A guide to install Java Runtime Environment (JRE) can be found by clicking on here
Java editors: Jedit
To verify the Java complier, go to Run and type the command: cmd. Type java -version on the prompt window to check the version of JRE.
Macintosh:
If you use Mac 10.5 (Leopard) or 10.6 (Snow Leopard), JRE has been installed by default.
If you use Mac 10.7 (Lion), JRE has been no longer installed. To know how to install JRE, click on here
Java editors: Jedit
To verify the Java complier, open Terminal. Type java -version on the prompt window to check the version of JRE.
