Drawing in a Window - Beginning Java - page 987

// Define open arc as an upper segment of an ellipse
Arc2D.Double top = new Arc2D.Double(position.x, position.y,
width, height,
start, extent,
Arc2D.OPEN);

// Define open arc as lower segment of ellipse shifted up
relative to 1st
Arc2D.Double bottom = new Arc2D.Double(
position.x, position.y - height +

diameter,

width, height,
start + 180, extent,
Arc2D.OPEN);

// Create a circle centered between the two arcs
Ellipse2D.Double circle1 = new Ellipse2D.Double(
position.x + width/2 - diameter/

2,position.y,

diameter, diameter);

// Create a second circle concentric with the first and half the
diameter
Ellipse2D.Double circle2 = new Ellipse2D.Double(
position.x + width/2 - diameter/4, position.y +

diameter/4,

diameter/2, diameter/2);

// Draw all the shapes
g2D.setPaint(Color.BLACK); // Draw in black

g2D.draw(top);
g2D.draw(bottom);

g2D.setPaint(Color.BLUE); // Draw in blue

g2D.draw(circle1);
g2D.draw(circle2);
g2D.drawString("Arcs and ellipses", 80, 100); // Draw some text

}

Directory "Sketcher 3 drawing arcs and ellipses"

Running Sketcher with this version of the paint() method in SketcherView produces the window
shown in Figure 19-11 .

FIGURE 19-11