It's been more than 4 years since Java 8 was launched on the March 2014 and many of you already thinking that Java 8 now legacy version but there are still so many Java developers out there who don't know how to code using new language features of Java 8 like lambdas, stream, and method reference. It's high time for all those programmers to learn and master Java 8 before their skill become outdated. After that, we already have a couple more Java releases i.e. Java 9, Java 10, and Java 11 in the space of just 6 months apart but Java 8 is still the most used version, particularly when it comes to coding style.