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Design patterns implemented in Java https://java-design-patterns.com

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allcontributors[bot] ede37bd055 docs: add e5LA as a contributor for doc (#3281 ) * docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>		2025-05-17 08:55:06 +03:00
.github	feat: Java 21 update (#3213 )	2025-03-25 18:28:33 +02:00
.mvn/wrapper	deps: update maven	2024-03-27 20:09:01 +02:00
abstract-document	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
abstract-factory	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
active-object	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
actor-model	feat: Implement Actor Model pattern	2025-04-22 21:29:58 +03:00
acyclic-visitor	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
adapter	docs: add adapter sequence diagram	2025-04-05 20:20:12 +03:00
ambassador	docs: add ambassador sequence diagram	2025-04-05 20:33:19 +03:00
anti-corruption-layer	docs: add anti-corruption layer sequence diagram	2025-04-05 20:41:32 +03:00
arrange-act-assert	docs: add arrange/act/assert flowchart	2025-04-05 20:55:10 +03:00
async-method-invocation	docs: add async method invocation sequence diagram	2025-04-05 21:10:41 +03:00
backpressure	docs: update backpressure description	2025-04-12 15:09:24 +03:00
balking	docs: balking, bloc, bridge diagrams	2025-04-06 08:27:22 +03:00
bloc	docs: update bloc pattern	2025-04-12 19:26:46 +03:00
bridge	docs: balking, bloc, bridge diagrams	2025-04-06 08:27:22 +03:00
builder	docs: builder, business-delegate, bytecode, caching, callback, chain diagrams	2025-04-06 09:00:19 +03:00
business-delegate	docs: builder, business-delegate, bytecode, caching, callback, chain diagrams	2025-04-06 09:00:19 +03:00
bytecode	docs: builder, business-delegate, bytecode, caching, callback, chain diagrams	2025-04-06 09:00:19 +03:00
caching	docs: builder, business-delegate, bytecode, caching, callback, chain diagrams	2025-04-06 09:00:19 +03:00
callback	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
chain-of-responsibility	docs: builder, business-delegate, bytecode, caching, callback, chain diagrams	2025-04-06 09:00:19 +03:00
circuit-breaker	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
clean-architecture	docs: update clean architecture	2025-04-13 21:26:14 +03:00
client-session	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
collecting-parameter	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
collection-pipeline	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
combinator	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
command	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
command-query-responsibility-segregation	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
commander	build(deps): bump org.apache.maven.plugins:maven-compiler-plugin (#3246 )	2025-04-08 20:08:06 +03:00
component	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
composite	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
composite-entity	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
composite-view	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
context-object	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
converter	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
curiously-recurring-template-pattern	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
currying	docs: diagrams for callback, circuit breaker, client session, collecting parameter, colletion pipeline, combinator, command, commander, component, composite entity, composite view, composite, context object, converter, crtp, currying	2025-04-06 11:31:49 +03:00
data-access-object	docs: remove some old diagrams	2025-04-22 07:56:11 +03:00
data-bus	docs: add diagrams for dao, data bus, data locality, data mapper, dto	2025-04-06 13:08:08 +03:00
data-locality	docs: remove some old diagrams	2025-04-22 07:56:11 +03:00
data-mapper	docs: add diagrams for dao, data bus, data locality, data mapper, dto	2025-04-06 13:08:08 +03:00
data-transfer-object	docs: add diagrams for dao, data bus, data locality, data mapper, dto	2025-04-06 13:08:08 +03:00
decorator	docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy	2025-04-06 15:52:26 +03:00
delegation	docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy	2025-04-06 15:52:26 +03:00
dependency-injection	docs: update dependency injection	2025-04-26 23:14:07 +03:00
