code-examples VS Design Patterns

This is my filtered list of open-source projects that I use for learning: https://github.com/codurance/academy-walking-skeleton/blob/main/simpleWebservice/src/main/java/com/kata/SimpleWebservice/UserRepository.java https://github.com/bwajtr/java-persistence-frameworks-comparison https://github.com/thombergs/code-examples/tree/master/spring-boot/spring-boot-testing https://github.com/codurance/all-aboard-backend https://github.com/codurance/gandalf https://github.com/codurance/hotel-kata-boot https://github.com/codurance/hotel-kata-monolith https://github.com/codurance/hotel-kata-raw https://github.com/codurance/mementor https://github.com/codurance/pouch https://github.com/codurance/Retropolis-BE https://github.com/codurance/SalarySlipKata https://github.com/codurance/sessionize https://github.com/codurance/task-list https://github.com/ddd-by-examples/factory https://github.com/doctore/Spring5Microservices https://github.com/eventuate-examples/eventuate-examples-java-customers-and-orders https://github.com/gitpushforcemain/nerdy-jokes-app https://github.com/gothinkster/spring-boot-realworld-example-app https://github.com/gtiwari333/spring-boot-web-application-sample https://github.com/hamvocke/spring-testing https://github.com/hmcts/spring-boot-template https://github.com/IBM/template-java-spring https://github.com/isd-soft https://github.com/jitterted/mobreg https://github.com/jref/covid-19-demo https://github.com/jref/vaccination-start https://github.com/lpalma/merlin https://github.com/mechero/full-reactive-stack https://github.com/mohamed-taman/Springy-Store-Microservices https://github.com/nelkinda https://github.com/OlgaMaciaszek/spring-cloud-netflix-demo https://github.com/pavelfomin/spring-boot-rest-example https://github.com/PravSonawane/fakes-over-mocks https://github.com/remal/java-tools https://github.com/remal/oss-template-java-gradle https://github.com/pavelfomin/resume/blob/master/resume.html.pdf https://github.com/richardjwild/how-to-java https://github.com/rieckpil/java-testing-ecosystem https://github.com/rieckpil/testing-spring-boot-applications-masterclass https://spring.io/guides https://www.javaguides.net/2022/03/spring-boot-unit-testing-service-layer.html?spref=tw https://github.com/spring-petclinic https://github.com/stratospheric-dev/stratospheric https://github.com/tericcabrel/spring-user-management https://github.com/thombergs/buckpal https://github.com/Throyer/springboot-api-rest-example https://github.com/TomSpencerLondon/Quiz https://github.com/vladmihalcea/high-performance-java-persistence https://github.com/Vukan-Markovic/Distributed-information-systems https://github.com/yacekmm/testingDemo https://github.com/kamaruzzaman https://github.com/evrentan?tab=repositories https://github.com/ConstantinKV/demo-sca-provider https://github.com/sqshq/piggymetrics https://github.com/ESchouten/CleanArchitecture https://github.com/CodelyTV/java-ddd-example https://github.com/lsoares/clean-architecture-sample https://github.com/mattia-battiston/clean-architecture-example https://github.com/techyourchance https://github.com/ttulka/ddd-example-ecommerce-microservices https://github.com/ttulka/ddd-example-ecommerce https://github.com/victorrentea/clean-architecture https://github.com/victorrentea/clean-code-java https://github.com/victorrentea/ddd https://github.com/victorrentea/integration-testing-spring

you can check out some examples I use it now and then, you can also have a look at the official repository I think that you may find something there too

2. Java Design Patterns This repository showcases a collection of design patterns implemented in Java, making it a useful resource for learning how to apply design patterns in your projects. https://github.com/iluwatar/java-design-patterns

After that, more practice, and then Design Patterns (as in the famous book of the "Gang of Four": "Design Patterns: Elements of Reusable Object Oriented Software"). Here I'd recommend "Head First: Design Patterns" and Java Design Patterns as well as Refactoring Guru (the sites are more reference than course).

For Design Patterns - any resource recommendation that misses Java Design Patterns and Refactoring Guru (also for Refactoring) as well as *Head First: Design Patterns, has failed.

A massive list of design patterns and how they could be implemented (in Java) can be found here.

https://java-design-patterns.com/ has example code for things like object pools that can help with memory management.

Sidenote: I would not really use the GoF Design Patterns book anymore. Too dry. I would use "Head First: Design Patterns" - much more modern, much easier to read, or Refactoring Guru or Java Design Patterns (uses Java, but again, only for illustrations).

Also: https://java-design-patterns.com and https://refactoring.guru/design-patterns

Use either Java Design Patterns or Refactoring Guru. Both resources are far higher quality than yours.

Java Design Patterns

Java Design Patterns - IMO one of the most accessible sites with very easy explanations