How to use Java’s var keyword Packaged as part of the 2018 version 10 release, the Java var reserved word introduced type inference to the strongly typed Java programming language.

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

What's the difference between double vs float data types? In this quick tutorial we show how float and double Java types differ, along with guidance on how to choose one over the other.