circle.java~6~

来自「《Java十大经典案例》源代码」· JAVA~6~ 代码 · 共 27 行

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class Circle extends Point {
  protected double radius;
  public Circle() {
    super(0,0);
    setRadius(0);
  }

  public Circle(double r,double a,double b) {
    super(a,b);
    setRadius(r);
  }

  public void setRadius( double r){
    radius = (r>=0.0?r:0.0);
  }

}