Elegant Objects (EO) is an object-oriented programming paradigm that renounces traditional techniques like null, getters-and-setters, code in constructors, mutable objects, static methods, annotations, type casting, implementation inheritance, data objects, etc.

Books:

• Object Thinking
• Elegant Objects (vol.1 and vol.2)

Online: Telegram chat.

Twitter: #elegantobjects.

Videos:

• OOP is Dead! Long Live OODD! by David West
• Java vs OOP by @yegor256

Blog posts:

• ORM Is an Offensive Anti-Pattern by @yegor256
• Seven Virtues of a Good Object by @yegor256
• Dolls and Maquettes by @amihaiemil
• Test Driven Rest by @amihaiemil

Languages: EO (experimental).

Principles:

• No null (why?)
• No code in constructors (why?)
• No getters and setters (why?)
• No mutable objects (why?)
• No static methods, not even private ones (why?)
• No instanceof, type casting, or reflection (why?)
• No public methods without contract (interface) (why?)
• No statements in test methods except assertThat (why?)
• No implementation inheritance (why? and why?)

Frameworks/libraries:

• Takes by @yegor256 (Java)
• Cactoos by @yegor256(Java)
• Atoms by @icarus-consulting (C# port of Cactoos)
• Kactoos by @neonailol (Kotlin port of Cactoos)
• OO-Atom by @pragmatic-objects (Java)
• OO-Tests by @pragmatic-objects (Java)
• excel-io by @Vatavuk (Java)
• cactoos-crypto by @g4s8 (Java)
• cactoos-matchers by @llorllale (Java)
• cactoos-math by @VsSekorin (Java)
• cactoos-http by @yegor256 (Java)
• cactoos-jdbc by @fabriciofx (Java)
• cactoos-json by @VsSekorin (Java)
• eo-yaml by @amihaiemil (Java)
• docker-java-api by @amihaiemil (Java)
• sql-boot by @mgramin (Java)
• 2out by @DronMDF (C++)
• eo-envelopes by @victornoel (Java)
• matchers-json (OO unit testing for JSON) by @g4s8 (Java)

Products: jare.io, wring.io, jpeek.org, charles-rest, Puzzler bot.

If your project is maintained well and designed with the EO spirit in mind, please submit it to the annual quality award and win up to $4,096.

Contributors:

• @yegor256: blog, books, videos.
• @skapral: blog

Fans (in alphabetical order): @aistomin, @alex-semenyuk, @alhadhrami @aliceice @amihaiemil, @biboran, @dmydlarz, @driver733, @DronMDF, @eduardsi, @fabriciofx, @filfreire, @g4s8, @koeeenig, @kogoia, @maratori, @meerownymous, @mgramin, @nicholasruunu, @paulodamaso, @proshin-roman, @RRochegude, @SilasReinagel, @sivaa, @skapral, @smallcreep, @tomasz_bawor, @t-izbassar, @vatavuk, @vssekorin.

Badges for your GitHub repo:

If you want to join our core team, text @yegor256 in Telegram. He will add you to our private group and you will know what to do.

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