dirty-flag	docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy	2025-04-06 15:52:26 +03:00
domain-model	docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy	2025-04-06 15:52:26 +03:00
double-buffer	docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy	2025-04-06 15:52:26 +03:00
double-checked-locking	docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy	2025-04-06 15:52:26 +03:00
double-dispatch	docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy	2025-04-06 15:52:26 +03:00
dynamic-proxy	build(deps): bump com.fasterxml.jackson.core:jackson-core (#3270 )	2025-05-01 10:02:39 +03:00
event-aggregator	docs: add diagrams for event aggregator, event-based asynchronous, event queue, execute around, extension objects	2025-04-06 18:36:32 +03:00
event-based-asynchronous	docs: add diagrams for event aggregator, event-based asynchronous, event queue, execute around, extension objects	2025-04-06 18:36:32 +03:00
event-driven-architecture	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
event-queue	docs: add diagrams for event aggregator, event-based asynchronous, event queue, execute around, extension objects	2025-04-06 18:36:32 +03:00
event-sourcing	build(deps): bump com.fasterxml.jackson.core:jackson-core (#3270 )	2025-05-01 10:02:39 +03:00
execute-around	docs: add diagrams for event aggregator, event-based asynchronous, event queue, execute around, extension objects	2025-04-06 18:36:32 +03:00
extension-objects	docs: add diagrams for event aggregator, event-based asynchronous, event queue, execute around, extension objects	2025-04-06 18:36:32 +03:00
facade	docs: update backpressure description	2025-04-12 15:09:24 +03:00
factory	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
factory-kit	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
factory-method	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
fanout-fanin	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
feature-toggle	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
filterer	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
fluent-interface	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
flux	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
flyweight	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
front-controller	docs: add diagrams for facade, factory kit, factory method, factory, fan-out/fan-in, feature toggle, filterer, fluent interface, flyweight, front controller, function composition	2025-04-06 19:10:43 +03:00
function-composition	docs: update function composition pattern	2025-04-12 16:11:03 +03:00
game-loop	docs: add new diagrams for game loop, gateway, guarded suspension, half-sync/half-async, health check	2025-04-06 20:55:07 +03:00
gateway	docs: add new diagrams for game loop, gateway, guarded suspension, half-sync/half-async, health check	2025-04-06 20:55:07 +03:00
guarded-suspension	docs: add new diagrams for game loop, gateway, guarded suspension, half-sync/half-async, health check	2025-04-06 20:55:07 +03:00
half-sync-half-async	docs: add new diagrams for game loop, gateway, guarded suspension, half-sync/half-async, health check	2025-04-06 20:55:07 +03:00
health-check	docs: add new diagrams for game loop, gateway, guarded suspension, half-sync/half-async, health check	2025-04-06 20:55:07 +03:00
hexagonal-architecture	build(deps-dev): bump de.flapdoodle.embed:de.flapdoodle.embed.mongo (#3248 )	2025-04-08 20:08:51 +03:00
identity-map	docs: add diagrams for identity map, intercepting filter, interpreter, iterator	2025-04-06 21:11:20 +03:00
intercepting-filter	docs: add diagrams for identity map, intercepting filter, interpreter, iterator	2025-04-06 21:11:20 +03:00
interpreter	docs: add diagrams for identity map, intercepting filter, interpreter, iterator	2025-04-06 21:11:20 +03:00
iterator	docs: add diagrams for identity map, intercepting filter, interpreter, iterator	2025-04-06 21:11:20 +03:00
layered-architecture	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
lazy-loading	docs: add diagrams for lazy loading, leader election, leader followers, lockable object	2025-04-06 21:22:32 +03:00
leader-election	docs: add diagrams for lazy loading, leader election, leader followers, lockable object	2025-04-06 21:22:32 +03:00
leader-followers	chore: adding missing license (#3273 )	2025-05-17 08:53:25 +03:00
localization	translation: Translate selected patterns to persian (#3256 )	2025-04-22 21:55:07 +03:00
