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What is the difference between JDK and JRE?


JDK stands for Java  Development Kit.  It contains the tools and
libraries for development of Java programs.  It also contains
compilers and debuggers needed to compile Java program.


JRE stands for Java Runtime Environment. This is included in JDK.
JRE provides libraries and  JVM that is required to run a Java
program.

Its currently owned by Oracle.

http://www.oracle.com/technetwork/pt/java/javase/overview/index.html 
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