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The applet is setup here to read the configuration data from a text file and
the graph data from a server side process, in this case a Java Servlet running on our web server.
The configuration data is acquired from the text file barprops.txt
(click here to view)
and the graph data is acquired from the servlet SHbarDataServlet.java (click
here to view).
The SHbarDataServlet ( click
here to view code ) is a simple servlet designed to demonstrate how a servlet can be used to return data to either the graphing
applet or servlet. As you will see the main routine ( doGet() ) uses the method GraphData() to construct the return data. Although
in this example the GraphData() routine simply builds the return data from 'hard coded' values, in practice this routine would
be expanded to first gather data from any number of data sources. eg. databases, files other server processes.
For a full explanation of and range of values for the above parameters please
see the Documentation - Configuration Options».
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