JDK(Java Development Kit)

JRE(Java Runtime Environment)

JVM(Java Virtual Machine)

• • To develop and run the Java application, we need an environment and that required environment is JDK(Java Development Kit). So first we have to install JDK first.
• • At the client-side, just to run the application, the required environment is JRE(Java Runtime Environment). Once you will install JDK, automatically JRE will create.
• • In JRE, JVM is responsible to run the application. That means JVM providing JAVA execution engine that is JAVA interpreter named as java which executes source code.

JDK=JRE+ Development tools(like Eclipse, MyEclipse, Netbean etc.)
JRE=JVM+ libraries(JAVA Packages).