Design patterns implemented in Java

Overview

Design patterns implemented in Java

Java CI License MIT Lines of Code Coverage Join the chat at https://gitter.im/iluwatar/java-design-patterns

All Contributors


Read in different language : CNCN, KRKR, FRFR, TRTR, ARAR


Introduction

Design patterns are the best formalized practices a programmer can use to solve common problems when designing an application or system.

Design patterns can speed up the development process by providing tested, proven development paradigms.

Reusing design patterns help prevent subtle issues that cause major problems, and it also improves code readability for coders and architects who are familiar with the patterns.

Getting started

This site showcases Java Design Patterns. The solutions have been developed by experienced programmers and architects from the open source community. The patterns can be browsed by their high level descriptions or by looking at their source code. The source code examples are well commented and can be thought as programming tutorials on how to implement a specific pattern. We use the most popular battle-proven open source Java technologies.

Before you dive into the material, you should be familiar with various Software Design Principles.

All designs should be as simple as possible. You should start with KISS, YAGNI, and Do The Simplest Thing That Could Possibly Work principles. Complexity and patterns should only be introduced when they are needed for practical extensibility.

Once you are familiar with these concepts you can start drilling down into the available design patterns by any of the following approaches

  • Search for a specific pattern by name. Can't find one? Please report a new pattern here.
  • Using tags such as Performance, Gang of Four or Data access.
  • Using pattern categories, Creational, Behavioral, and others.

Hopefully you find the object oriented solutions presented on this site useful in your architectures and have as much fun learning them as we had developing them.

How to contribute

If you are willing to contribute to the project you will find the relevant information in our developer wiki. We will help you and answer your questions in the Gitter chatroom.

License

This project is licensed under the terms of the MIT license.

