Learn about the root cause of the Maven error 'JAVA_HOME should point to a JDK not a JRE' and how to resolve it

Learn about the differences between three of the most common Java Collections: ArrayList, LinkedList, and HashMap

Learn the key concepts of the Stream.reduce() operation in Java and how to use it to process sequential and parallel streams.

A quick and practical introduction to the TreeSet in Java.

Hit the ground running with Google Cloud Storage with quick examples of how to create a bucket, write, read, and update data.

Learn about the different features OkHttp has for POST requests.

In this tutorial, we'll describe how to avoid InvalidAlgorithmParameterException when we generate the IV and use it in a cipher algorithm.

When we need to write an array of bytes to a file in Java, there are a few options. We can use either the built-in APIs or a few common libraries.

For some analyses, SonarQube needs some exclusions added to avoid false positives. We investigate a few ways to configure it.

A quick example and explanation of the indexOf API of the standard String class in Java.

A quick look at how to set the JAVA_HOME variable on Windows, Mac OS X, and Linux.

A quick and practical example of using serialVersionUID in Java.

Learn about the System.gc() method understand if there are any use cases when calling this method might be useful

A quick and very practical intro to the new Java measurement APIs.

Learn about the bitwise operators in Java and how each of them work

Learn how to find the Smallest Missing Integer in an Array.

Learn how to join an array of primitives with a separator character or string in Java.

WebSockets allow continuous communication between a client app and its server. This can be built with reactive streams in Akka and the Play Framework.

Learn the essentials of building and using modules in Java 9. Start down the path of modularizing your code today.

Learn how to retrieve a key from a Java Map given the value