Next of Java 2022

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The Next of Java

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All about Java

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Learning

Java Programming 2022

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Basic of Java
Develop Backend
Application

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Programming

skills
Problem solving Data structure Algorithm

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General skills for programming
Problem solving
Data structure and algorithms
Version Control Management

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Java Developer Roadmap
https://roadmap.sh/java

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Programming Language
https://www.tiobe.com/tiobe-index/

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Java

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Java

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All about Java programming
JDK (Java Development Kit)
Tools
Frameworks
Testing
Working with Database and Network

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JDK

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JDK 17 on 14 September 2021
Free to use in production
https://www.oracle.com/downloads/licenses/no-fee-license.html

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History of JDK (8 to 17)
https://inside.java/2021/09/14/the-arrival-of-java17/

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# of JEPs
https://inside.java/2021/09/14/the-arrival-of-java17/

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Issues fixed per org

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8 vs 11 vs 17 ?

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Features of Java?
from 8 to 17 ?

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Features of Java 8 ?

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Java 8 features
Lambda expression
Stream API
Optional class
Interface default and Static methods
Functional interface

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New features .. to 17
Name Preview Stable
Pattern matching for switch 17
Sealed class 15 17
Local enum 15 16
Local interface 15 16
Record type 14 16
Pattern matching for instance 14 16
Text blocks 13 15
Switch expression 12 14
Type inference (var) 10

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Demo

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Pattern matching in switch

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Pattern matching in switch

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Sealed classes

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Record classes

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Text blocks

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Command line tools

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REPL of Java ?

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jShell
Run Java commands interactively

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Microbenchmark for Java
JMH (Java Microbenchmark Harness)
https://openjdk.java.net/projects/code-tools/jmh/

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More tools !!

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Migration Guide

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https://docs.oracle.com/en/java/javase/17/migrate/getting-started.html

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JVM languages ?

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JVM languages

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https://jaxenter.com/pirates-of-the-jvm-the-infographic-132524.html

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Tools
IDE (Eclipse, IntelliJ IDEA)
Build tools (Apache maven, Gradle)
Container (Docker, Kubernetes)

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IDEs

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Build tools
Manage libraries/dependencies
Project structure
Manage configuration
Define build and deploy process

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Build tools

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Java Web Framework

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Java Web Framework
Spring framework
Spring boot
Spring data
JPA (Java Persistence API)

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GraalVM
https://www.graalvm.org/

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Architecture

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Java
Standalone
application
Kotlin
Scala
Clojure

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Spring Native
https://github.com/spring-projects-experimental/spring-native

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Reactive programming

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Reactive programming

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https://projectreactor.io/

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Popular frameworks ?

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Java with Cloud Native

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Design for Cloud-native

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Startup time

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Memory footprint

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Performance !!
https://helidon.io/#microprofile

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Break and Quiz

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Testing with Java

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Functional Non-Functional

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https://www.javatpoint.com/functional-testing

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Testing
Unit testing
Integration testing
Component testing
Contract testing
End-to-End testing

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Types of Testing

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Testing libraries for Java

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Summary

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Java Developer Roadmap
https://roadmap.sh/java

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Q/A

Next of Java 2022

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