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.
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Mixin is a trait/mixin and bytecode weaving framework for Java using ASM
True Object-Oriented Java Web Framework without NULLs, Static Methods, Annotations, and Mutable Objects
Elegance, high performance and robustness all in one java bean mapper
A simple, lightweight and powerful field validation library for Android.
Lightweight Java library for reading and writing fixed-width / fixed-length flat files using annotations on POJOs — for banking, payroll, EDI, mainframe, and batch integrations.
This Maven plugin automatically generates package-info.java files with JSpecify annotations (@NullMarked or @NullUnmarked), helping you manage nullness boundaries in your Java projects without manual boilerplate.