Is it possible to do draw a rectangle with a given border thickness in an easy way?
Answer
If you are drawing on a Graphics2D object, you can use the setStroke() method:
Graphics2D g2;
double thickness = 2;
Stroke oldStroke = g2.getStroke();
g2.setStroke(new BasicStroke(thickness));
g2.drawRect(x, y, width, height);
g2.setStroke(oldStroke);
If this is being done on a Swing component and you are being passed a Graphics object, you can downcast it to a Graphics2D.
Graphics2D g2 = (Graphics2D) g;