Consists of a language for writing programs ("the Java(TM) programming language"); a set of APIs, class libraries, and other programs used in developing, compiling, and error-checking programs; and a virtual machine which loads and executes the class files. In addition, the Java platform is subject to a set of compatibility requirements to ensure consistent and compatible implementations. Implementations that meet the compatibility requirements may qualify for Sun's targeted compatibility brands. The Java(TM) 2 platform is the current generation of the Java platform.

The Java Virtual Machine and supporting libraries that help Java Software run on a particular computer.

The Java Virtual Machine and the Java core classes make up the Java Platform. The Java Platform provides a uniform programming interface to a 100% Pure Java program regardless of the underlying operating system.