PROPERTIES - Java Properties File is a good extension that is used for property files only. It also contains a collection of different pairs for key value. You will be able to load everything right off of the JWM. With this extension, you can also store and save different programs as well as their settings. The properties can also be accessed by the program itself. They will then be added to your hard drive, but you can access them anytime you wish. You will have to make sure you use the java.util format to access these stored files.