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Java 101: Class and object initialization

Class and object initialization in Java

Learn how to to initialize Java classes and objects for successful JVM execution

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Java polymorphism and its types

Learn the four types of polymorphism in Java, then start using subtype polymorphism to execute different forms of the same Java method

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Java tip: Fields and methods in Java

Learn seven advanced techniques for working with fields and methods in Java, including recursion, method call chaining, pass-by-value arguments, and rules for calling methods

Matryoshka /Russian nesting dolls > inheritance / sequencing / hidden layers
Tip

Java tip: When to use composition vs inheritance

Inheritance is a valuable programming technique, but in some conditions it breaks encapsulation. Find out why composition is the vital alternative to inheritance, and learn when and how to use it in your Java programs.

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Inheritance in Java, Part 2: Object and its methods

Get to know Java's Object superclass and its methods for duplicating, comparing, cleaning up, and scheduling Java objects

Matryoshka /Russian nesting doll > inheritance / sequencing / hidden layers

Inheritance in Java, Part 1: The extends keyword

Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more

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Classes and objects in Java

Learn how to make classes, fields, methods, constructors, and objects work together in your Java applications.

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Loop, switch, or take a break? Deciding and iterating with Java statements

Learn how to use standby statements like for, while, if-else, and break, then get started with the new switch expressions in Java 12

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Evaluate Java expressions with operators

Everything you need to know about the Java operator types and using them to write and evaluate Java expressions in Java 12

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Elementary Java language features

Learn three ways to document your code, then get started using identifiers, types, literals, and variables in Java 12

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Learn Java from the ground up

If you're new to Java then you've come to the right place. Get an overview of the Java platform, then code your first application using Java 12 and the new Java Shell

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What is JPA? Introduction to the Java Persistence API

Get to know the Java ORM standard for storing, accessing, and managing Java objects in a relational database

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Java XML and JSON: Document processing for Java SE, Part 2: JSON-B

Use the Java API for JSON Binding (JSON-B) to serialize and deserialize Java objects, arrays, and collections in Java SE

Javaworld > JVM / JDK / JRE explainer series

JVM, JDK, JRE: What's the difference?

Three indispensable Java platform components, and how they work together in your Java applications

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Java XML and JSON: Document processing for Java SE, Part 1: SAXON and Jackson

Learn how to transform and convert XML and JSON documents with SAXON and Jackson

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Write a purely functional Bubble Sort application

Improve a classic, object-oriented sort application using Java's functional programming capabilities

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Functional programming for Java developers, Part 2

Rewrite object-oriented code using functional techniques. Get started with lambdas, method references, functional interfaces, and the Streams API in Java

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Functional programming for Java developers, Part 1

Optimize your Java code with these five functional programming techniques

Exploratory Art/Tech Residency. Building a reactive physical structure for an AV live performance.

Mastering Spring framework 5, Part 2: Spring WebFlux

Build reactive web applications using Spring WebFlux annotations and functional programming techniques

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Mastering Spring framework 5, Part 1: Spring MVC

If you like the Spring framework, you'll want to explore Spring MVC 5 for Java web development. This tutorial shows you how to fast-track Spring-based development with Spring MVC 5, Spring Boot, and Spring Initializr.

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