JDK,JRE and JVM

JVM

JVM is the Java Virtual Machine which provide some runtime environment for

the java byte code can be executed.It is an abstract machine and a not a physical one.

JVM is platform dependant because configuration of each os is different with each other.

JVM performs the following main tasks

• load code

• verify code

• Execute code

• provide run time environment

JRE

JRE is the acronym for Java Runtime Environment.It is set of software tools which used to

develop java applications.It create run time environment and it is the implementation

of JVM .JRE is physically exists in the device with the libraries + other files which the

JVM use at the runtime.

JRE

JDK

JDK is acronym for the Java Development Kit.It is physically exists and it contains JRE+ development tools.JDK provide software development environment which is used to develop java applications and applets.JDK is implemetation of any of below given java platforms.

1.Standard edition java platform

2.Enterprise edition java platform

3.Micro edition java platform

JDK