
4.9. Requirements for a GPSunit 45
For example, an application of our component might be attaching a GPS
smartphone to any object in the real world and retrieving its location by
calling it.
Before a programmer starts to code a component from scratch, it’s gen-
erally a good idea to look for existing software and explore how it works
and how it might be modified. At SourceForge, there is a pretty good
match, written by Ulrich Walther, for the component we want to use as a
basis for our code:
sourceforge.net/projects/javagps or javagps.sourceforge.net
JavaGPS (V1.02) is a Java-only base library that enables ac-
cess to GPS devices from within any Java