Editable code:

Circle.java

import java.awt.*;
import java.util.Objects;


public class Circle {


private static final double DEFAULT_RADIUS = 1.0; // unit circle


private static final Point DEFAULT_CENTER = new Point(0, 0); // origin


private static final Color DEFAULT_COLOR = Color.BLACK;


private double myRadius;


private Point myCenter; // Note that java.awt.Point is mutable


private Color myColor;


public Circle(final double theRadius,
final Point theCenter,
final Color theColor) {
if (theRadius <= 0) {
throw new IllegalArgumentException("The radius must be a positive value!");
}
myRadius = theRadius;


myCenter = (Point) Objects.requireNonNull(theCenter).clone();



myColor = Objects.requireNonNull(theColor);
}


public Circle() {
this(DEFAULT_RADIUS, DEFAULT_CENTER, DEFAULT_COLOR);
}


public final void setRadius(final double theRadius) {
if (theRadius <= 0) {
throw new IllegalArgumentException();
}
myRadius = theRadius;
}


public final void setCenter(final Point thePoint) {



myCenter = (Point) Objects.requireNonNull(thePoint).clone();
}


public final void setColor(final Color theColor) {
myColor = Objects.requireNonNull(theColor);
}


public final double getRadius() {
return myRadius;
}


public final Point getCenter() {


return (Point) myCenter.clone();
}


public final Color getColor() {
return myColor;
}


public double calculateDiameter() {
return 2 * myRadius;
}


public double calculateCircumference() {
return Math.PI * calculateDiameter();
}


public double calculateArea() {
return 2 * myRadius * Math.PI;
}



@Override
public String toString() {
final StringBuilder builder = new StringBuilder(128); // default initial size = 16
builder.append(getClass().getSimpleName()); // the class name without the package name
builder.append(" [radius=");
builder.append(String.format("%.2f", myRadius));
builder.append(", center=");
builder.append(myCenter);
builder.append(", color=");
builder.append(myColor);
builder.append(']');
return builder.toString();
}
}
Junittesting.java

import java.awt.Color;

import java.awt.Point;

import java.util.Scanner;

public class Junittesting {



    public static void main(String[] args) {



      Scanner sc=new Scanner(System.in);

      final double radiues = 3.0;

        final Point center = new Point(10, 10); // origin

        final Color color = Color.BLUE;



        double myRadius;

        Circle c=new Circle(radiues,center,color) ;

        System.out.println("Default Circle");

          System.out.println(c.toString());

        System.out.println("Enter the radius");

        myRadius=sc.nextDouble();



        c.setRadius(myRadius);



        System.out.println("Enter the Point");

        int x=sc.nextInt();

        int y=sc.nextInt();

        Point newPoint=new Point(x,y);

        c.setCenter(newPoint);





        System.out.println(c.toString());

        System.out.println("Diameter of the circle"+c.calculateDiameter());



        System.out.println("Circumference of the circle"+ c.calculateCircumference());



        System.out.println("Area of the circle"+ c.calculateArea());





    }



}