Write a class of objects named Circle that remembers information about a circle. You must include the following public members. It may help you to know that there is a constant named Math.PI storing the value of $\backslash$pi $,$ roughly $3\mathrm{.}14159.$

member name description

Circle$($r$)$ constructs a new circle with the given radius as a real number

area$()$ returns the area occupied by the circle

circumference$()$ returns the distance around the circle

getRadius$()$ returns the radius as a real number

toString$()$ returns a string representation such as "Circle$\{$radius$=2\mathrm{.}5\}"$

You should define the entire class including the class heading, the private fields, and the declarations and definitions of all the public methods and constructor.