/*  Circle.java
 *
 *  Bruce M. Bolden
 *  February 8, 1998
 *  http://www.cs.uidaho.edu/~bruceb/
 */

import java.awt.Color;
import java.awt.Graphics;

/**  Parent class for all circular objects.   */

final public class Circle extends GObject
{
    private int  radius;
    private static final int DEFAULT_RADIUS = 10;

    public Circle() {
        setX( 0 );    //  default position (0, 0)
        setY( 0 );
        setColor( Color.black );
        this.radius = DEFAULT_RADIUS;
    }

    public Circle(int x, int y, Color c) {
        this( x, y, c, DEFAULT_RADIUS );
    }
   
    public Circle(int x, int y, Color c, int r) {
        setX( x );
        setY( y );
        setColor( c );
        this.radius = r;
    }
    
    /**  calculates the area of a rectangular object  */
    public double area() {
        return  Math.PI * radius * radius;
    }
    
    /**  writes the area to standard output stream  <br>
     *   Note the use of the method area()  */
    public void showArea() {
        System.out.println( "     " + area() );
    }
    
    /**  writes the color to standard output stream  <br>
     *   Note the use of toString().  */
    public void showColor() {
        System.out.println( "     " + c.toString() );
    }
    
    /**  draw the circle  */
    public void draw( Graphics g ) {
        g.setColor( getColor() );
        g.drawOval( x, y, radius, radius );
    }
}