and never misuse hashCode as key never misuse hashCode as key important to implement it carefully never misuse hashCode as key never misuse hashCode as key never misuse hashCode as key The 3 things you should know about hashCode() and never misuse hashCode as key never misuse hashCode as key and Three things ... and Mã Hashcode The 3 things you should know about hashCode() and important to implement it carefully and The 3 things you should know about hashCode() and never misuse hashCode as key and