Any library you would like to recommend to others as it helps you a lot? For me, mapstruct is one of them. Hopefully I would hear some other nice libraries I never try.

• javawriter

  10 10,812 5.9 Java

  A Java API for generating .java source files.

  

  Javapoet. This helped me a lot, because i wrote two generators, one for one employer, who don't like dynamic generators, so the first was to generate mappers like mapstruct does; from model to pojos and viceversa. The second one was a static testing pojo factory generator; this last one i made public (it's pretty basic and now we have projects like instancio and podam) its name is mother-factory.

• SaaSHub

  www.saashub.com featured

  SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

  

• picocli

  31 4,889 8.4 Java

  Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.

  Picocli is a pretty good one for writing CLI apps

• record-builder

  35 733 6.7 Java

  Record builder generator for Java records

  Record builder is pretty good for making builders for your Java 17 records

• Auto

  14 10,416 9.2 Java

  A collection of source code generators for Java.

  

  I like to use AutoService to make using Java's ServiceLoader easier.

• Error Prone

  16 6,826 9.5 Java

  Catch common Java mistakes as compile-time errors

  

  error-prone is good for some extra static analysis.

• jqwik

  7 568 9.1 Java

  Property-Based Testing on the JUnit Platform

  

• JavaCPP

  8 4,479 6.3 Java

  The missing bridge between Java and native C++

  

  JavaCPP and presets for working with JNI

• javacpp-presets

  9 2,652 8.0 Java

  The missing Java distribution of native C++ libraries

  

  JavaCPP and presets for working with JNI

• afterburner.fx

  1 10 2.9 Java

  The Opinionated Un-Framework For Java FX Applications (by dlsc-software-consulting-gmbh)

  

  Afterburner.fx for FXML loading and dependency injection in JavaFX

• atlantafx

  15 811 6.6 Java

  Modern JavaFX CSS theme collection with additional controls.

  AtlantaFX & CSSFX for styling in JavaFX

• cssfx

  2 163 0.0 Java

  Allow runtime modification of JavaFX CSS (by McFoggy)

  AtlantaFX & CSSFX for styling in JavaFX

• Disruptor

  34 17,391 4.9 Java

  High Performance Inter-Thread Messaging Library

  

  Disruptor for inter-thread messaging

• jmh

  26 2,176 5.2 Java

  https://openjdk.org/projects/code-tools/jmh

  

  JMH for benchmarks

• awesome-java

  1 111 4.2

  A curated list of awesome Java libraries (by pditommaso)

• Jackson JSON Processor

  24 9,063 6.4

  Main Portal page for the Jackson project

  

  Jackson. Because JSON.

• jOOQ

  95 6,122 9.8 Java

  jOOQ is the best way to write SQL in Java

  

  JOOQ. I love this one; its very very useful when you don't need/like any ORM, and it works with, for example Spring JDBC, so you don't have to write directly the SQL into Strings. The generator helps you with all the DAO layer, and if you want it generates JPA Models too.

• Jimfs

  5 2,429 8.4 Java

  An in-memory file system for Java 7+

  

  Recently been using JIMFS. Made my tests much faster and cleaner!

• instancio

  7 894 9.7 Java

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

  

  Instancio for generating test data AssertJ Awaitility Quarkus FluentJdbc: a thin wrapper around jdbc, you can use it as an alternative for JPA and I use it in Quarkus

• Agrona

  5 2,846 9.5 Java

  High Performance data structures and utility methods for Java

  

  Aeron for low latency apps and Agrona is you're using Aeron for data structures

• methanol

  3 236 9.0 Java

  ⚗️ Lightweight HTTP extensions for Java

  Methanol - Lightweight HTTP extensions for Java: https://github.com/mizosoft/methanol

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