Java Development kit JDK is an abbreviation for Java Development kit. The point is the Java development kit.
The JDK includes two features
--Compiler (command javac) --java execution environment (Java Virtual Machine)
--Java SE (Standard Edition, usually this) --Java EE (for Enterprise Edition server) --Java RE (Runtime Edition execution environment only) --Java ME (Micro edition for embedding in home appliances, etc.)
Will be added in the future