Contributors


Ilkka Seppälä

📆 🚧 🖋

amit1307

💻

Narendra Pathai

💻 🤔 👀

Jeroen Meulemeester

💻

Joseph McCarthy

💻

Thomas

💻

Anurag Agarwal

💻

Markus Moser

🎨 💻 🤔

Sabiq Ihab

💻

Amit Dixit

💻

Piyush Kailash Chaudhari

💻

joshzambales

💻

Kamil Pietruszka

💻

Zafar Khaydarov

💻 📖

Paul Campbell

💻

Argyro Sioziou

💻

TylerMcConville

💻

saksham93

💻

nikhilbarar

💻

Colin But

💻

Ruslan

💻

Juho Kang

💻

Dheeraj Mummareddy

💻

Bernardo Sulzbach

💻

Aleksandar Dudukovic

💻

Yusuf Aytaş

💻

Mihály Kuprivecz

💻

Stanislav Kapinus

💻

GVSharma

💻

Srđan Paunović

💻

Petros G. Sideris

💻

Pramod Gupta

👀

Amarnath Chandana

💻

Anurag870

💻 📖

Wes Gilleland

💻

Harshraj Thakor

💻

Martin Vandenbussche

💻

Alexandru Somai

💻

Artur Mogozov

💻

anthony

💻

Christian Cygnus

💻

Dima Gubin

💻

Joshua Jimenez

💻

Kai Winter

💻

lbroman

💻

Przemek

💻

Prafful Agarwal

🖋

Sanket Panhale

🖋

staillebois

💻

Krisztián Nagy

💻

Alexander Ivanov

💻

Yosfik Alqadri

💻

Agustí Becerra Milà

💻

Juan Manuel Suárez

💻

Luigi Cortese

💻

Katarzyna Rzepecka

💻

adamski.pro

💻

Shengli Bai

💻

Boris

💻

Dmitry Avershin

💻

靳阳

💻

hoangnam2261

💻

Arpit Jain

💻

Jón Ingi Sveinbjörnsson

💻

Kirill Vlasov

💻

Mitchell Irvin

💻

Ranjeet

💻

PhoenixYip

💻

M Saif Asif

💻

kanwarpreet25

💻

Leon Mak

💻

Per Wramdemark

💻

Evan Sia Wai Suan

💻

AnaghaSasikumar

💻

Christoffer Hamberg

💻

Dominik Gruntz

💻

Hannes

💻

Leo Gutiérrez Ramírez

💻

Zhang WH

💻

Christopher O'Connell

💻

George Mavroeidis

💻

Hemant Bothra

💻 🎨

Kevin Peters

💻

George Aristy

💻

Mahendran Mookkiah

💻

Azureyjt

💻

gans

💻

Matt

🖋

Gopinath Langote

💻

Hoswey

💻

Amit Pandey

💻

gwildor28

🖋

田浩

🖋

Stamatis Pitsios

💻

qza

💻

Rodolfo Forte

🖋

Ankur Kaushal

💻

Ovidijus Okinskas

💻

Robert Kasperczyk

💻

Tapio Rautonen

💻

Yuri Orlov

💻

Varun Upadhyay

💻

Aditya Pal

💻

grzesiekkedzior

💻 👀

Sivasubramani M

💻

Sami Airaksinen

💻

Janne Sinivirta

💻

Boris-Chengbiao Zhou

🖋

Jacob Hein

🖋

Richard Jones

🖋

Rachel M. Carmena

🖋

Zaerald Denze Lungos

🖋

Lars Kappert

🖋

Mike Liu

🌍

Matt Dolan

💻 👀

Manan

👀

Nishant Arora

💻

Peeyush

💻

Rakesh

💻 👀

Wei Seng

💻

Ashish Trivedi

💻

洪月阳

💻

xdvrx1

👀 🤔

Subhrodip Mohanta

💻 👀

Bethan Palmer

💻

Toxic Dreamz

💻

Edy Cu Tjong

📖

Michał Krzywański

💻

Stefan Birkner

💻

Fedor Skvorcov

💻

samilAyoub

💻

Vladislav Golubinov

💻

Swaraj

💻

Christoph Flick

📖

Ascênio

👀

Domenico Sibilio

📖

Akash Chandwani

👀

Pavlo Manannikov

💻

Eiman

💻

Rocky

📖

Ibrahim ali abdelghany

👀

Girish Kulkarni

📖

Omar Karazoun

💻

Jeff Evans

💻

Vivek Singh

💻

siavash

💻

ruchpeanuts

📖

warp125

🌍

KHADIR Tayeb

🌍

ignite1771

💻

Halil Demir

🌍

Rohit Singh

💻

byoungju94

💻

Moustafa Farhat

🌍

Martel Richard

💻

va1m

💻

Noam Greenshtain

💻
Comments
  • Attach tutorial links to patterns

    Attach tutorial links to patterns

    In the pattern template there is section for Tutorials. Here we should list tutorials explaining the pattern. One example is here http://java-design-patterns.com/patterns/hexagonal/.

    status: under construction epic: pattern type: enhancement info: good first issue info: hacktoberfest resolution: fixed priority: normal 
    opened by iluwatar 29
  • Checkstyle reports warnings

    Checkstyle reports warnings

    In issue https://github.com/iluwatar/java-design-patterns/issues/1016 we switched using Checkstyle's builtin google_checks.xml. The new ruleset finds over 6k warnings. In this issue we try fix those gradually, one pattern at a time. If you want to help, please comment on the issue which patterns will you be working on. We will follow the progress using the following table.

    [x] abstract-document [x] abstract-factory [x] acyclic-visitor [x] adapter [x] aggregator-microservices [x] ambassador [x] api-gateway [x] async-method-invocation [x] balking [x] bridge [x] builder [x] business-delegate [x] bytecode [x] caching [x] callback [x] chain [x] circuit breaker [x] collection-pipeline [x] command [x] commander [x] composite [x] converter [x] cqrs [x] dao [x] data-bus [x] data-locality [x] data-mapper [x] data-transfer-object [x] decorator [x] delegation [x] dependency-injection [x] dirty-flag [x] double-checked-locking [x] double-dispatch [x] eip-aggregator [x] eip-message-channel [x] eip-publish-subscribe [x] eip-splitter [x] eip-wire-tap [x] event-aggregator [x] event-asynchronous [x] event-driven-architecture [x] event-queue [x] event-sourcing [x] execute-around [x] extension-objects [x] facade [x] factory-kit [x] factory-method [x] feature-toggle [x] fluentinterface [x] flux [x] flyweight [x] front-controller [x] guarded-suspension [x] half-sync-half-async [x] hexagonal [x] intercepting-filter [x] interpreter [x] iterator [x] layers [x] lazy-loading [x] leader-election [x] marker [x] master-worker-pattern [x] mediator [x] memento [x] model-view-controller [x] model-view-presenter [x] module [x] monad [x] monostate [x] multiton [x] mute-idiom [x] mutex [x] naked-objects [x] null-object [x] object-mother [x] object-pool [x] observer [x] page-object [x] partial-response [x] pipeline [x] poison-pill [x] priority-queue [x] private-class-data [x] producer-consumer [x] promise [x] property [x] prototype [x] proxy [x] queue-load-leveling [x] reactor [x] reader-writer-lock [x] repository [x] resource-acquisition-is-initialization [x] retry [x] semaphore [x] servant [x] serverless [x] service-layer [x] service-locator [x] singleton [x] spatial-partition [x] specification [x] state [x] step-builder [x] strategy [x] template-method [x] thread-pool [x] throttling [x] tls [x] tolerant-reader [x] trampoline [x] twin [x] typeobjectpattern [x] unit-of-work [x] value-object [x] visitor

