iluwatar/java-design-patterns resource

Health v2 · maintenance only

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94625 stars · 27395 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A large open-source collection of classic and modern software design patterns implemented in Java, with well-commented source code examples, software design principles, and reusable Java 17 code snippets. It serves as a browsable tutorial catalog for learning object-oriented design practices.

Use cases

• learn how to implement the singleton pattern in java
• find a java example of the observer pattern
• study software design principles before an interview
• browse copy-pasteable java code snippets
• understand the difference between factory and abstract factory patterns
• teach design patterns in a software engineering course

When to choose

• you want well-commented, runnable Java examples of design patterns
• you are learning or teaching object-oriented design
• you need reference implementations to guide refactoring toward idiomatic patterns

When to avoid

• you need a production library to import rather than educational example code
• you work in a language other than Java
• you need a formal design-pattern certification or textbook-only material

Facets

learning-resource · maturity active

developer-tools documentation developer-tools tutorials programming-languages jvm design-patterns java code-snippets educational object-oriented-design

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