lockable-object	docs: add diagrams for lazy loading, leader election, leader followers, lockable object	2025-04-06 21:22:32 +03:00
map-reduce	docs: updates for MapReduce	2025-04-12 16:40:17 +03:00
marker-interface	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
master-worker	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
mediator	docs: update backpressure description	2025-04-12 15:09:24 +03:00
memento	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
metadata-mapping	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
microservices-aggregrator	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
microservices-api-gateway	docs: update client-side ui composition	2025-04-12 18:25:26 +03:00
microservices-client-side-ui-composition	docs: update client-side ui composition	2025-04-12 18:25:26 +03:00
microservices-distributed-tracing	build(deps): bump io.micrometer:micrometer-tracing-bridge-brave (#3253 )	2025-04-15 18:09:55 +03:00
microservices-idempotent-consumer	docs: update microservices idempotent consumer	2025-04-14 20:13:14 +03:00
microservices-log-aggregation	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
model-view-controller	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
model-view-intent	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
model-view-presenter	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
model-view-viewmodel	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
monad	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
money	fix: fix code formatting	2025-04-14 20:54:05 +03:00
monitor	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
monolithic-architecture	docs: update monolithic architecture	2025-04-15 19:50:02 +03:00
monostate	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
multiton	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
mute-idiom	docs: add diagrams for marker interface, master-worker, mediator, memento, metadata mapping, microservices api gateway, microservices log aggregation, monad, monitor, monostate, multiton, mute idiom	2025-04-07 22:14:20 +03:00
naked-objects	docs: add naked objects architecture diagram	2025-03-09 18:48:14 +02:00
notification	docs: add notification diagram	2025-04-09 21:27:42 +03:00
null-object	docs: null object diagram	2025-04-09 21:30:44 +03:00
object-mother	docs: object mother diagrams	2025-04-09 21:31:04 +03:00
object-pool	docs: object pool and observer diagrams	2025-04-09 21:31:30 +03:00
observer	docs: update backpressure description	2025-04-12 15:09:24 +03:00
optimistic-offline-lock	docs: optimistic offline lock diagram	2025-04-09 21:31:50 +03:00
page-controller	deps: Refactor dependencies (#3224 )	2025-03-29 19:34:27 +02:00
page-object	docs: page object and parameter object diagrams	2025-04-09 21:32:13 +03:00
parameter-object	docs: page object and parameter object diagrams	2025-04-09 21:32:13 +03:00
partial-response	docs: partial response and pipeline diagrams	2025-04-09 21:32:41 +03:00
pipeline	docs: partial response and pipeline diagrams	2025-04-09 21:32:41 +03:00
poison-pill	docs: poison pill and private class data diagrams	2025-04-09 21:33:13 +03:00
presentation-model	docs: poison pill and private class data diagrams	2025-04-09 21:33:13 +03:00
private-class-data	docs: poison pill and private class data diagrams	2025-04-09 21:33:13 +03:00
producer-consumer	docs: update producer-consumer	2025-05-02 21:55:44 +03:00
promise	docs: producer-consumer and promise diagrams	2025-04-09 21:33:39 +03:00
property	docs: property, prototype, proxy diagrams	2025-04-09 21:34:01 +03:00
prototype	docs: update prototype	2025-05-02 22:02:40 +03:00
proxy	docs: update backpressure description	2025-04-12 15:09:24 +03:00
publish-subscribe	docs: update publish-subscribe	2025-04-15 20:36:32 +03:00
queue-based-load-leveling	docs: queue-based load leveling diagram	2025-04-09 21:40:18 +03:00
reactor	docs: reactor diagram	2025-04-09 21:49:23 +03:00
registry	docs: registry diagram	2025-04-09 21:54:13 +03:00
repository	docs: repository diagram	2025-04-09 21:57:39 +03:00
resource-acquisition-is-initialization	docs: raii diagram	2025-04-09 22:01:29 +03:00
retry	docs: retry and role object diagrams	2025-04-09 22:09:38 +03:00
role-object	docs: retry and role object diagrams	2025-04-09 22:09:38 +03:00
saga	docs: add saga flowchart	2025-04-10 20:03:04 +03:00
separated-interface	docs: separated interface diagram	2025-04-10 20:11:01 +03:00
serialized-entity	docs: diagrams for serialized entity and serialized lob	2025-04-10 20:20:47 +03:00
