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.

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Groovy

Scala

Java 12

Java 14

Java 16

Java 17

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SPA-play

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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

What follows is a brief history of features added to Grails and starting with 2.0.



# Grails 2.0
There have been a lot of great changes in Grails 2.0:
Grails docs are better.
* Better error page - Shows code that caused the problem.
* H2 database console in development mode (at the URI /`dbconsole`)
* Grails 2.0 supports Groovy 1.8.
* Runtime reloading for typed services, domain classes, `src/groovy` and `src/java`.
* Run any command with `-reloading` to dynamically reload it.
* Binary plugins (jars)
* Better scaffolding - HTML 5 compliant (mobile/tablet ready).
* PageRenderer and LinkGenerator API for services.
* Servlet 3.0 async API supported with events plugin and platform core.
* Resources plugin integrated into core.
* Plugins for gzip, cache, and bundling (install-plugin cached-resources, zipped-resources).
* New tags: `img`, `external`, `javascript`.
* The jQuery plugin is now the default JavaScript library installed into a Grails application.
* A new date method has been added to the params object to allow easy, null-safe parsing of
dates: `def val = params.date('myDate', 'dd-MM-yyyy')`.

Various GORM improvements:

* Support for `DetachedCriteria` and new `findOrCreate` and `findOrSave` Methods.
* GORM now supports: [MongoDB](http://www.mongodb.org/), [riak](http://wiki.basho.com/), [Cassandra](https://cassandra.apache.org/_/index.html), [neo4j](https://neo4j.com/), [redis](https://redis.io/), and [Amazon SimpleDB](https://aws.amazon.com/simpledb/).
* New compile-time checked query DSL (where with a closure): `avg`, `sum`, `subqueries`, `.size()`, etc.
* Multiple scoped data sources
* Added database-migration plugin for updating production Databases.

# Grails 2.1




A History Lesson

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

A History Lesson

Grails 2.0