How-Tos

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Tools + toolbelt in a binary environment.

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JUnit 5 tutorial, part 1: Unit testing with JUnit 5, Mockito, and Hamcrest

Set up your first Maven project and start writing robust unit tests with JUnit 5, Hamcrest, and Mockito

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Static classes and inner classes in Java

Learn how to use the four types of nested classes in your Java code

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How to store data in Java objects

A timely introduction to using instance variables in your Java classes

JavaWorld > Android Studio for Beginners [movile java package] > Part 4: Debug + Extend

Android Studio for beginners, Part 4: Debugging tools and productivity plugins

Use built-in tools and plugins to improve code quality and boost productivity in Android Studio

JavaWorld > Android Studio for Beginners [movile java package] > Part 3: Build + Test

Android Studio for beginners, Part 3: Build and run the app

Build your app with Gradle, then run it with the Android device emulator. This update includes troubleshooting advice for the Android device emulator

JavaWorld > Android Studio for Beginners [movile java package] > Part 2: Code

Android Studio for beginners, Part 2: Explore and code the app

Write your first animated Android app with Android Studio's Project editor

JavaWorld > Android Studio for Beginners [movile java package] > Part 1: Install + Setup

Android Studio for beginners, Part 1: Installation and setup

If you're new to Android Studio, start here: Part 1 walks through installing Android Studio 3.x and launching your first Android project

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Socket programming in Java: A tutorial

Three iterations of a Java socket client-server example demonstrate the timeless utility of Java I/O

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Continuous integration with Jenkins

Setup a continuous integration process to build and test a Java web app with Jenkins and JUnit

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27 essential tips for Git and GitHub users

Smarter cloning, forking, merging, branching, documenting, collaboration, and workflow automation with Git and GitHub

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Machine learning for Java developers, Part 2: Deploy your model

Learn how to build and deploy your machine learning data model in a Java-based production environment

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Machine learning for Java developers, Part 1: Algorithms for machine learning

Set up a machine learning algorithm and develop your first prediction function in Java, then get started with Weka.

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Get started with method references in Java

Why you should use method references instead of anonymous classes in your functional Java programs

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Get started with lambda expressions in Java

Learn how to use lambda expressions and functional programming techniques in your Java programs

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Exceptions in Java, Part 2: Advanced features and types

Take your Java exceptions to the next level with stack traces, exception chaining, try-with-resources, final re-throw, and more

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Exceptions in Java, Part 1: Exception handling basics

Everything you need to know about throwing, trying, catching, and cleaning up after Java exceptions

Interfaces in Java

Interfaces in Java

Learn the difference between classes and interfaces once and for all, then get started declaring, implementing, and extending interfaces in your Java programs

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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