jre

• Java Runtime Environment : JRE is what we need to run a Java program 
and containsset of libraries and other files that JVM uses at run time. 
JRE = JVM + Library Classes 

JRE stands for Java Runtime Environment. 
It is the implementation of JVM. The Java Runtime Environment 
is a set of software tools which are used for developing Java applications. 
It is used to provide the runtime environment. 
It is the implementation of JVM. It physically exists. 
It contains a set of libraries + other files that JVM uses at runtime.