CircleClient.java


public class CircleClient {

   public static void main(String[] args) {

       Point p1 = new Point(10,5);
       Circle c1 = new Circle(p1,7);

       System.out.println(c1);

       System.out.println("Area: " + c1.getArea());
       System.out.println("Circumference: " + c1.getCircumference());

       Point p2 = new Point(5,7);

       if(c1.contains(p2 ))
           System.out.println("(" + p2 + ") lies within the circle");
       else
           System.out.println("(" + p2 + ") does not lie within the circle");



   }

}
Circle.java


public class Circle {

   private int radius;
   public Point center;


   public Circle(Point center, int radius) {

       this.radius = radius;
       this.center = center;

   }

   public Point getCenter() {

       return center;

   }

   public int getRadius() {

       return radius;

   }

   public double getArea() {

       return (Math.PI * radius * radius);

   }

   public double getCircumference() {

       return (2 * Math.PI * radius);

   }

   public String toString() {

       return "Circle[center=(" + center + "), radius=" + radius + "]";

   }

   public boolean contains(Point p) {

       if(Point.distance(center, p) <= radius)

           return true;

       else

           return false;

   }

}

Point.java


public class Point {

   private int xp;
   private int yp;

   public Point(int xp, int yp) {

       this.xp = xp;
       this.yp = yp;

   }

   public String toString() {

       return xp + "," + yp;

   }

   public static double distance(Point a, Point b) {

       return Math.sqrt((a.xp - b.xp)*(a.xp - b.xp) + (a.yp - b.yp)*(a.yp - b.yp));

   }
}