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class Cohesion {

int a, b, c;

public Cohesion(int i, int j, int k) {

// TODO Auto-generated constructor stub

a = i;

b = j;

c = k;

}

void polymorphy() {

if ((b * c) > 0) {

System.out.println("A reference variable of a superclass can be assigned an object of "

+ "any subclass derived from that superclass.");

}

System.out.println();

if ((c * b) > 0) {

System.out.println("When a reference to a subclass object is assigned to a superclass reference variable, "

+ "you will have access only to those parts of the object defined by the superclass.");

System.out.print("It makes sense because superclass has no knowledge of what a subclass adds to it.");

}

}

}

class Subversion extends Cohesion {

int d, e, f;

public Subversion(int i, int j, int k) {

super(i, j, k);

// TODO Auto-generated constructor stub

d = i;

e = j;

f = k;

}

void polymorphy() {

System.out.println("When an overridden method is called through a superclass reference variable, "

+ "Java determines which version of that method to execute based upon the type of the object "

+ "being referred to at the time the call occurs.");

}

}

public class Polymorphism {

public static void main(String[] args) {

// TODO Auto-generated method stub

Cohesion superCohesion = new Cohesion(2, 4, 6);

Subversion subversion = new Subversion(8, 10, 12);

Cohesion superReferenceVariableCohesion;

superReferenceVariableCohesion = superCohesion;

superReferenceVariableCohesion.polymorphy();

System.out.println("\n");

superReferenceVariableCohesion = subversion;

superReferenceVariableCohesion.polymorphy();

}

}