Getting a Constructor of a Class Object
There are two ways of obtaining a Constructor object from a Class object. 

     // By obtaining a list of all Constructors object.
     Constructor[] cons = cls.getDeclaredConstructors();
     for (int i=0; i<cons.length; i++) {
         Class[] paramTypes = cons[i].getParameterTypes();
         process(cons[i]);
     }
     
     // By obtaining a particular Constructor object.
     // This example retrieves java.awt.Point(int, int).
     try {
         Constructor con = 
           java.awt.Point.class.getConstructor(
           new Class[]{int.class, int.class});
         process(con);
     } catch (NoSuchMethodException e) {
     }