What is JDK and JRE

JDK (JAVA DEVELOPMENT KIT)

• JDK is the setup of java that contains a development tools and JRE (Java Runtime Environment). There are the different versions of JDK.
• First version was JDK 1.0 launched in the November 1995 and the latest version is JDK 8 in the March 2014.
• JDK is used by the developers to develop the application in java.

JDK = TOOL + JRE

JRE (JAVA RUNTIME ENVIRONMENT)

• JRE is also the setup separated from the JDK that means JRE can also be installed and uninstalled separately.
• The software applications developed in java can never be executed without the JRE. JRE contains the libraries and JVM.

JRE = LIBRARIES + JVM

VERSION OF JDK

JDK versions