Write a java class encapsulating the concept of a circle, assuming a circle has

Question

Write a java class encapsulating the concept of a circle, assuming a circle has the following attributes: a Point representing the center of the circle, and a double representing the radius of the circle. Include a constructor, the accessor methods, the mutator methods, toString and equals methods, a method to compute the area of the circle and a method to compute the perimeter of the circle. Write a client class to test all the methods in your class.

Area = 2*p *radius

Perimeter = p*radius2

Hint: Can radius be < 0?

Hint: Be sure to maintain encapsulation.

Explanation / Answer

CirclePointTest.java

import java.util.Scanner;

public class CirclePointTest {

  
   public static void main(String[] args) {
       Scanner scan = new Scanner(System.in);
       System.out.println("Enter the first circle radius: ");
       double radius = scan.nextDouble();
       Point p = new Point();
       p.setRadius(radius);
       System.out.println(p.toString());
      
       System.out.println("Enter the second circle radius: ");
       double radius2 = scan.nextDouble();
       Point p1 = new Point();
       p1.setRadius(radius2);
       System.out.println(p1.toString());
       System.out.println("First and second circles are equal: "+p1.equals(p));
      
   }

}

Point.java

public class Point {
private double radius ;
public Point(int radius){
   if(radius>= 0){
   this.radius = radius;
   }
}
public Point(){
     
}
public double getRadius() {
   return radius;
}
public void setRadius(double radius) {
   if(radius>= 0){
   this.radius = radius;
   }
}
public double getArea(){
   return 2 * Math.PI * radius;
}
public double getPerimeter(){
   return 2 * Math.PI * radius;
}
public String toString(){
   return "Radius: "+getRadius()+" Area: "+getArea()+" Perimeter: "+getPerimeter();
   }
public boolean equals(Point p){
   if(this.radius == p.radius){
       return true;
   }
   return false;
}
}

Output:

Enter the first circle radius:
4
Radius: 4.0 Area: 25.132741228718345 Perimeter: 25.132741228718345
Enter the second circle radius:
3
Radius: 3.0 Area: 18.84955592153876 Perimeter: 18.84955592153876
First and second circles are equal: false

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