The Java Runtime Environment (JRE) is what you get when you download Java software. Java technology allows you to work and play in a secure computing environment.

The Java JDK (Java Development Kit) is a software development environment that creates Java applications.

I was going to try out Azureus bit torrent, so I went to the download page and it said that I needed java. I searched my computer for files named java and found a java runtime environment 1.4.2 ...