    Links: https://github.com/checkstyle/checkstyle/blob/master/src/main/resources/google_checks.xml https://google.github.io/styleguide/javaguide.html

    info: help wanted status: under construction info: good first issue info: hacktoberfest type: refactoring resolution: fixed priority: low epic: code quality 
    opened by iluwatar 28
  • Accepting presentations for the design patterns

    Accepting presentations for the design patterns

    @iluwatar What do u think if we create presentations for these nice collections of design patterns. Either one for each for one for all. Something based on impress.js or similar would be great I think. Happy to contribute. Kiitos

    info: help wanted type: enhancement info: needs splitting resolution: won't fix 
    opened by zafarella 26
  • Java 11 support: Utilize new methods

    Java 11 support: Utilize new methods

    This task is part of the Java 11 transition plan https://github.com/iluwatar/java-design-patterns/wiki/16.-Java-11-Transition

    This is a refactoring ticket where we start to utilize new Java 11 functionality.

    1. Collecting to unmodifiable collections is possible using the new Collector for Streams operations to put the results into an immutable collection (see https://www.infoq.com/articles/upgrading-java-8-to-12/)

    2. Predicate::not provides an easy way to negate predicate lambdas or method references, again reducing the boilerplate in our code (see https://www.infoq.com/articles/upgrading-java-8-to-12/)

    3. New methods on Optional give even more options for coding in a functional style when using an Optional instead of having to use clumsy if statements (see https://winterbe.com/posts/2018/09/24/java-11-tutorial/)

    4. Streams have new methods ofNullable, dropWhile, takeWhile (see https://winterbe.com/posts/2018/09/24/java-11-tutorial/)

    5. String has new helper methods (see https://winterbe.com/posts/2018/09/24/java-11-tutorial/)

    6. InputStream finally gets a super useful method to transfer data to an OutputStream (see https://winterbe.com/posts/2018/09/24/java-11-tutorial/)

    7. Convenience Factory Methods for Collections make it significantly easier to create collections like lists, maps and sets (see https://winterbe.com/posts/2018/09/24/java-11-tutorial/)

    It's a huge task to do this for all the patterns at once so it is possible to create pull requests for individual patterns. This way we can complete the task gradually. The following checklist tracks which patterns have already been refactored.

    [x] abstract-document [x] abstract-factory [x] acyclic-visitor [x] adapter [x] aggregator-microservices [x] ambassador [x] api-gateway [x] async-method-invocation [x] balking [x] bridge [x] builder [x] business-delegate [x] bytecode [x] caching [x] callback [x] chain [x] circuit-breaker [x] collection-pipeline [x] command [x] commander [x] composite [x] converter [x] cqrs [x] dao [x] data-bus [x] data-locality [x] data-mapper [x] data-transfer-object [x] decorator [x] delegation [x] dependency-injection [x] dirty-flag [x] double-checked-locking [x] double-dispatch [x] eip-aggregator [x] eip-message-channel [x] eip-publish-subscribe [x] eip-splitter [x] eip-wire-tap [x] event-aggregator [x] event-asynchronous [x] event-driven-architecture [x] event-queue [x] event-sourcing [x] execute-around [x] extension-objects [x] facade [x] factory-kit [x] factory-method [x] faq.md [x] feature-toggle [x] fluentinterface [x] flux [x] flyweight [x] front-controller [x] guarded-suspension [x] half-sync-half-async [x] hexagonal [x] intercepting-filter [x] interpreter [x] iterator [x] layers [x] lazy-loading [x] leader-election [x] marker [x] master-worker-pattern [x] mediator [x] memento [x] model-view-controller [x] model-view-presenter [x] module [x] monad [x] monostate [x] multiton [x] mute-idiom [x] mutex [x] naked-objects [x] null-object [x] object-mother [x] object-pool [x] observer [x] page-object [x] partial-response [x] pipeline [x] poison-pill [x] priority-queue [x] private-class-data [x] producer-consumer [x] promise [x] property [x] prototype [x] proxy [x] queue-load-leveling [x] reactor [x] reader-writer-lock [x] repository [x] resource-acquisition-is-initialization [x] retry [x] semaphore [x] servant [x] serverless [x] service-layer [x] service-locator [x] singleton [x] spatial-partition [x] specification [x] state [x] step-builder [x] strategy [x] template-method [x] thread-pool [x] throttling [x] tls [x] tolerant-reader [x] trampoline [x] twin [x] typeobjectpattern [x] unit-of-work [x] value-object [x] visitor