serialized-lob	docs: diagrams for serialized entity and serialized lob	2025-04-10 20:20:47 +03:00
servant	docs: diagrams for servant and server session	2025-04-10 20:29:05 +03:00
server-session	docs: diagrams for servant and server session	2025-04-10 20:29:05 +03:00
service-layer	docs: service locator and service stub diagrams	2025-04-10 20:35:28 +03:00
service-locator	docs: service locator and service stub diagrams	2025-04-10 20:35:28 +03:00
service-stub	docs: update service stub	2025-04-15 21:24:13 +03:00
service-to-worker	docs: service to worker, session facade, sharding diagrams	2025-04-10 20:43:16 +03:00
session-facade	docs: update session facade	2025-04-15 21:48:41 +03:00
sharding	docs: service to worker, session facade, sharding diagrams	2025-04-10 20:43:16 +03:00
single-table-inheritance	docs: single table inheritance and singleton diagrams	2025-04-10 20:48:39 +03:00
singleton	docs: single table inheritance and singleton diagrams	2025-04-10 20:48:39 +03:00
spatial-partition	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
special-case	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
specification	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
state	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
step-builder	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
strangler	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
strategy	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
subclass-sandbox	docs: add diagrams for spatial partition, special case, specification, state, step builder, strangler, strategy, subclass sandbox	2025-04-10 21:13:17 +03:00
table-inheritance	docs: update table inheritance	2025-04-15 22:29:23 +03:00
table-module	docs: diagrams for table module and template method	2025-04-12 09:09:44 +03:00
template-method	docs: diagrams for table module and template method	2025-04-12 09:09:44 +03:00
templateview	docs: new diagrams for template view and throttling	2025-04-12 09:17:38 +03:00
thread-pool-executor	feat: Implement Thread-Pool Executor pattern (#3271 )	2025-05-15 21:53:37 +03:00
throttling	docs: new diagrams for template view and throttling	2025-04-12 09:17:38 +03:00
tolerant-reader	docs: updated diagrams for tolerant reader and trampoline	2025-04-12 09:23:46 +03:00
trampoline	docs: updated diagrams for tolerant reader and trampoline	2025-04-12 09:23:46 +03:00
transaction-script	docs: diagrams for transaction script, twin, and type object	2025-04-12 09:35:40 +03:00
twin	docs: diagrams for transaction script, twin, and type object	2025-04-12 09:35:40 +03:00
type-object	docs: diagrams for transaction script, twin, and type object	2025-04-12 09:35:40 +03:00
unit-of-work	docs: diagrams for unit of work, update method, and value object	2025-04-12 09:49:08 +03:00
update-method	docs: diagrams for unit of work, update method, and value object	2025-04-12 09:49:08 +03:00
value-object	docs: diagrams for unit of work, update method, and value object	2025-04-12 09:49:08 +03:00
version-number	docs: diagrams for version number, virtual proxy, visitor	2025-04-12 09:58:48 +03:00
virtual-proxy	docs: diagrams for version number, virtual proxy, visitor	2025-04-12 09:58:48 +03:00
visitor	docs: diagrams for version number, virtual proxy, visitor	2025-04-12 09:58:48 +03:00
.all-contributorsrc	docs: add e5LA as a contributor for doc (#3281 )	2025-05-17 08:55:06 +03:00
.editorconfig	docs: update .editorconfig and reformat readmes	2024-03-31 18:01:06 +03:00
.gitignore	docs: update tolerant reader	2024-05-22 15:40:55 +03:00
checkstyle-suppressions.xml	dependencies: #2449 bump maven-checkstyle-plugin from 3.1.0 to 3.2.0 + resolve chec… (#2464 )	2023-02-04 19:20:54 +02:00
CONTRIBUTING.MD	docs: update contributing.md	2024-04-08 21:27:11 +03:00
lgpl-3.0.txt	Update license plugin (#2020 )	2022-09-14 23:22:24 +05:30
LICENSE.md	dcos: update license years	2024-04-08 21:01:38 +03:00
lombok.config	refactoring: Refactor the prototype pattern to avoid code duplications (Closes #584 ) (#1970 )	2022-09-08 15:55:02 +03:00
mvnw	task: Update Maven version (#1949 )	2022-01-24 21:57:02 +05:30
mvnw.cmd	task: Update Maven version (#1949 )	2022-01-24 21:57:02 +05:30
pom.xml	feat: Implement Thread-Pool Executor pattern (#3271 )	2025-05-15 21:53:37 +03:00
PULL_REQUEST_TEMPLATE.md	doc: Update PR template	2025-01-12 19:03:56 +02:00
README.md	docs: add e5LA as a contributor for doc (#3281 )	2025-05-17 08:55:06 +03:00

