It is possible for an application to specifiy the Java version required.
If an application has left it up to the system on which it is running to determine which version to use, and you have JRE 7 and JRE 8, only JRE 8 will be used.
All models are available in 80/20 rayon/nylon loop, cut pile or molded vinyl, and selected models can be ordered in Daytona weave or Tuxedo carpet styles.
Tuxedo (salt and pepper) loop has black flecks interspersed with loops of the carpet color.
OS X users can also have multiple JRE versions available for desktop applications but only one of those versions can be used through the web browser.