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Apache commons


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Apache Commons is an Apache project focused on all aspects of reusable Java components.
It is divided into three components: Commons Proper, Commons Sandbox, Commons Dormant.

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Apache commons

  1. 1. Apache Commons Anubhav Goyal
  2. 2. Introduction About Commons Proper About Commons Sandbox About Commons Dormant References Content
  3. 3. Introduction Apache Commons is an Apache project focused on all aspects of reusable Java components. It is divided into three components: ● The Commons Proper. ● The Commons Sandbox. ● The Commons Dormant.
  4. 4. Commons Proper Commons Proper is dedicated to one principal goal: creating and maintaining reusable Java components. The Commons Proper is a place for collaboration and sharing, where developers from throughout the Apache community can work together on projects to be shared by the Apache projects and Apache users
  5. 5. There are many libraries, which are released and being used as reusable component. Few of them are following: ● BeanUtils ● Collections ● Codec ● Lang ● Functor ● Number ● Email ● Imaging, etc.
  6. 6. BeanUtils: Apache Commons BeansUtils contains all tools necessary for working with Java beans. Simply put, a bean is a simple Java classes containing fields, getters/setters, and a no-argument constructor. Java provides reflection and introspection capabilities to identify getter-setter methods and call them dynamically. Dependency: compile group: 'commons-beanutils', name: 'commons-beanutils', version: '1.9.2'
  7. 7. Collections: Commons-Collections seek to build upon the JDK classes by providing new interfaces, implementations and utilities. There are many features, including: ● Bag interface ● BidiMap interface ● MapIterator Dependency: compile group: 'org.apache.commons', name: 'commons-collections4', version: '4.2'
  8. 8. Codec: Apache Commons Codec (TM) software provides implementations of common encoders and decoders such as Base64, Hex, Phonetic and URLs. Dependency: compile group: 'org.apache.commons', name: 'commons-collections4', version: '4.2'
  9. 9. Lang: The standard Java libraries fail to provide enough methods for manipulation of its core classes. Apache Commons Lang provides these extra methods. Lang provides a host of helper utilities for the java.lang API, notably String manipulation methods, basic numerical methods, object reflection, concurrency, creation and serialization and System properties. Dependency: compile group: 'org.apache.commons', name: 'commons-lang3', version: '3.8.1'
  10. 10. Functor: A functor is a function that can be manipulated as an object, or an object representing a single, generic function. Commons Functor defines three general types of functors: 1. Predicates 2. Functions 3. Procedures
  11. 11. The Commons project also contains a workspace that is open to all Apache committers. It's a place to try out new ideas and prepare for inclusion into the Commons portion of the project or into another Apache project. SandBox
  12. 12. We can not use any library which lies in sandbox, yet there are documentation available.
  13. 13. These are Commons components that have been deemed inactive since they have seen little recent development activity. If you wish to use any of these components, you must build them yourselves. Dormant
  14. 14. Reference: ● ● les/?api=org.apache.commons.mail.Email ● eanutils ● ● Demo Link: git