JRE and JDK

Difference between JVM, JDK, and JRE

• JVM - Java Virtual Machine is a virtual machine which runs programs which are compiled to bytecodes. The JVM is detailed by a specification that formally describes what is required in a JVM implementation. Having a specification ensures interoperability of Java programs across different implementations so that program authors using the Java Development Kit (JDK) need not worry about traits of the underlying hardware platform.
• JDK- JDK is a wrapper around the JRE and additionally contains the compiler, interpreter, debugger and other tools. It provides users with features to run as well as develop Java programs.
• JRE- JRE is made up of class libraries, JVM and supporting files