Answer:
More Circle objects could be constructed in the applet,
and their draw()
Several Circle Objects
The suggested answer is one way to do it. (Another way will be used in a few pages.) Here is the applet, modified to draw three concentric circles:
// assume that the drawing area is 200 by 200
public class TestCircle3 extends JApplet
{
Circle circ1 = new Circle( 100, 100, 10 );
Circle circ2 = new Circle( 100, 100, 20 );
Circle circ3 = new Circle( 100, 100, 30 );
public void paint ( Graphics gr )
{
circ1.draw( gr );
circ2.draw( gr );
circ3.draw( gr );
}
}
Here is what it draws:
Embedded Java applet removed: modern browsers do not support Java applets. The surrounding source code is retained for historical study.
Notice that with the Circle object
it was much easier to draw concentric
circles than using drawOval()
Although the present definition of the Circle class is useful,
it needs more work if it is to be used as a drawing tool.
QUESTION 8:
What (in general) needs to be done to a Circle object so that
it will draw another circle in another location?
