When localizing an application, you'll probably have a dauntingly large number of message strings, button labels, and so on, that all need to be translated. To make this task feasible, you'll want to define the message strings in an external location, usually called a resource. The person carrying out the translation can then simply edit the resource files without having to touch the source code of the program.
In Java, you use property files to specify string resources, and you implement classes for resources of other types.
Java technology resources are not the same as Windows or Macintosh resources. A Macintosh or Windows ...