**constructors are 'special' 
    They CANNOT be INHERITED

    If a class has no constructor defined, 
    then compiler creates a default constructor(with no arguments) for the class.

    No-argument constructor: 
        A constructor that has no parameter is known as default constructor. 


   public class Crazy{

   }



   public class CrazyClient{
     public static void main(String[]args){

       // no-argument constructor provided by compiler
       Crazy cs157 = new Crazy();

       // toString method inherited from Object superclass
       System.out.printf("\n cs157 is %s\n\n", cs157);

     }

   }

overload
    two or more methods 
         in the same class
    with method headers differing only 
         in number and type of parameters in formal parameter list

    **constructors are 'special' but CAN BE overloaded
       (though programmer does not get to choose name or return type!!!)


   public class WhatsitA{

     private myA;

     public WhatsitA(int a){
       myA = a;
     }
     public WhatsitA(int a, int b){
       myA = a*b;
     }

     public double getADouble(int num){
        return num*num*num;
     }

     public double getADouble(){
        return 2.71828182;
     }

   }

override
    method in a class with 
      EXACT SAME METHOD header as method in super class

    **constructors are 'special' AND CANNOT be overridden or inherited.
       Superclass constructors, however, CAN BE CALLED (ie, invoked)


   public class SpecialB extends WhatsitA{

     // 'looks' like an override but is not
     public SpecialB(int a){
       super(a);
     }

     // 'override' of method in superclass
     public double getADouble(){
       return  -999;
     }
   }