This article was originally posted on my blog. You should also read my Java 11 Tutorial (including new language and API features from Java 9, 10 and 11).

Why Was the Optional Class Introduced? In Java, null values have been a common cause of errors, leading to the infamous NullPointerException. Traditionally, developers needed to write verbose code to ...

Java is one of the most in-demand programming languages in the world and one of the two official programming languages used in Android development (the other being Kotlin). Developers familiar with ...