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

Test

Comparing objects for equality

alim586 3 preguntas

Hacer el test

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

Descripción: Test sobre Comparing objects for equality, creado por alim586 el 20/06/2015.
Autor: alim586
Idioma: English
Visitas: 21
Etiquetas: java objects equality oca java se7
Valoración: Aún sin valoraciones
Valora este test
Valora este test