JVM, JRE, and JDK
JVM
The Java Virtual Machine is a Java Virtual Machine that hides underlying differences, implements one compilation, and runs everywhere
JRE
The Java Runtime Environment includes the JVM and the Java core class library JRE=JVM+ The Java SE standard library
JDK
Java Development Kit Java Development Kit includes JRE and Java Development tools JDK=JRE+Java Development tools
Documentation comments
The content of the comments can be parsed into a description document in the form of a web page using the JDK’s Java Doc
