Consider the following class declaration: public class Circle { private double r

Question

Consider the following class declaration:
public class Circle
{
private double radius;
public Circle(double r)
{
radius = r;
}
public double getArea()
{
return Math.PI * radius * radius;
}
public double getRadius()
{
return radius;
}
}

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

{
String str;
str = "Radius: " + radius +" Area: " + getArea();

}

b. 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.

public(c)
{
boolean status;

if (c.getRadius() ==)
status = true;
else
status = false;

return status;
}

c. 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 that is greater than the area of the calling object, or false otherwise.

public boolean greaterThan(Circle c)

{

boolean status;

if ()

status = true;

else

status = false;

return status;

Explanation / Answer

public class Circle {
private double radius;

public Circle(double r) {
radius = r;
}

public double getArea() {
return Math.PI * radius * radius;
}

public double getRadius() {
return radius;
}

@Override
public String toString() {
String str;
str = "Radius: " + radius + " Area: " + getArea();
return str;
}

public boolean equals(Circle c) {
boolean status;

if (c.getRadius() == this.getRadius())
status = true;
else
status = false;

return status;

}

public boolean greaterThan(Circle c)

{

boolean status;
if (c.getArea() > this.getArea())
status = true;
else
status = false;
return status;
}

}

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