Is Derby/Java DB included in Java 6?

Question

I've read in a couple of places that Derby/Java DB is included in Java SE 6, e.g. http://java.sun.com/developer/technicalArticles/J2SE/Desktop/javase6/beta2.html but I can't find anyone who has used it without installing it, including it on the classpath, etc.
What's going on? If it's included, why does everyone install another copy?

Answer 1

You need the JDK, not the JRE.