Question

public class Polymorph public static class CAL public void printHello System.out.println("Hya"); public static class w extends CAC public void printHello System.out.println("Howdy"); public static class PB extends WE public void printtello System.out.println("Hello") public static void main(String[] args) { A l = new CÁO: CA ab - (CA) new W(); CA ac - (CA) new PC); Wbc - (W) new P80; 33.printHello(); ab.printHello(); ac.printHello(); be.printHello(); Type your answer, do not copy/paste

Answer 1

#source code:

public class Polymorph{

public static class CA{

public void printHello(){

System.out.println("Hiya");

}

}

public static class W extends CA{

public void printHello(){

System.out.println("Howdy");

}

}

public static class PB extends W{

public void printHello(){

System.out.println("Hello");

}

}

public static void main(String args[]){

CA aa=new CA();

CA ab=(CA) new W();

CA ac=(CA) new PB();

W bc=(W) new PB();

aa.printHello();

ab.printHello();

ac.printHello();

bc.printHello();

}

}

i public class Polymorph{ public static class CA{ public void printHello() { System.out.println("Hiya"); public static class w extends CA{ public void printHello(){ System.out.println("Howdy"); NNNNSBERGEUREBOVOUAWN public static class PB extends W{ public void printHello(){ System.out.println("Hello"); public static void main(String args[]), CA aa=new CA(); CA ab=(CA) new W(); CA ac=(CA) new PB(); W bc=(W) new PB(); aa.printHello(); ab.printHello(); ac.printHello(); bc.printHello(); 26 27 } 28 }

#output:

user user-Latitude - 3490:-/Desktop$ javac Polymorph.java user@user-Latitude - 3490:-/Desktop$ java Polymorph Hiya Howdy Hello Hello user@user-Latitude - 3490:-/Desktops |

so answer:

first line:Hiya

second line: Howdy

third line:Hello

forth line:Hello

explantation:

first line:

we have class CA it not extend to another class it was unique class

so we create object to CA call the method in the CA class we have Hiya that was output

second line:

we have class W that was inherited from class CA so CA is base or parant class and W is derived class here

CA and W class both have same method so here polymorphisam exists but it was over ride in child class so

we get output as Howdy

thrid line:

PB class it was inheriteds from W class now W is parent class to PB and PB is child class but now PB class have two class properties such CA class and W class too because W class is child class to CA

but in PB class also same method here also over ride takes place so we get output as "Hello"

forth line:

coming final object which is bc so with respec to W and PB so we get output as "Hello"