Repository Index

Learn Low Level Design (LLD) and prepare for interviews using free resources.

• awesome
• design-patterns
• interview
• interview-practice

Redisson: Valkey & Redis Java Client and Real-Time Data Platform. Sync/Async/RxJava/Reactive API. Extends Valkey and Redis with over 60 objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Spring, Tomcat, Scheduler, JCache API, Hibernate, RPC, local cache..

• java
• redis
• lock
• map

A Java serialization/deserialization library to convert Java Objects into JSON and back

🥤 COLA: Clean Object-oriented & Layered Architecture

• cola
• architecture
• clean

greenDAO is a light & fast ORM solution for Android that maps objects to SQLite databases.

A configuration as code language with rich validation and tooling.

• pkl
• java
• kotlin
• config

A Java to iOS Objective-C translation tool and runtime.

cglib - Byte Code Generation Library is high level API to generate and transform Java byte code. It is used by AOP, testing, data access frameworks to generate dynamic proxy objects and intercept field access.

A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.

• cross-language
• fast
• jit
• multiple-language

Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.

• java
• eclipse-collections
• java-collections
• collections

Intelligent object mapping

Distributed object store

MongoDB object-document mapper in Java based on https://github.com/mongodb/mongo-java-driver

• java
• kotlin
• mongodb
• odm

Writing SQL using Java syntax

• sql
• java
• orm
• objsql

A library that creates fully populated objects for your unit tests.

• java
• testing
• data-generator
• test-automation

NoSQL embedded document store for Java

• nosql
• embedded-database
• documentdb
• android

True Object-Oriented Java Web Framework without NULLs, Static Methods, Annotations, and Mutable Objects

• java
• web-framework
• xml-xslt
• http

Governator is a library of extensions and utilities that enhance Google Guice to provide: classpath scanning and automatic binding, lifecycle management, configuration to field mapping, field validation and parallelized object warmup.

Java 8 optimized, memory efficient, speedy template engine producing statically typed, plain java objects

• java
• templating
• web

Object-Oriented Java primitives, as an alternative to Google Guava and Apache Commons

• java
• oop
• java-library
• oop-principles

binary serialization format

• serialization
• serializable-objects
• cross-platform
• high-performance

Generator fake objects from a template

A fast object pool for the JVM

• java
• concurrency
• pool
• tdd

Convert Java to JSON/TOON and back. Supports complex object graphs, cyclic references, and TOON format for 40-50% LLM token savings. JDK 8+