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What is Groovy?

By Priya PedamkarPriya Pedamkar

What-is-Groovy

Introduction to Groovy

Groovy is an object-oriented programming language managed by Apache Software Foundation. It is a java environment compatible and used as a scripting language. It supports functional programming, Metaprogramming and efficient processing of XML and JSON data that are implemented through JVM. Groovy is syntactically similar with Java syntax. Groovy code can be integrated with existing Java code for better usability. This Language is popular in the Java community as it is a good fit for both static and dynamic programming. In most of the use cases, Groovy is considered as an alternative to Java programming. Groovy is lightweight and user friendly for developers.

Understanding Groovy

  • Object-oriented language.
  • Has both static and dynamic capabilities.
  • Offers advanced programming concepts.
  • Considered an alternative Java language.

Examples of Alternative Java Languages

  • Scala: Which is a statically-typed, object-oriented and functional language,
  • Clojure: This is a dialect of the Lisp language that was created expressly to run on the JVM.
  • Kotlin: This is a statically-typed language that runs on the JVM that can compile into either JavaScript or JVM bytecode.

Groovy Java Languages

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Polyglot programming is a concept that’s arisen in recent years to really take advantage of this explosion in alternative languages for different frameworks. The concept is simple. We might consider more stable, predictable languages at the bottom of the box, or in our case, the framework. For the JVM world, this might include static languages such as Java or Scala. As we move up the box or into the actual application code, we might think of more dynamic and flexible languages. For our case, that may be Groovy, Clojure, or even JRuby. At the top of the box, we might look to lightweight DSL (Domain Specific Language)s to build the key business logic into our application on the JVM include the Apache Camel DSL or Gradle, the build tool, but we could also build our own business-specific DSLs to really capture the rules of our business domain.

Installation Process of Groovy

Step 1. First installing the SDKMAN tool. Which is supported on Linux or OS X. However, if you are working on a Windows machine. You can still follow along by first installing the Cygwin UNIX emulator. Which can be found at www.Cygwin.com

Step 2. Open the terminal and type the below command, and hit enter

Groovy Installation 1

Step 3. Once the execution script complete, we will source the SDKMAN init script to ensure that everything SDKMAN needs to operate has been initialized in our current session.

Groovy Installation 2

Step 4. Finally, we will validate that SDKMAN installed successfully by asking SDKMAN for its current version to type the command sdk version and hit enter.

Installation 3

Step 4. Once you have installed SDKMAN successfully, you can then proceed to install Groovy. You can do this with the SDKMAN install command.

Installation 4
Installation 5

It actually depends on the JVM, which means that you will also need to ensure that you have Java installed and available in order for Groovy to work properly.

Why is Groovy Used?

It is a very similar syntax to Java; Groovy is easily accessible for Java developers. As a matter of fact, most Java syntax is actually legal Groovy syntax, as it simply takes the existing Java concepts and builds upon them. This gives Groovy a very smooth learning curve to a developer who may already be familiar with the Java Language. One of the biggest concerns when a team considers branching out into a new language is that they will lose the investment in the massive proprietary code that they have built up over the years.

However, given Groovy’s tight integration with the JVM, you can easily use your existing Java libraries from Groovy.

Finally, Groovy objects actually extend the same java.lang.Object base object, so it fits very well into the Java object-oriented module that your team may already know. Overall, Groovy will feel very familiar to a Java team, especially when compared to other alternative languages such as Scala or Clojure.

Why do We Need Groovy?

Groovy works very well in the application development layer, especially web development. Groovy-based frameworks such as Grails are excellent alternatives to Java-based web frameworks such as Stripes or Spring MVC, as Groovy’s dynamic nature makes it very well suited to working with concepts on the web.

It is well suited to building DSLs on top of Java or Groovy frameworks. Though you can also build these DSLs in Java, as we have seen with Apache Camel, Groovy’s expressive nature and flexible syntax allow you to create much more readable DSLs than were ever possible in the Java language.

Groovy’s flexible syntax allows you to create tests that are very readable and that could be easily shared with a business stakeholder to ensure your app is delivering the expected functionality.

The popular Groovy-based testing framework Spock is a great example of Groovy’s syntax to create these highly readable tests.

It is lightweight, script-like syntax, and tight integration with Java APIs makes it an excellent choice for writing small scripts in a JVM environment.

Advantages and Disadvantages of Groovy

Let’s explore some of the well-known advantages and disadvantages of Groovy.

Advantages

  • Dynamic typing (enables you to program faster, at least primarily).
  • Currying/partial software (enabling you to a replica of the function with more than one arguments set).
  • Tooling support to get useful APIs applying @DelegatesTo.
  • Native associative array/key-value mapping support (you are able to generate an associative array literal).
  • String interpolation (better building among strings showing values).
  • Regex’s getting first-class residents.

Disadvantages

  • The Groovy plugins (program conclusion, syntax coloring) – around for Eclipse – remains incredibly buggy.
  • No base code format for Groovy: This can be an actual drawback for Groovy currently. In case you are doing work in a group, this might be a headache: reading the program based on a format, CVS evaluate can be hard, a few examples to say.
  • You should learn new ideas prefer: closures – which will benefit you once you understand them! Without closures, you are unable to apply inner classes in Groovy that are mainly essentially written unit testing.

How will this Technology Help you Grow your Career?

Groovy Framework is widely used in most multinational corporations like Netflix, Samsung through Smart Things, Mutual of Omaha, Target and much more.

Groovy has its own good special places when it comes to utilization; for example, we come across plenty of projects as well as products embedding Groovy to get conveying their organization protocols or simply business logic in an exceedingly understandable style, a lot that also subject matter specialists have the ability to author protocols themselves without much support from programmers.

Conclusion

It seems like good memories with leave only footprints when you’ve been coding in Java or additional OOP languages for a long time.

It creates things much simpler and way less verbose. More features prefer scripting and simply Domain Specific Language features, push Groovy to the new level, and provide it with the new look which is lacking for older languages.

Recommended Articles

This has been a guide to What is Groovy?. Here we discussed the Concept, Needs, Understanding, Advantages, Disadvantages and Installation process of Groovy. You can also go through our other suggested articles to learn more-

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