Given the classes above, what output is produced by the following code?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
Given the classes above, what output is produced by the following code?
CClass[] elements = {new AClass(), new BClass(), new CClass(), new DClass()};
for (int i = 0; i < elements.length; i++) {
System.out.println(elements[i]);
elements[i].method1();
System.out.println();
elements[i].method2();
System.out.println();
System.out.println();
}
Please answer both. Thank you.
Transcribed Image Text:Assume that the following classes have been defined:
public class CClass {
public String toString() {
return "c";
}
public void method1() {
System.out.print("c 1 ");
}
public void method2() {
System.out.print("c 2 ");
}
}
public class BClass extends Cclass {
public String toString() {
return "b";
}
public void method2() {
System.out.print("b 2 ");
super.method2();
}
}
public class Aclass extends BClass {
public void method2() {
System.out.print("a 2 ");
method1();
}
}
public class DClass extends BClass {
public void method1() {
System.out.print("d 1 ");
method2();
}
}
![What will be the output of the following code?
class A
{
void callthis() {
System.out.println(“Inside Class A's Method!");
}
}
class
extends A
{
void callthis() {
System.out.println(“Inside Class B's Method!");
}
}
class C extends A{
void callthis() {
System.out.println(“Inside Class C's Method!");
}
}
class DynamicDispatch {
public static void main(String args[]) {
new A();
new B();
new C();
A ref;
b;
A a =
B b
C C =
ref
ref.callthis();
ref = c;
ref.callthis();
ref = a;
ref.callthis();
}
}](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffc9d2ec1-c283-4f84-99da-3ed21de02323%2F4cfdc6eb-021c-46ca-b6c7-d7b1bda4d9ca%2Fk6w1z7_processed.png&w=3840&q=75)
Transcribed Image Text:What will be the output of the following code?
class A
{
void callthis() {
System.out.println(“Inside Class A's Method!");
}
}
class
extends A
{
void callthis() {
System.out.println(“Inside Class B's Method!");
}
}
class C extends A{
void callthis() {
System.out.println(“Inside Class C's Method!");
}
}
class DynamicDispatch {
public static void main(String args[]) {
new A();
new B();
new C();
A ref;
b;
A a =
B b
C C =
ref
ref.callthis();
ref = c;
ref.callthis();
ref = a;
ref.callthis();
}
}
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