Difference between JDK, JRE and JVM.

JVM

     JVM is Java Virtual Machine, it provides the runtime environment in which java bytecode can be executed. JVMs are available for many hardware and software platforms (so JVM is platform dependent).

JRE

     JRE is Java Runtime Environment. It is the implementation of JVM.

JRE doesn't have Javac compiler.

JDK

   JDK is Java Development Kit. It exists physically and contains JRE and development tools.

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