Why is the next equals method in conflict with the contract for the equals method public boolean equals (Object anObject){ return true; }

Because it returns true, even for null values passed to this method

Because it doesn't compare the values of the instance variables of the objects

Quiz

Comparing objects for equality

alim586 3 questions

Take the quiz

1The default implementation of the equal method compares only whether two object variables refer to the same object
1. ATrue
2. BFalse
2See the following equals method defined in class BankAccount.

class BankAccount(){

String accNumber;
int accType;

public boolean equals (Object obj){
if(obj instanceOf BankAccount){
BankAccount b = (BankAccount) obje;
return(acctumber.equals(b.accNumber) && accType == b.accType);
}
return false;
}
}
Does this method violates the contract for the equals method?
1. ATrue
2. BFalse
3Why is the next equals method in conflict with the contract for the equals method

public boolean equals (Object anObject){
return true;
}
1. ABecause it returns true, even for null values passed to this method
2. BBecause it doesn't compare the values of the instance variables of the objects
3. CBoth answers are true

Description: Quiz on Comparing objects for equality, created by alim586 on 20/06/2015.
Author: alim586
Language: English
Views: 21
Tags: java objects equality oca java se7
Rating: No ratings yet
Rate this quiz
Rate this quiz