I\'m interested in writing a visualization program for the road data in the 2009 Tiger/Line Shapefiles. I\'d like to draw the line data to display all the roads for my coun
You can directly use GUI GIS tools so that their is no need of changing the source code of GeoTools.
I use QGIS which does all operations(even more) than GeoTools.
Quantum GIS - An open source Geographic Information System for editing, merging and simplifying shapefile maps. See also: creating maps with multiple layers using Quantum GIS.