JRE & JDK

JRE – Java Runtime Environment

• It is an implementation of the Java Virtual Machine which actually executes Java programs.

• Java Runtime Environment is a plug-in needed for running java programs.

• The JRE is smaller than the JDK so it needs less Disk space.

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

• It is a bundle of software that you can use to develop Java based applications.

• Java Development Kit is needed for developing java applications.

• The JDK needs more Disk space as it contains the JRE along with various development tools.

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