CircleClass - Java Example Class

/* Java Example Class
   Author: Jamie McGibbon
   Date: July 11, 2013
   http://TechnicalCafe.com
*/

public class CircleClass{

//attributes of the CircleClass class
public final double PI = 3.14159;
public double radius;

//constructor method (will have a parameter of type double for the radius)
public CircleClass(double radius){

  //using the "this" reserveword, we can take the value from
  //the "radius" variable that's in the constructor, and store
  //it in the class variable called "radius", as "this" refers
  //to the variable or attrivute that's in the class.
  this.radius = radius;

}



//methods of the CircleClass class

public double findArea(){

  return PI*(radius*radius);

  //We can just use "radius" here, since we are refering to
  //the class variable, called "radius", as the "radius" variable
  //in the constructor method is not in the scope of this method,
  //meaning we can't use it.
}

public double findCircumference(){

  return 2*PI*radius;

  //Like with the previous method, we can just the "radius" here,
  //since we want to use the class (instance) variable for "radius",
  //and not the one used as a parameter for the constructor method,
  //which is not in the scope of this method anyway.
}


}