Construct a Plotter driver, and try it out.
Plotter r ;
if (argv.length != 1) {
System.err.println("Usage: PlotDriver driverclass");
return;
}
try {
Class c = Class.forName(argv[0]);
Object o = c.newInstance();
if (!(o instanceof Plotter))
throw new ClassNotFoundException("Not instanceof Plotter");
r = (Plotter)o;
} catch (ClassNotFoundException e) {
System.err.println("Sorry, "+argv[0]+" not a plotter class");
return;
} catch (Exception e) {
e.printStackTrace();
return;
}
r.penDown();
r.penColor(1);
r.moveTo(200, 200);
r.penColor(2);
r.drawBox(123, 200);
r.rmoveTo(10, 20);
r.penColor(3);
r.drawBox(123, 200);
r.penUp();
r.moveTo(300, 100);
r.penDown();
r.setFont("Helvetica", 14);
r.drawString("Hello World");
r.penColor(4);
r.drawBox(10, 10);
