<Tr> <Th> Filename extension </Th> <Td>. properties </Td> </Tr> <P>. properties is a file extension for files mainly used in Java related technologies to store the configurable parameters of an application . They can also be used for storing strings for Internationalization and localization; these are known as Property Resource Bundles . </P> <P> Each parameter is stored as a pair of strings, one storing the name of the parameter (called the key), and the other storing the value . </P> <P> Each line in a . properties file normally stores a single property . Several formats are possible for each line, including key = value, key = value, key: value, and key value . Note that single - quotes or double - quotes are considered part of the string . Trailing space is significant and presumed to be trimmed as required by the consumer . </P>

Why do we use properties file in java