Assume you have the following 3 classes A, B, and C. Their details are left out (only {... } is shown). However, assume that each class has a default constructor defined.public class A { ... }public class B extends A{ ... }public class C extends B { ... }What will happen if the following fragment of code is executed? If there will be anerror, explain it fully.A a = new B();A a1;B b;С сb = (B) a;a1 = b;= (C) a1;

The given sample is written in Java program where below are the classes relationships: Class A: A…

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What will happen if the following fragment of code is executed? If there will be an error, explain it fully.

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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Concept explainers

Math class and its different methods

Java math class consists of arithmetic math methods that performs basic numeric operations such as finding the maximum or minimum of two values, rounding values, logarithmic functions, square root, and trigonometric functions, etc. The Math library functions can be accessed using the header Java.lang.Math. These math methods under Java math class are for our convenience.

Question

Assume you have the following 3 classes A, B, and C. Their details are left out (only {
... } is shown). However, assume that each class has a default constructor defined.
public class A { ... }
public class B extends A{ ... }
public class C extends B { ... }
What will happen if the following fragment of code is executed? If there will be an
error, explain it fully.
A a = new B();
A a1;
B b;
С с
b = (B) a;
a1 = b;
= (C) a1;

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