Class Circle

java.lang.Object
  Circle

public class Circle
extends java.lang.Object

Constructor Summary

Circle()
The diameter of the circle is 10cm by default.

Circle(double d)
The circle can be initialized of other sizes.

Method Summary

double	calculatetCircumference() Calculate the circumference of the circle
double	getDiameter() Return the diameter of the circle
double	grow(double factor) Make the circle bigger
double	shrink(double factor) Make the circle smaller
java.lang.String	toString() Report the diameter of the circle by a string

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Circle

public Circle()

The diameter of the circle is 10cm by default.

Circle

public Circle(double d)

The circle can be initialized of other sizes.

Parameters:

d - diameter of the new circle

Method Detail

grow

public double grow(double factor)

Make the circle bigger

Parameters:

factor - Centimetres to be added to the diameter

Returns:

updated diameter

shrink

public double shrink(double factor)

Make the circle smaller

Parameters:

factor - Centimetres to be subtracted from the diameter

Returns:

updated diameter

getDiameter

public double getDiameter()

Return the diameter of the circle

Returns:

current diameter

calculatetCircumference

public double calculatetCircumference()

Calculate the circumference of the circle

Returns:

circumference of the circle

toString

public java.lang.String toString()

Report the diameter of the circle by a string

Overrides:

toString in class java.lang.Object

Returns:

a sentence reporting the diameter of the circle