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Apache Groovy is a powerful, optionally typed and dynamic language, with static-typing and static compilation capabilities, for the Java platform aimed at improving developer productivity thanks to a concise, familiar and easy to learn syntax.
- Discuss on the mailing-list
Alternative mailing list archives. The mailing lists are...
- Events and conferences
Groovy and its ecosystem are often represented at various...
- Learn
Learn. Welcome to the learning section of the Groovy...
- Support
Support. There are numerous ways to get help with Groovy:...
- Security
On such OS versions, Groovy may create temporary directories...
- Thanks
Groovy would not be the successful Open Source project it is...
- FAQ
Yes, Groovy is an Open Source programming language project,...
- Apache Groovy
A multi-faceted language for the Java platform. Apache...
- Discuss on the mailing-list
- Environment
- Basic Features
- Ast Transforms
- Properties
- Strings
- Control Structures
- Exception Handling
- Closures
- Conclusion
If we want to use Groovy in Maven projects, we need to add the following to the pom.xml: The most recent Maven plugin can be found here and the latest version of the groovy-all here.
There are many useful features in Groovy. Now, let’s look at the basic building blocks of the language and how it differs from Java. Now, let’s look at the basic building blocks of the language and how it differs from Java.
AST (Abstract Syntax Tree) transforms allows us to hook into the Groovy compilation process and customize it to meet our needs. This is done at compilation time, so there is no performance penalty when running application. We can create our AST transformations, but we can also use the built-in ones. We can create our transformations, or we can bene...
In Groovy, we can create POGOs (Plain Old Groovy Objects) that work the same way as POJOs in Java, although they’re more compact because getters and setters are automatically generated for public propertiesduring compilation. It’s important to remember that they will be generated only if they’re not already defined. This gives us the flexibility of...
There are multiple ways for expressing string literals. The approach used in Java (double-quoted strings) is supported, but it is also allowed to use single quotes when preferred. Multi-line strings, sometimes called heredocs in other languages, are also supported, using triple quotes (either single or double). Multi-line strings, sometimes called ...
9.1. Conditionals: if-else
Groovy supports the conditional if/elsesyntax as expected:
9.2. Conditionals: switch-case
The example above will print number.
9.3. Loops: while
Groovy supports the usual while loops like Java does:
The big difference is that checked exceptions handling is not enforced. To handle general exceptions, we can place the potentially exception-causing code in a try/catchblock: By not declaring the type of exception we catch, any exception will be caught here.
Simply put, a closure is an anonymous block of executable code which can be passed to variables and has access to data in the context where it was defined. They’re also similar to anonymous inner classes, although they don’t implement an interface or extend a base class. They are similar to lambdas in Java. Interestingly, Groovy can take full advan...
This article provided a quick introduction to the Groovy language and its key features. We started by introducing simple concepts such as basic syntax, conditional statements, and operators. We also demonstrated some more advanced features such as operators and closures. If you want to find more information about the language and it’s semantics, yo...
Learn the meaning, synonyms, examples, and history of the word groovy, which can mean marvelous, wonderful, excellent, or hip, trendy. Find out how to use groovy in a sentence and see related words and entries.
- Dictionarygroovy/ˈɡruːvi/
adjective
- 1. fashionable and exciting: informal, dated "a groovy new haircut"
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- Arithmetic operators. Groovy supports the usual familiar arithmetic operators you find in mathematics and in other programming languages like Java. All the Java arithmetic operators are supported.
- Relational operators. Relational operators allow comparisons between objects, to know if two objects are the same or different, or if one is greater than, less than, or equal to the other.
- Logical operators. Groovy offers three logical operators for boolean expressions: &&: logical "and" ||: logical "or" ! : logical "not" Let’s illustrate them with the following examples
- Bitwise and bit shift operators. 4.1. Bitwise operators. Groovy offers four bitwise operators: &: bitwise "and" |: bitwise "or" ^: bitwise "xor" (exclusive "or")
Unlike Java, a Groovy source code file can be executed as an (uncompiled) script, if it contains code outside any class definition, if it is a class with a main method, or if it is a Runnable or GroovyTestCase. A Groovy script is fully parsed, compiled, and generated before executing (similar to Python and Ruby).
Learn how to use Groovy, a dynamic language for the Java platform, with this comprehensive documentation. Find guides, specifications, tools, API references, and more for Groovy versions.
If you wish to embed Groovy in your application, you may just prefer to point your build to your favourite maven repository or the Groovy artifactory instance. Please see the download page for available modules for each Groovy version.
