The Java virtual machine is a program whose purpose is to execute other programs. It’s a simple idea that also stands as one of our greatest examples of coding kung fu.

The JDK is the development platform for building Java applications. Learn about different JDK versions, then install a JDK in your development environment and use it to compile a Java program.

In this example, to easily refactor the code and fix the single responsibility principle violation, just create a new class dedicated exclusively to manage the history. This new class's single ...