Groovy - An agile dynamic language for the Java Platform
(JavaDoc for Java classes)

Groovy...
  • is an agile and dynamic language for the Java Virtual Machine
  • builds upon the strengths of Java but has additional power features inspired by languages like Python, Ruby and Smalltalk
  • makes modern programming features available to Java developers with almost-zero learning curve
  • supports Domain-Specific Languages and other compact syntax so your code becomes easy to read and maintain
  • makes writing shell and build scripts easy with its powerful processing primitives, OO abilities and an Ant DSL
  • increases developer productivity by reducing scaffolding code when developing web, GUI, database or console applications
  • simplifies testing by supporting unit testing and mocking out-of-the-box
  • seamlessly integrates with all existing Java objects and libraries
  • compiles straight to Java bytecode so you can use it anywhere you can use Java
Packages 
Package Description
groovy.ant  
groovy.beans  
groovy.cli  
groovy.console.ui  
groovy.console.ui.text  
groovy.grape  
groovy.inspect
Classes for inspecting object properties through introspection.
groovy.inspect.swingui  
groovy.io
Classes for Groovier Input/Output.
groovy.jmx  
groovy.jmx.builder  
groovy.json  
groovy.junit5.plugin  
groovy.lang
Core Groovy language classes for implementing data structures, closures, metadata and so forth.
groovy.lang.groovydoc  
groovy.mock.interceptor  
groovy.model  
groovy.namespace  
groovy.security
Security-related classes
groovy.servlet  
groovy.sql  
groovy.swing.binding  
groovy.swing.impl  
groovy.swing.model  
groovy.swing.table  
groovy.test  
groovy.text  
groovy.text.markup  
groovy.time
Classes for easily manipulating Dates and times.
groovy.transform  
groovy.transform.builder  
groovy.transform.options  
groovy.transform.stc  
groovy.ui  
groovy.ui.text  
groovy.util
Various Groovy utilities for working with nodes, builders, logging, and other things.
groovy.util.logging  
groovy.util.slurpersupport  
groovy.xml  
groovy.xml.dom  
groovy.xml.slurpersupport  
groovy.xml.streamingmarkupsupport  
groovy.yaml  
org.apache.groovy.antlr  
org.apache.groovy.ast.builder  
org.apache.groovy.ast.tools  
org.apache.groovy.datetime.extensions  
org.apache.groovy.dateutil.extensions  
org.apache.groovy.groovydoc.tools  
org.apache.groovy.internal.metaclass  
org.apache.groovy.internal.util  
org.apache.groovy.io  
org.apache.groovy.jaxb.extensions  
org.apache.groovy.json  
org.apache.groovy.json.internal  
org.apache.groovy.lang.annotation  
org.apache.groovy.metaclass  
org.apache.groovy.nio.extensions  
org.apache.groovy.nio.runtime  
org.apache.groovy.parser.antlr4  
org.apache.groovy.parser.antlr4.internal  
org.apache.groovy.parser.antlr4.internal.atnmanager  
org.apache.groovy.parser.antlr4.util  
org.apache.groovy.plugin  
org.apache.groovy.plugin.testng  
org.apache.groovy.sql.extensions  
org.apache.groovy.swing.binding  
org.apache.groovy.swing.extensions  
org.apache.groovy.test  
org.apache.groovy.test.transform  
org.apache.groovy.util  
org.apache.groovy.util.concurrent  
org.apache.groovy.util.concurrent.concurrentlinkedhashmap
This package contains an implementation of a bounded ConcurrentMap data structure.
org.apache.groovy.xml.extensions  
org.apache.groovy.xml.tools  
org.apache.groovy.yaml.util  
org.codehaus.groovy
Groovy Language for the JVM
org.codehaus.groovy.ant  
org.codehaus.groovy.antlr
Parser related classes.
org.codehaus.groovy.antlr.java  
org.codehaus.groovy.antlr.parser  
org.codehaus.groovy.antlr.treewalker
Classes for walking the AST.
org.codehaus.groovy.ast
Groovy AST nodes for the syntax of the language
org.codehaus.groovy.ast.builder  
org.codehaus.groovy.ast.decompiled  
org.codehaus.groovy.ast.expr
AST nodes for Groovy expressions
org.codehaus.groovy.ast.stmt
AST nodes for Groovy statements
org.codehaus.groovy.ast.tools  
org.codehaus.groovy.binding  
org.codehaus.groovy.bsf  
org.codehaus.groovy.classgen
Generates Java classes for Groovy classes using ASM.
org.codehaus.groovy.classgen.asm
Helper classes for ASMClassGenerator.
org.codehaus.groovy.classgen.asm.indy  
org.codehaus.groovy.classgen.asm.indy.sc  
org.codehaus.groovy.classgen.asm.sc  
org.codehaus.groovy.classgen.asm.util  
org.codehaus.groovy.control
Compiler control classes.
org.codehaus.groovy.control.customizers  
org.codehaus.groovy.control.customizers.builder  
org.codehaus.groovy.control.io
Internal classes for Groovier Input/Output.
org.codehaus.groovy.control.messages
Error message classes.
org.codehaus.groovy.groovydoc  
org.codehaus.groovy.jsr223  
org.codehaus.groovy.macro.matcher  
org.codehaus.groovy.macro.methods  
org.codehaus.groovy.macro.runtime  
org.codehaus.groovy.macro.transform  
org.codehaus.groovy.plugin  
org.codehaus.groovy.reflection
Internal classes for assisting with reflection.
org.codehaus.groovy.reflection.android  
org.codehaus.groovy.reflection.stdclasses  
org.codehaus.groovy.reflection.v7  
org.codehaus.groovy.runtime
Runtime classes for Groovy - whether the dynamic interpreter is being used, the compiler or the bytecode generator.
org.codehaus.groovy.runtime.callsite  
org.codehaus.groovy.runtime.dgmimpl  
org.codehaus.groovy.runtime.dgmimpl.arrays  
org.codehaus.groovy.runtime.m12n  
org.codehaus.groovy.runtime.memoize  
org.codehaus.groovy.runtime.metaclass
Internal classes related to Groovy's metaclass implementation.
org.codehaus.groovy.runtime.powerassert  
org.codehaus.groovy.runtime.typehandling
Classes used to execute special actions based on the type.
org.codehaus.groovy.runtime.wrappers
Groovy wrapper classes for primitive types.
org.codehaus.groovy.syntax
Lexer, parser and trees.
org.codehaus.groovy.testng  
org.codehaus.groovy.tools
Compiler entry points and miscellaneous development tools.
org.codehaus.groovy.tools.groovydoc  
org.codehaus.groovy.tools.groovydoc.antlr4  
org.codehaus.groovy.tools.groovydoc.gstringTemplates  
org.codehaus.groovy.tools.gse  
org.codehaus.groovy.tools.javac
Classes related to the joint compiler.
org.codehaus.groovy.tools.shell  
org.codehaus.groovy.tools.shell.util  
org.codehaus.groovy.tools.xml
XML utilities such as for converting XML into Groovy scripts.
org.codehaus.groovy.transform  
org.codehaus.groovy.transform.sc  
org.codehaus.groovy.transform.sc.transformers  
org.codehaus.groovy.transform.stc  
org.codehaus.groovy.transform.trait  
org.codehaus.groovy.util  
org.codehaus.groovy.vmplugin
JVM version specific classes.
org.codehaus.groovy.vmplugin.v5
Java 5 specific classes.
org.codehaus.groovy.vmplugin.v6  
org.codehaus.groovy.vmplugin.v7  
org.codehaus.groovy.vmplugin.v8  
org.codehaus.groovy.vmplugin.v9