Discover the power of the Micronaut Framework for building fast, lightweight, and scalable Java applications. Learn how Micronaut's innovative features streamline development and boost performance. Dive into Micronaut today for next-level Java development efficiency.

1. Micronaut Framework Guide: Framework
Basics and Fundamentals
Introduction
Micronaut is a cool tool that’s changing the way people create applications using the
JVM (Java Virtual Machine). It’s special because it helps you make apps that are light
and easy to change. Plus, it’s free for everyone to use, which has made a lot of
developers really excited about it. What’s really great about Micronaut is that it
doesn’t need much memory and starts up super fast, no matter how big your app is.
This is awesome for developers who want to make their work simpler and quicker,
especially when they’re testing how different parts of their apps work together.
These tests are easier to make and run faster, helping you get things done more
efficiently. In this blog, we’re going to explore the basic and important parts of
Micronaut, showing you how it can make building your applications a whole lot
better.

2. How does Micronaut work?
Micronaut is like a smart assistant for making web apps and services, but it does
things in a cooler way than older methods. Imagine you’re building a model airplane.
With Micronaut, you get all the pieces ready and instructions sorted out before you
start putting it together, rather than figuring it out as you go.
This is what we call “compile-time dependency injection.” It’s a fancy term for saying
Micronaut prepares everything early on. This early prep means your app doesn’t
have to do a bunch of heavy lifting when it starts, which usually takes up a lot of
computer memory and time.
That’s why apps made with Micronaut are like speedy little race cars – they start
super quick and don’t need a lot of fuel (or memory) to run. Plus, Micronaut is great
for apps in the cloud (like storing data and services online), and it’s not picky about
the programming language you use.
Whether you like Java, Kotlin, or Groovy, Micronaut works with all of them. This
easy-going nature, combined with its speedy performance, makes Micronaut a really
handy tool for building modern web apps.
Importance and popularity of Micronaut in modern Java development
• Micronaut Framework is gaining popularity for its innovative approach to setting up
Java applications.
• Unlike traditional methods, Micronaut handles most of the setup work when the
app is being built, not each time it starts.
• This results in applications starting up very quickly.
• Apps built with Micronaut Framework don’t require as much computer power to
run.
• It’s particularly useful for applications that need to be small, fast, and perform well
online or in the cloud.
• Developers find Micronaut Framework user-friendly.
• It’s compatible with Java and similar languages like Kotlin and Groovy.

3. • Micronaut is excellent for creating modern apps that need to respond quickly and
handle lots of data.
• It’s like a super tool for those looking to create efficient Java applications for
today’s internet-focused environment.
Micronaut Framework Core principles
Fast and Light-
Micronauts make apps start really fast and use less computer memory. It does a lot
of work when the app is first built, not when it starts each time. This is super helpful
for apps that need to be quick and don’t have a lot of resources, like in microservices
and serverless environments.
Setting Up Early-
Micronauts set up connections between different parts of the app (called
“dependency injection”) when the app is being built, not while it’s running. This
means the app runs smoother and faster.
Ready for Quick Actions-
It’s great for apps that need to do things without waiting (called “reactive
programming”). This is really useful for apps that deal with lots of data coming in and
out, like internet stuff or network calls.
Cloud-Friendly-
Micronaut is made for apps that live in the cloud. It has cool features for managing
settings across different services, finding services, and connecting with cloud services
easily.
Choose Your Language-
You can use Micronaut with different programming languages that work on the JVM,
like Java, Kotlin, and Groovy. This means you can pick the language you like best.
Simple and Efficient Design-

4. The framework is designed to be simple, avoiding complicated processes. This makes
apps run faster and use less memory, which is better than how some older
frameworks do things.
Key features of the Micronaut Framework
Simpler Setup Process: Micronaut handles a lot of its setup work when you’re
writing your code, not when the app is running. This makes things run smoother and
faster.
Quick to Start: Apps made with Micronaut start up really quickly. This is great when
you need to turn apps on and off a lot, like with many small online services.
Doesn’t Need Much Memory: It’s designed to use a small amount of computer
memory, which is perfect for running lots of small apps, especially on the internet.
Great for Cloud Apps: Micronaut is made for building apps that work well in the
cloud. It has special features for online services, like finding and connecting to other
services easily.
Handles Lots of Things at Once: It supports ‘reactive programming’, which means it
can do many tasks at the same time without getting slowed down.
Works with Different Coding Languages: Although it’s mainly used with Java, you
can also use it with other languages like Kotlin and Groovy, giving you more choices.
Setting Up Your Environment (Codes)
Setting up your environment for working with the Micronaut framework involves a
few key steps. Here’s a general guide, assuming you are setting up a Java-based
environment:
Prerequisites:
Java Development Kit (JDK): Ensure you have the JDK installed. Micronaut supports
JDK 8 and above.

5. Step 1: Install Micronaut CLI
Using SDKMAN! (Linux/Mac):
Install SDKMAN!: curl -s “https://get.sdkman.io” | bash
Open a new terminal and install Micronaut: sdk install micronaut
Manual Installation (Windows/Linux/Mac):
• Download the Micronaut CLI from the Micronaut website.
• Unzip the distribution to a location on your computer.
• Add the bin directory of the unzipped folder to your PATH environment variable.
Step 2: Set Up an IDE
• IntelliJ IDEA, Eclipse, or Visual Studio Code are recommended.
• For IntelliJ IDEA and Eclipse, there are specific plugins for Micronaut.
• For VS Code, ensure you have the Java extension pack installed.
Step 3: Create Your First Micronaut Project
• Open your terminal or command prompt.
• Create a new project using the Micronaut CLI:
• mn create-app hello-world -features=java
• This command creates a new Micronaut application named hello-world with Java
configuration.
Step 4: Open and Run Your Project
• Open the created project in your IDE.
• Locate the Application.java (or similar) file and run it.
• Your Micronaut service should start, typically listening on port 8080.
Step 5: Explore and Add Dependencies
• You can add dependencies to your build.gradle or pom.xml file for Maven projects.
• Explore additional features and modules provided by Micronaut for database
access, security, etc.

6. What are some alternatives to
Micronaut?
• Spring Boot
• Quarkus
• Vert.x
• Helidon
• Dropwizard
• Micron
• Ratpack
• Javalin
Conclusion
To wrap it up, the Micronaut Framework is a really strong and handy tool for making
Java apps today. It does something clever by setting up a lot of things before the app
even runs, which makes apps start faster and use less computer power. This makes
Micronaut perfect for any Java development company that wants to make apps that
are easy to handle, work fast, and are great for online and cloud services. In this
blog, we’ve gone through the basics of Micronaut and what makes it so good. We’ve
shared tips and info that help developers and companies really make the most of
what Micronaut can do. So, if you’re working at a Java development company or
you’re a developer wanting to get better at making cool Java apps, Micronaut is a
great way to go for building top-notch Java applications.
Originally published by: Micronaut Framework Guide: Framework Basics and
Fundamentals