The term "Java 2" (J2RE) specifically refers to versions of the platform ranging from . While the branding changed later to Java SE , many legacy systems and installers still use the "Java 2" designation. Requirements & Installation

An interpreter that executes the Java code.

The , often now simply called the Java Runtime Environment (JRE) , is a essential software layer that allows Java applications to run on a computer without the need for development tools like compilers. Core Components