Controlling the version of Java installed

Every so often, I encounter computers that, among other things, have very specific prerequisites. For SAP CRM and Mobile Sales, more often than not, a specific version of Java should be installed. If it isn’t, problems ensue. Now, while you’ll always have the option of finding out what version is installed through the control panel, there is a much quicker way.
 
Simply open a command line, and enter the command, and the result will be displayed promptly. The command is:
 
java -version
 
Here’s the result: