JDK v.s. JRE

JRE

JRE: Java Runtime Environment. It includes

  • the JVM,
  • the core libraries,
  • other additional components to run applications and applets written in Java.

JDK

JDK: Java Development Kit. It includes

  • the JRE,
  • set of API classes,
  • Java compiler,
  • Webstart,
  • additional files needed to write Java applets and applications.

Comparison

  • JDK is a superset of JRE; that is, JRE is a subset of JDK.
  • JDK is for writing and running Java applets and applications; JRE is for running Java applets and applications.

What is the difference between the JRE and the JDK ?

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