Gain insights into Java 17, cloud and microservices, reactive programming, and top JVM languages. Explore hands-on projects using Scala, Groovy, and Gradle to boost your software development career.

Modern Java Second Edition by Adam L. Davis.png

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modern_java

Groovy

Scala

Java 12

Java 14

Java 16

Java 17

Java 16-copy

Play

jshell

SPA-play

Gradle-uppercase

Gradle-copyimages

Gradle-properties

Java 14-copy

Java 16-fruits

Java 16-strings

Gradle-java

This course is meant for Java programmers or aspiring programmers who want to know about the latest Java and JVM technology. Throughout this course, you will get several opportunities to get hands-on experience with various Java concepts. 

This course will help you understand the latest in Java up to version 17; cloud and microservices; build, testing, and web frameworks; reactive programming in Java; and the best JVM languages so you can advance your career in software development. 

Moreover, you will also get to work with Scala, Groovy, and Gradle. The course explains Java concepts in detail and also draws comparisons with its older versions, as well as JVM languages.

The All-in-One Guide to Java Programming

# REST in Groovy
Groovy includes some support for XML, such as the XMLSlurper.

Grails includes converters for simply converting objects to XML or JSON or vice versa.

```
import grails.converters.JSON
import grails.converters.XML

 class BookController {
       def getBooks = {
            render Book.list() as JSON
       }
       def getBooksXML = {
            render Book.list() as XML
       }
}
```
For REST services that service multiple formats, we can use the built-in `withFormat` in Grails. So
the above would become the following:

```
def getBooks = {
       withFormat {
           json { render list as JSON }
           xml { render list as XML }
       }
}
```
Then Grails would decide which format to use based on numerous inputs; the simplest being the extension of the URL, such as `.json`.

For using web-services in Grails, 
 there’s a [rest plugin](http://www.grails.org/plugin/rest) available.

# REST in Scala
There are several options for writing REST web services in Scala. Scala itself provides first-level support for XML literals so you can [write your own XML conversions](http://joeygibson.com/2009/09/24/im-liking-scalas-xml-literals/).

Lift has built-in [support for REST](http://simply.liftweb.net/index-Chapter-11.html).
Play provides built-in parsers for JSON and XML and a simple DSL for [creating JSON](http://www.playframework.com/documentation/2.1.1/ScalaJson). 

For
example:

Groovy and Scala

Introduction

Java Syntax and Conventions

Java 7

Idiomatic Java 8: Lambdas, Streams, and Dates

New Date and Time API

Java 8 Miscellaneous

Advantages of Java 9

Java 10 - 17

Java Ecosystem

Maven and JUnit

Utilizing Essential Libraries

Modern Java Concurrency

RxJava

Other JVM Languages

Groovy

Gradle

Spock

Scala

RESTful

Microservices and Clouds

Grails

Spark

Spring Boot

Play Framework

Ratpack

Final Thoughts

Appendix

Groovy and Scala

REST in Groovy