Question

Question 11 (20 points) Given the class Point below, define a class Circle that represent a circle with a given center and radius. The circle class should have a center attribute named center as well as a floating point radius attribute. The center is a point object, defined by the class Point. The class should also have these members: the constructor of the class, which should take parameters to initialize all attributes - a getter for center a setter for radius a method liesOnCircle0 that takes a point parameter and returns true if the point lies on the - - circumference of the circle and false otherwise. public class Point private int x, y: public Point(int x, int y) this.x-x this.y-y: public String tostring ) return "x"+"y+y: public double distance (Point other) return Math.sgrt (Hath.pow(x-other.x, 21+Math.pow(y-other. у,2)); Question 12 (20 points) Write an application CircleTest that creates and populates an array of 50 cireles with center and radius data from the user. The program calculates and prints to the screen the number of circles that contain origin (0, 0) on their circumference.

Answer 1

Ans 11

public class Circle
{
public float radius; //radius of type float
Point center; //center of type Point class

public Circle(float radius,Point center) //contructor for initilizing the variables
   {
   this.radius=radius;
   this.center=center;
   }

public String getCenter() //getting the data of the center
   {
   return center;
   }

public void setRadius(float r) //setting the value of the radius
   {
   radius=r;
   }

public boolean liesOnCircle() // checking the condition by calling the distance function from point class
   {
   if(Point.distance()==radius)
       return true;
   else
       return false;
   }

}

Ans 12

public class CircleTest
{
public static void main(String[] args)
{
public int count=0;
Scanner s=new Scanner(System.in); //using scanner to take input from the user

System.out.println("Let the center be (h,k) . Enter the "h" of the center ");

int arrCenterH[]=new int[50]; //taking 50 inputs for the first point of the center of the circle

for(int i=0;i<50;i++)
       {
arrCenterH[i]=s.nextInt();
       }
System.out.println("Let the center be (h,k) . Enter the "k" of the center ");

int arrCenterK[]=new int[50]; //taking 50 inputs for the first point of the center of the circle

for(int i=0;i<50;i++)
       {
arrCenterK[i]=s.nextInt();
       }

System.out.println("enter the data of the radius "); //storing the data of the address in yet another array

int arrRadius[]=new int[50];

for(int i=0;i<50;i++)
       {
arrRadius[i]=s.nextInt();
       }

public void ConditionCheck(int[] arrCenterH,int[] arrCenterK,Point p) //If the center lies on the circumfere,the count increases
   {
   for(int j=0;j<50;j++)
       {
       if(Math.pow(p.x-arrCenterH[j],2)+Math.pow(p.y=arrCenterK[j],2) == Math.pow(arrCenterH[j],2) + Math.pow(arrCenterK[j],2))
           {
           count++;
           }
       System.out.println(count); //Prints the number of circles passing through the center
}
}
}