    status: under construction type: enhancement info: good first issue info: hacktoberfest type: refactoring resolution: fixed 
    opened by iluwatar 25
  • Lock Pattern #71: Added mutex and semaphore modules to demonstrate locks

    Lock Pattern #71: Added mutex and semaphore modules to demonstrate locks

    Added two modules to demonstrate locks.

    Mutex demonstrates a simple mutual exclusion lock. This is a binary lock which only allows one thread at a time to access the resource. See: Locks on Wikipedia

    Semaphore demonstrates a semaphore for controlling access to a pool of resources. See Semaphores on Wikipedia

    The main class of both programs is App.java.

    I haven't created any documentation yet. Let me know if you want any changes or need some explanations of the code, etc.

    status: under review 
    opened by gwildor28 25
  • Java 11 support: Start using var

    Java 11 support: Start using var

    This task is part of the Java 11 transition plan https://github.com/iluwatar/java-design-patterns/wiki/16.-Java-11-Transition

    Start using local-variable type inference (var). It is a nice example of syntactic sugar that helps reduce boilerplate code (see https://www.infoq.com/articles/upgrading-java-8-to-12/ and https://winterbe.com/posts/2018/09/24/java-11-tutorial/)

    It's a huge task to do this for all the patterns at once so it is possible to create pull requests for individual patterns. This way we can complete the task gradually. The following checklist tracks which patterns have already been refactored.

    [x] abstract-document [x] abstract-factory [x] acyclic-visitor [x] adapter [x] aggregator-microservices [x] ambassador [x] api-gateway [x] async-method-invocation [x] balking [x] bridge [x] builder [x] business-delegate [x] bytecode [x] caching [x] callback [x] chain [x] circuit-breaker [x] collection-pipeline [x] command [x] commander [x] composite [x] converter [x] cqrs [x] dao [x] data-bus [x] data-locality [x] data-mapper [x] data-transfer-object [x] decorator [x] delegation [x] dependency-injection [x] dirty-flag [x] double-checked-locking [x] double-dispatch [x] eip-aggregator [x] eip-message-channel [x] eip-publish-subscribe [x] eip-splitter [x] eip-wire-tap [x] event-aggregator [x] event-asynchronous [x] event-driven-architecture [x] event-queue [x] event-sourcing [x] execute-around [x] extension-objects [x] facade [x] factory-kit [x] factory-method [x] feature-toggle [x] fluentinterface [x] flux [x] flyweight [x] front-controller [x] guarded-suspension [x] half-sync-half-async [x] hexagonal [x] intercepting-filter [x] interpreter [x] iterator [x] layers [x] lazy-loading [x] leader-election [x] marker [x] master-worker-pattern [x] mediator [x] memento [x] model-view-controller [x] model-view-presenter [x] module [x] monad [x] monostate [x] multiton [x] mute-idiom [x] mutex [x] naked-objects [x] null-object [x] object-mother [x] object-pool [x] observer [x] page-object [x] partial-response [x] pipeline [x] poison-pill [x] priority-queue [x] private-class-data [x] producer-consumer [x] promise [x] property [x] prototype [x] proxy [x] queue-load-leveling [x] reactor [x] reader-writer-lock [x] repository [x] resource-acquisition-is-initialization [x] retry [x] role-object [x] semaphore [x] servant [x] serverless [x] service-layer [x] service-locator [x] singleton [x] spatial-partition [x] specification [x] state [x] step-builder [x] strategy [x] template-method [x] thread-pool [x] throttling [x] tls [x] tolerant-reader [x] trampoline [x] twin [x] typeobjectpattern [x] unit-of-work [x] value-object [x] visitor

    status: under construction type: enhancement info: good first issue info: hacktoberfest resolution: fixed 
    opened by iluwatar 24
  • SonarQube reports code smells

