Algorithm Workbench Starting Out with Java Early Objects Fifth Edition

1. Consider the following class declaration:

public class Circle

{

private double radius;

private void getArea()

{

return Math.PI * radius * radius;

}

private double getRadius()

{

return radius;

}

}

a. Write a no-arg constructor for this class. It should assign the radius field the value 0.

b. Write an overloaded constructor for this class. It should accept an argument copied into the radius member variable.

c. Write a toString method for this class. The method should return a string containing the radius and area of the circle.

d. Write an equals method for this class. The method should accept a Circle object as an argument. It should return true if the argument object contains the same data as the calling object, or false otherwise.

e. Write a greaterThan method for this class. The method should accept a Circle object as an argument. It should return true if the argument object has an area greater than the area of the calling object, or false otherwise.