Wednesday, May 19, 2010

Difference Between JRE and JDK

JRE and JDK
JRE
(Java Runtime environment)
JDK
(Java Development Toolkit)
It is an implementation of the Java Virtual Machine* which actually executes Java programs.It is a bundle of software that you can use to develop Java based applications.
Java Run Time Environment is a plug-in needed for running java programs.Java Development Kit is needed for developing java applications.
JRE is smaller than JDK so it needs less Disk space.JDK needs more Disk space as it contains JRE along with various development tools.
JRE can be downloaded/supported freely from
java.com
JDK can be downloaded/supported freely from
java.sun.com
It includes JVM , Core libraries and other additional components to run applications and applets written in Java.It includes JRE, set of API classes, Java compiler, Webstart and additional files needed to write Java applets and applications.
Reference :

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