Question: I am unable to get my code to compile and am receiving any compile errors. Where is my mistake? public class Circle extends GeometricObject implements
I am unable to get my code to compile and am receiving any compile errors. Where is my mistake?
public class Circle extends GeometricObject implements Comparable
public double radius;
public Circle()
{
}
public Circle(double radius)
{
this.radius = radius;
}
public Circle(double radius, String color, boolean filled)
{
this.radius = radius;
setColor(color);
setFilled(filled);
}
public double getRadius()
{
return radius;
}
public void setRadius(double radius)
{
this.radius = radius;
}
@Override
public double getArea()
{
return(radius * radius) * Math.PI;
}
public double getDiameter()
{
return 2 * radius;
}
@Override
public double getPerimeter()
{
return 2 * radius * Math.PI;
}
@Override
public boolean equals(Object o)
{
return this.compareTo((Circle) o) == 0;
}
@Override
public int compareTo(Circle o)
{
if(this.radius > o.radius)
{
return 1;
}
else if(this.radius
{
return -1;
}
else
{
return 0;
}
}
@Override
public String toString()
{
return super.toString() + " Date created: " + getDateCreated() + " Radius: " + radius;
}
}
public class ComparableCircle {
public static void main(String[] args)
{
Circle circle1 = new Circle(5, "purple", true);
Circle circle2 = new Circle(5, "green", true);
Circle circle3 = new Circle(6, "blue", true);
System.out.println("Circle 1 radius: " + circle1.getRadius());
System.out.println("Circle 2 radius: " + circle2.getRadius());
System.out.println("Circle 3 radius: " + circle3.getRadius());
System.out.println("Circle 1 is " + (circle1.equals(circle2) ? "" : "not ") + "equal to Circle 2");
System.out.println("Circle 1 is " + (circle1.equals(circle3) ? "" : "not ") + "equal to Circle 3");
}
}
public abstract class GeometricObject {
private String color = "white";
private boolean filled;
private java.util.Date dateCreated;
//Construct a default GeometricObject
protected GeometricObject()
{
dateCreated = new java.util.Date();
}
protected GeometricObject(String color, boolean filled)
{
dateCreated = new java.util.Date();
this.color = color;
this.filled = filled;
}
//Return color
public String getColor()
{
return color;
}
//Setting a new color
public void setColor(String color)
{
this.color = color;
}
//Return filled
public boolean isFilled()
{
return filled;
}
//Setting a new filled
public void setFilled(boolean filled)
{
this.filled = filled;
}
//Getting dateCreated
public java.util.Date getDateCreated()
{
return dateCreated;
}
@Override
public String toString()
{
return "created on " + dateCreated + " color: " + color + " and filled: " + filled;
}
public abstract double getArea();
public abstract double getPerimeter();
}
13.9 (Enable Circle comparable) Rewrite the Circle class in Listing 13.2 to extend Geometricobject and implement the Comparable interface. Override the equals method in the Object class. Two Circle objects are equal if their radii are the same. Draw the UML diagram that involves Circle,Geometricobject, and Comparable
Step by Step Solution
There are 3 Steps involved in it
Get step-by-step solutions from verified subject matter experts
Study Help