    SonarQube reports code smells

    Java Design Patterns is analyzed with SonarQube.com static analysis. The analysis shows some blocker level code smells that should be fixed:

    https://sonarqube.com/component_issues/index?id=com.iluwatar%3Ajava-design-patterns#resolved=false|severities=BLOCKER|types=CODE_SMELL

    type: bug status: under construction info: good first issue info: hacktoberfest 
    opened by iluwatar 23
  • Hexagonal blog

    Hexagonal blog

    This is a pull request for a blog post about Hexagonal Architecture. The code samples have been embedded using gist-it. Looking forward to your comments.

    status: under review 
    opened by iluwatar 23
  • Better View/Navigation ?

    Better View/Navigation ?

    Heya there, first of all, i love this resource and use it quite often. the only thing slightly annoying is the layout. Would be really awesome to view this resource in bootstrap with categories or something like that.

    If something like that is done "hardcoded" the project will probably loose on contributions, so a converter of sorts should be used.

    One last point, i found this Site that looks pretty good, but i dont know if it would be suitable. I also have no idea if it even works, because here everything is one single markdown document, while those at the site are multiple. http://phpmyadmin.readthedocs.org/en/QA_4_4/ (topic is not important)

    Just an idea C:

    ~Markus

    status: under construction type: enhancement epic: web site 
    opened by markusmo3 22
  • Introduce Lombok to get rid of boilerplate

    Introduce Lombok to get rid of boilerplate

    Project Lombok enables using of annotations to generate code. Let's introduce it to the project to reduce amount of boilerplate. In the first stage we could utilize the simplest annotations like @Getter @Setter @Slf4j @ToString @EqualsAndHashCode. I think the more advanced ones sacrifice code readability and should be avoided.

    status: under construction type: refactoring resolution: fixed priority: normal epic: code quality 
    opened by iluwatar 21
  • Sonar report - fix blocker and critical ones

    Sonar report - fix blocker and critical ones

    Change description :-

    • fixed Sonar blocker and critical issues related to duplicate String literals
    • Refer to the issue that it solves, if available

    Pull request description

    • fixed Sonar blocker and critical issues related to duplicate String literals
    • removed unnecessary empty default constructor
    status: under review 
    opened by interactwithankush 20
  • Update JVM version to the latest stable release

    Update JVM version to the latest stable release

    As the end of support of JVM 11 would be in exactly 1 year (September 2023) this repository should probably consider moving to the next stable JVM release (JVM 17) while adopting the features that have been introduced in it to update the existing patterns.

    like to Oracle’s page regarding support versions: https://www.oracle.com/java/technologies/java-se-support-roadmap.html

    info: help wanted epic: build issue epic: dependencies type: task priority: high 
    opened by yonatankarp 3
  • Sunsetting EIPs and cloud patterns from this repository

    Sunsetting EIPs and cloud patterns from this repository

    In the future, we want to concentrate on pure Java design patterns. Implementing EIPs requires an asynchronous messaging framework, and there are plenty of those. Similarly, implementing cloud design patterns requires a cloud platform. Basically, one could create a new repository for each technology choice e.g. camel-enterprise-integration-patterns, spring-enterprise-integration-patterns, aws-cloud-design-patterns, etc. If anyone is interested, go ahead and use one these ideas, you have my full support.

    Acceptance criteria

    • Remove the enterprise integrations patterns (eip-*) from this repository
    • Remove the cloud design patterns (cloud-*) from this repository
    • Clean up the parent pom.xml from the removed modules, dependencies, and plugins that are no longer needed
    info: help wanted epic: pattern info: good first issue info: hacktoberfest type: task priority: normal 
    opened by iluwatar 2
  • A Chinese grammar error in zh version README.md.

    A Chinese grammar error in zh version README.md.

    Line 35, the second bracket contains a redundant Chinese character “为”, which should be removed from bracket and put in front of the remain words. "为" is a preposition, while the meaning of the word in the bracket should be a noun. Anyone who is familar with Chinese will find this problem.

