Log4J, a highly configurable logging tool that focuses on performance and low garbage generation. It has a plugin architecture that makes it extensible and supports asynchronous logging based on LMAX Disruptor.

API for Apache Log4J, a highly configurable logging tool that focuses on performance and low garbage generation. It has a plugin architecture that makes it extensible and supports asynchronous logging based on LMAX Disruptor.

The Apache Log4j SLF4J API binding to Log4j 2 Core

Caffeine is a high performance, near optimal caching library. It provides an in-memory cache using a Google Guava inspired API.

Apache Hadoop Common

The Flexible API mocking tool

The Apache Commons CSV library provides a simple interface for reading and writing CSV files of various types.

The Commons Configuration software library provides a generic configuration interface that enables an application to read configuration data from various sources and requires Java 8.

EqualsVerifier can be used in JUnit unit tests to verify whether the contract for the equals and hashCode methods is met.

Play