Accessing the platform - JavaTech: An Introduction to Scientific and Technical Computing with Java - page 641

Figure 23.1 The graphical user interface for the SerialToJavelin program after
connecting via port COM2 to the Javelin Stamp card (see Chapter 24) and making
several temperature readings.
The full code for these two classes can be found in the Web Course Chapter 23.
The essential code sections are discussed here. Note that we use the technique dis-
cussed in Chapter 6 in which SerialToJavelin implements the Outputable
interface and provides a text area to display strings from the print() and
println() methods rather than on the console. Figure 23.1 shows the user
interface after the program has received several temperature readings from the
Javelin.
When the program SerialToJavelin first begins, it builds a menu with the
names of the serial ports on the platform. It invokes the method getPorts() ,
shown below, which uses the CommPortIdentifier static method getPor-
tIdentifiers() to obtain the CommPortIdentifier object for each port
on the platform. Those that are serial port types are saved in a Hashtable .
. ..The getPorts() method in the class SerialToJavelin
...
/**
* Use the CommPortIdentifier static method to obtain
*alist of ports on the platform. Pick out the
* serial ports from the list and save in a Hash
* table. Use the port names as keys.
*/