To be done using java and netbeans. Only need the working code. Two double data

Question

To be done using java and netbeans. Only need the working code.

Two double data fields named x and y that specify the center of the circle with getter methods. A data field radius with a getter method. A no-arg constructor that creates a default circle with (0, 0) for (x, y) and 1 for radius. A constructor that creates a circle with the specified x, y, and radius. A method getArea() that returns the area of the circle. A method getPerimeter () that returns the perimeter of the circle. A method contains (double x, double y) that returns true if the specified point (x, y) is inside this circle (see Figure 10.21a). A method contains(Circle2D circle) that returns true if the specified circle is inside this circle (see Figure 10.21b). A method overlaps (Circle2D circle) that returns true if the specified circle overlaps with this circle (see Figure 10.21c). FIGURE 10.21 (a) A point is inside the circle, (b) A circle is inside another circle, (c) A circle overlaps another circle. Draw the UML diagram for the class and then implement the class. Write a test program that creates a Circle2D object c1 (new Circle2D(2, 2, 5.5)), displays its area and perimeter, and displays the result of c1.contains(3, 3), c1.contains(new Circle2D(4, 5, 10.5)), and c1.overlaps (new Circle2D(3, 5, 2.3)).

Explanation / Answer

// Circle2D.java

public class Circle2D
{
private double x, y;
private double radius;
double getRadius()
{
return radius;
}
Circle2D()
{
x = 0;
y = 0;
radius = 1;
}
Circle2D(double a, double b, double r)
{
x = a;
y = b;
radius = r;
}
double getArea()
{
return 3.14 * radius * radius;
}
double getPerimeter()
{
return 2.0 * 3.14 * radius;
}
boolean contains(double x, double y)
{
double temp = (x - this.x) * (x - this.x) + (y - this.y) * (y - this.y);
if(temp < radius * radius) return true;
else return false;
}
boolean contains(Circle2D circle)
{
double temp = (circle.x - x) * (circle.x - x) + (circle.y - y) * (circle.y - y);
if(temp < radius * radius) return true;
else return false;
}
boolean overlaps(Circle2D circle)
{
double temp = (circle.x - x) * (circle.x - x) + (circle.y - y) * (circle.y - y);
if(temp <= radius + circle.radius && temp >= Math.abs(radius - circle.radius)) return true;
else return false;
}
}

// Circle2DTest.java

import java.util.Scanner;
public class Circle2DTest
{
public static void main(String args[])

{
double a1, b1, r1, p, q, a2, b2, r2;
Scanner in = new Scanner(System.in);
System.out.print("Enter the centre coordinates of the first circle: ");
a1 = in.nextDouble();
b1 = in.nextDouble();
System.out.print("Enter the radius of the first circle: ");
r1 = in.nextDouble();
Circle2D circle1 = new Circle2D(a1, b1, r1);
System.out.println("Area = " + circle1.getArea());
System.out.println("Perimeter = " + circle1.getPerimeter());
System.out.print(" Enter the coordinates of a point: ");
p = in.nextDouble();
q = in.nextDouble();
if(circle1.contains(p, q)) System.out.println("The point is inside the Circle");
else System.out.println("The point is outside the Circle");

System.out.print(" Enter the centre coordinates of the second circle: ");
a2 = in.nextDouble();
b2 = in.nextDouble();
System.out.print("Enter the radius of the second circle: ");
r2 = in.nextDouble();
Circle2D circle2 = new Circle2D(a2, b2, r2);
if(circle1.contains(circle2)) System.out.println("The second circle is inside the first circle");
else System.out.println("The second circle is outside the first circle");
if(circle1.overlaps(circle2)) System.out.println(" The second overlaps the first circle");
else System.out.println(" The second circle does not overlap the first circle");
}
}

/*
output:

Enter the centre coordinates of the first circle: -5 6
Enter the radius of the first circle: 8
Area = 200.96
Perimeter = 50.24

Enter the coordinates of a point: 4 5
The point is outside the Circle

Enter the centre coordinates of the second circle: 0 1
Enter the radius of the second circle: 9
The second circle is inside the first circle

The second circle does not overlap the first circle

*/

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