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You can supply a Graphics2D graphics context not only with an
AffineTransform instance, which alters position, but also with
a BasicStroke instance, which alters appearance. You use
strokes to make lines thick or thin and plain or dashed. You also
use strokes to determine how lines are capped and joined.
For example, to create a stroke, stroke, that draws lines 10 units
wide, capped with butt ends, and joined to other lines with mitered
corners, you write the following statement, using two class variables in
the BasicStroke package to control caps and joins:
BasicStroke stroke
= new BasicStroke(10, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_MITER);
Then, to attach the stroke to a Graphics2D graphics
context, g, you use the setStroke method:
g.setStroke(stroke);