Programming Tutorials

Sample program to draw a arc in J2ME

By: Tamil Selvan Printer Friendly Format    

The Graphics class also supports the drawing of arcs. To draw an arc, you must specify six parameters. These parameters are the four quantities that define the arc's bounding rectangle, its start angle, and its end angle. The bounding rectangle is defined by the same four parameters required for rectangles.

The drawing routine traces the arc along a path from the start angle to the end angle in a counterclockwise direction. Angle 0 degrees is along the positive x-axis of the coordinate plane. Like other geometric figures, arcs can be drawn in outline mode or fill mode. Arcs can be drawn in outline or in filled form, like rectangles.

import javax.microedition.lcdui.*;
/**
Demonstrates the drawing of arcs using the Graphics
class.
@see javax.microedition.lcdui.Graphics
*/
public class ArcDemo extends Canvas implements CommandListener
{
...
public void paint(Graphics g)
{
paintClipRect(g);
int width = getWidth();
int height = getHeight();
g.drawArc(5, 5, 80, 40, 90, 300);
g.fillArc(5, 60, 80, 40, 0, 250);
}
...
}

Notice that the second arc is filled and that it was created using the fillArc() method instead of the drawArc() method.