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 perguntas

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1The default implementation of the equal method compares only whether two object variables refer to the same object
1. AVerdadeiro
2. BFalso
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. AVerdadeiro
2. BFalso
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

Descrição: Quiz sobre Comparing objects for equality, criado por alim586 em 20-06-2015.
Autor: alim586
Idioma: English
Visualizações: 21
Etiquetas: java objects equality oca java se7
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