Select all of the true statements about Java's root class Object: it has the hashCode method, which returns an integer hash code two unequal objects may have the same hash code, but you should implement code the hashCode method to avoid too many such cases you should override the hashCode method whenever the equals method is overridden to ensure that two equal objects return the same hash code during the execution of a program, invoking the hashCode method multiple times returns the same integer, provided that the object's data are not changed by default, the method returns the memory address for the object

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
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Question 25
Select all of the true statements about Java's root class Object:
it has the hashCode method, which returns an integer hash code
two unequal objects may have the same hash code, but you should implement
the hashCode method to avoid too many such cases
you should override the hashCode method whenever the equals method is
overridden to ensure that two equal objects return the same hash code
during the execution of a program, invoking the hashCode method multiple
times returns the same integer, provided that the object's data are not changed
by default, the method returns the memory address for the object
Transcribed Image Text:Select all of the true statements about Java's root class Object: it has the hashCode method, which returns an integer hash code two unequal objects may have the same hash code, but you should implement the hashCode method to avoid too many such cases you should override the hashCode method whenever the equals method is overridden to ensure that two equal objects return the same hash code during the execution of a program, invoking the hashCode method multiple times returns the same integer, provided that the object's data are not changed by default, the method returns the memory address for the object
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