    在第35行,第二个网页超链接处,中括号包含了一个多余的汉字“为”。应该将这个汉字移出中括号。

    opened by YichuanSun 2
  • build(deps): bump mongo-java-driver from 3.12.1 to 3.12.8

    build(deps): bump mongo-java-driver from 3.12.1 to 3.12.8

    Bumps mongo-java-driver from 3.12.1 to 3.12.8.

    Release notes

    Sourced from mongo-java-driver's releases.

    Java Driver 3.12.8 (February 18, 2021)

    Release Notes: https://developer.mongodb.com/community/forums/t/mongodb-java-driver-3-12-8-released/16823

    Java Driver 3.12.6 (July 8, 2020)

    Release Notes: https://developer.mongodb.com/community/forums/t/mongodb-java-driver-3-12-6-released/6448/2

    Java Driver 3.12.5 (June 2, 2020)

    Release Notes: https://developer.mongodb.com/community/forums/t/mongodb-java-driver-3-12-5-released/4886

    3.12.4

    Java Driver 3.12.3 (April 7, 2020)

    Release Notes: https://developer.mongodb.com/community/forums/t/mongodb-java-driver-3-12-4-released/3953

    3.12.3

    Java Driver 3.12.3 (April 7, 2020)

    Release Notes: https://community.mongodb.com/t/mongodb-java-driver-3-12-3-released/2510/2

    3.12.2

    Java Driver 3.12.2 (March 4, 2020)

    The 3.12.2 MongoDB Java Driver is a patch to the 3.12.1 release.

    Reference documentation

    The documentation hub includes extensive documentation of the 3.12 driver, including

    and much more.

    Bug fixes

    You can find a full list of bug fixes here.

    API Documentation

    http://mongodb.github.io/mongo-java-driver/3.12/javadoc/

    Commits
    • eb2ae25 Bump to 3.12.8
    • ae5b1c0 Fix CVE-2021-20328
    • 32052a1 Skip test if multi-mongos connection string is null
    • 504c000 Default to Java 8 in run-tests.sh
    • 491e1c4 Ignore test of $explain modifier on sharded clusters after 4.4
    • acb17d0 Limit geoHaystack index testing to MongoDB 4.4 and below
    • 351b524 Use keyvault database for FLE tests
    • 9ea346b Backport a fix of the read timeout implementation in NettyStream
    • 0b0ffc3 Ensure that resumeToken is included on resume attempts (#634)
    • 0e556f1 Ensure DNS errors bubble up as errors in reactive streams
    • Additional commits viewable in compare view

    Dependabot compatibility score

    Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.


    Dependabot commands and options

    You can trigger Dependabot actions by commenting on this PR:

    • @dependabot rebase will rebase this PR
    • @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
    • @dependabot merge will merge this PR after your CI passes on it
    • @dependabot squash and merge will squash and merge this PR after your CI passes on it
    • @dependabot cancel merge will cancel a previously requested merge and block automerging
    • @dependabot reopen will reopen this PR if it is closed
    • @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
    • @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
    • @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
    • @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
    • @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
    • @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
    • @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
    • @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language

    You can disable automated security fix PRs for this repo from the Security Alerts page.

    epic: dependencies 
    opened by dependabot[bot] 0
  • Fix for issue 1281

    Fix for issue 1281

    Pull request title

    • Added Pessimistic Concurrency Pattern
    • Addresses #1281

    Pull request description

    • Implements Pessimistic Concurrency Pattern based on provided resource: http://ommolketab.ir/aaf-lib/axkwht7wxrhvgs2aqkxse8hihyu9zv.pdf chapter 10.2 & B-5

    For detailed contributing instructions see https://github.com/iluwatar/java-design-patterns/wiki/01.-How-to-contribute

    status: under review 
    opened by vithlaithla 1
Modern Java - A Guide to Java 8

Modern Java - A Guide to Java 8 This article was originally posted on my blog. You should also read my Java 11 Tutorial (including new language and AP

Benjamin Winterberg 16k Oct 1, 2022
Java EE 7 Samples

Java EE 7 Samples This workspace consists of Java EE 7 Samples and unit tests. They are categorized in different directories, one for each Technology/

JavaEE Samples 2.5k Sep 30, 2022
Solutions for some common algorithm problems written in Java.

