Java, which is developed by Sun Microsystems, is a programming language. It has been popular for many years because it is a language designed to be run on any system. It is very commonly found in many online applications, such as message boards or web-based chat rooms. In fact, Java is all over the web in places you may not even realize. Because of its cross-platform appeal and versatility, the old Java slogan of ‘Write Once, Run Anywhere’ still holds true today.
Since Java has been around for many years, it is constantly being updated. Some Java applets may not even run without the more current version installed, so you should try to keep it updated. If you have a fairly recently installed version, chances are it is already trying to update itself, and you will get a little notice on your taskbar that says ‘Java update ready to be installed’. If not, you may need to manually update the software yourself.
All you have to do is go to the Java website and download the installer file for the latest version of Java. Just go to the download page and get the appropriate version for your system. I prefer to get the Windows ‘offline’ version because it is self-contained. Just watch out for the install options because it will sometimes try to also install other software such as OpenOffice or Google Toolbar with the Java update.