What is the difference between JDK,JRE & JVM ?

JDK :- JDK stands for “Java Development Kit” and which is the collection of the following : –

1. JavaCompiler

2.JVM

3.Java Library

JRE :- JRE stands for “Java Runtime environment” which is the collection of JVM and JavaLib.
JVM :- JVM stands for “Java Virtual Machine” and which is used to execute JavaByteCode.