Algorithms This repository contains my solution for common algorithms. I've created this repository to learn about algorithms and improve solutions to

Pedro Vicente Gómez Sánchez 2.7k Sep 27, 2022
MCQs and coding questions solutions of Object-Oriented Programming java of coding ninjas

cn-java-sols (⌐■_■) Link to This repository Other similar repository of my friend Link ?? enjoy having full marks ?? ?? now answers avaible up to Stri

Sanyam Mahajan 9 Aug 8, 2022
Rework of html-java-dsl to work with newer Javas

java-html-dsl Example DSL for writing html in Java. Rework of benjiman/java-html-dsl to work with newer versions of Java This String doc = html(

Benji Weber 19 Jan 25, 2022
A toolchain for Minecraft: Java Edition that builds a workspace to interact with the game using the official mappings provided to the public by Mojang Studios.

VanillaGradle is a toolchain for Minecraft: Java Edition that provides a workspace to interact with the game using official mappings provided by Mojan

SpongePowered 69 Aug 25, 2022
Amazing Ruby's "Enumerable" ported to Java

Overview How to use? .all .any .none .select .map .count .reject .find How to contribute? Contributors Overview enumerable4j is a Ruby's well known En

Yurii Dubinka 29 Feb 17, 2022
Java 16 Features

Java 16 Features. Features are separated by package name.

Rahman Usta 9 Jan 7, 2022
Java Kampında derslerde yazılan projeler

nLayeredDemo JavaCampDay5Lesson https://www.youtube.com/watch?v=yaBPeS65vwM&ab_channel=EnginDemiro%C4%9F linkteki derste yapılan proje. Nortwind JavaC

Zeyneb Eda YILMAZ 10 Dec 14, 2021
Engin DEMIROG yotube java kamp HW

JavaBootCamp https://www.kodlama.io/courses/enrolled/1332369 Engin DEMIROG yotube javaBootCamp HW ve projeler Java & React Bootcamp (https://kodlama.i

Melik KARACA 9 Aug 19, 2022
Software Developer Training Camp (JAVA + REACT) works under the guidance of Engin Demiroğ

https://kodlama.io/p/yazilim-gelistirici-yetistirme-kampi2 [EN] Java_React-BootCamp Software Developer Training Camp (JAVA + REACT) works under the gu

Saba ÜRGÜP 19 Mar 3, 2022
A Java game Solitaire, made with JavaFX

Java Solitaire A game made with JavaFX Installation requirements: At least Java 11 installed. setup: 2.1. Intellij -> Open the file in the IDE and exe

Walter Alleyz 15 May 6, 2021
Bitcoin SV Library for Java

Introduction Overview Bitcoin4J is a Bitcoin library for the Java Language licensed under the Apache License 2.0. This library has been built in line

null 17 May 25, 2022
Repository for Bryn and Ethan's Java with MicroServices Batch

210607-FeederProgram This repository houses examples and environment setup for the Revature feeder program beginning on 6/7/2021 Environment Setup Gui

Bryn Portella 17 May 22, 2022
http://kodlama.io "Java & React Bootcamp" up to date Lectures and Homeworks.

Java & React Bootcamp (https://kodlama.io/) Lectures Lecture 1 intro Lecture 2 oopIntro homework Lecture 3 oopIntro2 inheritance inheritance2 homework

Karcan Ozbal 243 Jun 30, 2022
Códigos do Bootcamp Java Básico DIO

Curso Java Básico Digital Innovation One https://digitalinnovation.one Tive a honra de fazer parceria com o pessoal da Digital Innovation One, com doi

Nicole Bidigaray 3 Jul 28, 2021
Slicer4J is an accurate, low-overhead dynamic slicer for Java programs.

Slicer4J This repository hosts Slicer4J, an accurate, low-overhead dynamic slicer for Java programs. Slicer4J automatically generates a backward dynam

The Reliable, Secure, and Sustainable Software Lab 24 Sep 29, 2022
Ejercicios de CodeSignal resueltos en Java

CodeSignal Ejercicios resueltos en Java de la plataforma CodeSignal. Crear el proyecto con Maven Abrimos un terminal y ejecutamos el siguiente comando

Desarrollo de Interfaces (DAD) 3 Sep 21, 2021
Java Coding Practice

Java Coding Practice I have solved many problems in this, Some of them are Median of Two Sorted Arrays Merge k Sorted Lists First Missing Positive Val

null 10 Nov 12, 2021