README.md

Design Patterns Implemented in Java

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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 helps 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 of 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 while 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.

The Book

The design patterns are now available as an e-book. Find out more about "Open Source Java Design Patterns" here: https://payhip.com/b/bNQFX

The project contributors can get the book for free. Contact the maintainer via Gitter chatroom or email (iluwatar (at) gmail (dot) com ). Send a message that contains your email address, Github username, and a link to an accepted pull request.

License

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

Contributors

_{Ilkka Seppälä} 📆 🚧 🖋	_{Subhrodip Mohanta} 💻 👀 🚧	_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 👀 🤔	_{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} 💻	_{yonghong Xu} 📖	_jinishavora 👀 💻	_{Elvys Soares} 💻	_zWeBrain 💻	_余林颖 🌍
_Alain 🌍	_VR 📖	_JackieNim 💻	_EdisonE3 💻	_Tao 💻	_{Juan Manuel Abate} 🌍
_Xenilo137 💻	_{Samuel Souza} 💻 📖	_{Marlo Henrique} 🌍	_AndriyPyzh 💻	_{karthikbhat13} 💻	_{Morteza Adigozalpour} 💻
_{Nagaraj Tantri} 💻	_{Francesco Scuccimarri} 💻	_{Conny Hansson} 📖	_{Muklas Rahmanto} 🌍	_Vadim 🌍	_{Simran Keshri} 💻
_JCarlos 🌍	_{Ali Ghasemi} 💻	_{Carl Dea} 💻	_Mozartus 🌍	_{Manvi Goel} 📖	_{Anum Amin} 📖
_{Reo Uehara} 🌍	_Fiordy 📖	_Harshal 💻	_{Abhinav Vashisth} 📖	_Kevin 👀 💻	_Shrirang 👀 💻
_{interactwithankush} 💻	_CharlieYu 💻	_{Leisterbecker} 💻	_{DragonDreamer} 💻	_{ShivanshCharak} 💻	_HattoriHenzo 💻
_{Arnab Sen} 💻	_{MohanaRao SV} 💻	_{Yonatan Karp-Rudin} 💻 👀	_Oliani 💻	_{Renjie LIU} 💻	_{perfect guy} 📖
_xyllq999 💻	_{Mohamed Bilal} 📖	_{Karshil sheth} 💻	_kongleong86 💻	_{Aitor Fidalgo Sánchez} 🌍 📖 👀	_{Victor He} 💻
_{Minh Nguyen} 🌍 📖	_{Victor He} 📖	_yiichan 📖	_{Pan Sem} 📖	_zhoumengyks 💻	_you 🌍
_Thanks 🌍	_{LazyProgrammer} 📖	_{Mohammed Faizan Ahmed} 📖	_{Bruno Fernandes} 💻	_SammanPali 📖	_{Qixiang Chen} 📖
_{Shourya Manekar} 🌍	_Alan 🌍	_JanFidor 💻 📖	_{Anton Yakutovich} 💻	_steph88ss 📖	_{Yujan Ranjitkar} 🌍
_yusha-g 🌍	_{Robert Volkmann} 💻 👀	_{Bipin Kumar Chaurasia} 📖	_KyleSong30 📖	_u7281975 📖	_{harshalkhachane} 💻
_{Tejas Singh} 📖 🌍	_{Sudarsan Balaji} 💻	_{Vaibhav Agrawal} 📖	_u7275858 💻	_prasad-333 📖	_JurenXu 💻
_murphShaw 📖	_XianWu99 📖	_{JoshuaSinglaANU} 💻	_{Ricardo Ramos} 🌍	_{Farid Zouheir} 🌍	_{Vinícius A. B.} 🌍
