Which one to download: JDK or JRE? [duplicate]

Answer 1

Just in case the other answers were not clear:

1. You need the JRE to run java apps; JRE is an initialism of Java Runtime Environment.
2. You need the JDK to develop java apps; JDK is an initialism of Java Development Kit. The JDK includes a JRE.
3. The current terms for the standard and enterprise editions are Java SE (standard) and Java EE (enterprise).