Difference Between Spring boot and Quarkus

Spring Boot and Quarkus are two popular frameworks in the Java ecosystem that simplify application development. While they share some similarities, they fulfill to different needs and preferences in the software development landscape. This article explores the key differences between Spring Boot and Quarkus. So let's understand Spring Boot vs Quarkus.

Spring Boot

Spring Boot is an extension of the Spring Framework designed to simplify the setup and development of new Spring applications. It provides a range of features, including production-ready connectors, which enhance developer productivity and streamline the development process. Spring Boot eliminates the need for extensive XML configuration and focuses on minimizing the time required for development, unit testing, and integration testing. It is commonly utilized for developing microservices and enterprise-level applications.

Example of Spring Boot:

Java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication // Marks this class as a Spring Boot application
public class SpringBootHelloWorld {
    
    public static void main(String[] args) { // Main method - entry point of the application
        SpringApplication.run(SpringBootHelloWorld.class, args); // Launches the application
    }

    @RestController // Indicates that this class will handle web requests
    static class HelloWorldController {
        
        @GetMapping("/hello") // Maps GET requests to /hello endpoint
        public String hello() { // Method to handle the request
            return "Hello from Spring Boot!"; // Returns greeting message
        }
    }
}

Explanation:

@SpringBootApplication: Indicates the main class for Spring Boot application setup.
main method: Entry point of the application; starts the Spring context.
@RestController: Marks the class as a controller that handles web requests.
@GetMapping("/hello"): Specifies the URL endpoint for GET requests.
hello() method: Returns a simple greeting message when the /hello endpoint is accessed.

Quarkus

Quarkus is a Java framework optimized for Kubernetes, designed specifically for GraalVM and HotSpot. It aims to optimize Java for Kubernetes environments, emphasizing low memory usage and fast startup times. Quarkus provides a unified development model that supports both imperative and reactive programming styles. It allows developers to leverage existing Java libraries while enhancing performance in cloud-native architectures.

Example of Quarkus:

Java

import io.quarkus.runtime.Quarkus;
import io.quarkus.runtime.annotations.QuarkusMain;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@QuarkusMain // Marks this class as the main entry point for Quarkus application
public class QuarkusHelloWorld {
    
    public static void main(String[] args) { // Main method - entry point of the application
        Quarkus.run(args); // Launches the Quarkus application
    }

    @Path("/hello") // Specifies the URL path for this resource
    public static class HelloWorldResource {
        
        @GET // Indicates this method will respond to GET requests
        @Produces(MediaType.TEXT_PLAIN) // Specifies the response media type as plain text
        public String hello() { // Method to handle the request
            return "Hello from Quarkus!"; // Returns greeting message
        }
    }
}

Explanation:

@QuarkusMain: Indicates the main class for the Quarkus application setup.
main method: Entry point of the application; starts the Quarkus context.
@Path("/hello"): Defines the URL endpoint for this resource class.
@GET: Maps this method to respond to GET HTTP requests.
@Produces(MediaType.TEXT_PLAIN): Specifies that the method returns plain text.
hello() method: Returns a simple greeting message when the /hello endpoint is accessed.