_{Stefanel Stan} 💻	_{Prince bhati} 🌍	_WuLang 📖	_{Hugo Kat} 💻	_{Shivanagouda Agasimani} 💻	_Aparna 💻
_{Girolamo Giordano} 🌍	_Chak-C 💻	_{Nakul Nambiar} 💻	_{KarmaTashiCat} 🌍	_marikattt 💻	_{Hashvardhan Parmar} 🌍
_YongHwan 📖 🌍	_{Shogo Hida} 🌍	_Eugene 💻	_Piyush 📖	_{Rahul Raj} 💻	_{Bharath Kalyan S} 💻
_{Saiteja Reddy} 🌍	_{Enrique Clerici} 🌍	_{Ramil Sayetov} 🌍	_东方未白 💻	_{Fredrik Sejr} 🌍	_{akshatarora0013} 💻
_{Mughees Qasim} 💻	_behappyleee 🌍	_{Ayush Thakur} 🌍	_{Anthony Bosch} 💻	_trananso 📖	_{Giammaria Biffi} 🌍
_{Saiful Haque} 💻	_JabezBrew 💻	_{konstantin-goldman} 📖	_{Tien Nguyen Minh} 💻 🌍	_Vladimir 🌍	_Surjendu 🌍 💻
_bakazhou 💻	_{Owen Leung} 💻	_{Stavros Barousis} 📖	_{Syyed Ibrahim Abdullah} 🌍	_{JiaDi Zhang} 🌍	_{Sanchit Bansal} 📖
_{Md Saiful Islam} 📖	_{Antonio Addeo} 📖 💻	_{Allagadda Sai Upendranath} 📖	_{Matheus Braga} 🌍 📖	_{Appari Satya Barghav} 📖	_{Marcel Ribeiro-Dantas} 📖
_{Muhammad Hanif Amrullah} 🌍	_JackH408 📖	_Shubham 🌍	_{Nishant Jain} 📖	_{Rhitam Chaudhury} 📖	_JerryZhao275 📖
_{Leonardo Lisanti} 🌍	_{Yennifer Herrera} 🌍 👀	_jnniu-n 🌍 📖	_{Miguel Angel Perez Garcia} 👀 🌍	_{Suwan Sankaja} 🌍	_alok 📖
_{Daniel Lisboa} 🌍	_{Sam Powell} 📖	_{João Fernandes} 🌍	_{Hong Geon-ui} 🌍	_Doksanbir 💻 📖 👀	_Chant3ll3 📖 🌍
_{YongHwan Kwon} 💻	_{Jakub Klimek} 💻	_believe 🌍	_{egg0102030405} 🌍 📖	_{Ved Asole} 💻	_NewMorning 🌍
_{资深老萌新} 🌍	_{Seunghwan Jeon} 🌍	_sugavanesh 💻	_FinnS-F 💻	_jerryyummy 🌍	_{Manoj Chowdary} 💻
_Aditya 📖 💻	_nooynayr 📖	_CYBERCRUX2 📖	_{Luis Mateo Hincapié Martinez} 🌍 👀	_guqing 💻	_{Sashir Estela} 💻
_omahs 📖	_{leif e.} 💻	_{Jun Kang} 💻	_{Kishalay Pandey} 💻	_drishtii7 💻	_{David Medina Orozco} 🌍 👀
_{Roman Leontev} 💻	_Riley 💻	_k1w1dev 💻	_dev-yugantar 💻	_Adelya 💻	_{gatlanagaprasanna} 📖
_{Avinash Shukla} 💻	_{Mayank Choudhary} 💻	_romannimets 💻	_Joel 💻	_{Walyson Moises} 💻	_Xcyq 💻
_Ritabrata 👀	_{Trivikram Kamat} 💻	_{Vincent Vanghelle} 🌍	_{Antoine Héritier} 🌍	_QinShower 🌍	_{LakshyaPunyani-01} 💻
_jasonjyu 💻	_jeffmorrison 💻	_{David M.} 💻	_{Patrick Kleindienst} 💻	_Juyeon 🌍	_{Mammad Yahyayev} 📖
_Salma 💻	_{Arpit Sarang} 💻	_Maya 🌍	_HabibaMekay 💻	_{Ahmed-Taha-981} 💻	_{Malak Elbanna} 💻
_BiKangNing 📖	_{Tarun Vishwakarma} 💻	_{Shahd Hossam} 💻	_{Mehdi Rahimi} 💻	_{Clint Airé} 💻	_darkhyper24 💻
_{Mohaned Atef} 💻	_{Maxim Evtush} 💻	_{Harshita Vidapanakal} 💻	_smile-ab 🌍 💻	_{Francisco-G-P} 🌍	_{Gabriel Duarte} 📖
_{Deniz Altunkapan} 🌍	_{John Klint} 💻	_{Sanura Hettiarachchi} 💻	_{Kim Gi Uk} 💻	_{Suchismita Deb} 💻	_{ssrijan-007-sys} 💻
_e5LA 💻 📖	_{Maziyar Gerami} 🌍	_{yoobin_mion} 💻