Drawing Simple Shapes
There are two ways to draw basic shapes like circles, ovals, lines,
arcs, squares, rectangles, rounded rectangles, and polygons. The
first is to use specific drawing methods like
Graphics.drawOval(). This example uses these methods. The
second is to construct a shape and then use Graphics2D.draw() to
draw the shape. See the java.awt.geom package for examples that
create shapes.
// See The Quintessential Drawing Program
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D)g;
g2d.drawLine(x1, y1, x2, y2);
g2d.drawOval(x, y, w, h);
g2d.drawRect(x, y, w, h);
// A start angle of 0 represents a 3 o'clock position, 90 represents a 12 o'clock position,
// and -90 (or 270) represents a 6 o'clock position
int startAngle = 45;
int arcAngle = -60;
g2d.drawArc(x, y, w, h, startAngle, arcAngle);
g2d.drawRoundRect(x, y, w, h, arcWidth, arcHeight);
Polygon polygon = new Polygon();
polygon.addPoint(x, y);
// Add more points...
g2d.drawPolygon(polygon);
}
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