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CAF123
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Homework Statement
Homework Statement
I need to write a class that represents a circle object and includes the following;
-Private Class variables that store the radius and centre coordinates of the object.
-Constructors to create circle objects with nothing supplied, with just a radius value supplied and with a radius and centre supplied
-Public instance methods that allow the radius and centre coordinates to be set and retrieved(via get/set methods)
-Public instance methods that return the area and circumference of the circle
-A public class method to test whether two circles overlap.
The Attempt at a Solution
Code:
Public class Point {
private double aLoc, bLoc;
private double rLoc;
public Point (double a, double b) {
aLoc = a;
bLoc = b;
}
//First question: how to define r?
//Define a public instance method to retrieve a,b,r
//for a
public double getX() {
return aLoc;
}
//similar code for b and r.
//Public instance methods to return circumference and area
public double circumference() {
return (2.0)*(Math.PI)*(rLoc);
}
public double area() {
return (Math.PI)*(Math.pow(rLoc,2));
}
//Determine if two circles overlap (intersect)
public static double separation (Point p1, Point p2) {
double xDelta = p1.getX() - p2.getX();
double yDelta = p1.getY() - p2.getY();
//sum of radii
double addradii = p1.getZ() + p2getZ();
//Compute separation
return Math.sqrt(xDelta*xDelta + yDelta*yDelta);
//do I have to determine if they overlap here, or can I, in the main program, use an if else statement?
//want to prompt user for centre and radius implies use a string
public string toString() {
return String.format (''(%g,%g,%g)'', aLoc, bLoc, rLoc);
Does the rest of the class look reasonable - anything that I may have missed out?
Many thanks
Edit: I am new to objects and methods, so apologies if what I have written does not make sense.
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