hashcode implementation based on the Object Class

Question

hi guys i have a little problem here to solve.

I have created an equals() method which is only based on the class of the object so that if two obj are of the same class the obj1.equals(obj2) return true. now my question is, How do i implement a hashcode() based only on the obj Class ??

@Override
public boolean equals(Object obj){
    if(obj.getClass() == this.getClass()){
        return true;
    }else{
        return false;
    }
}

return 79658765; (for example: any integer would do). Why are you doing that? That seems like a terrible idea. — JB Nizet
– JB Nizet, Commented May 14, 2017 at 8:19
You can return hashcode of full class name. But Why you are writing such terrible equals method ? Please elaborate more. — Sagar Gandhi
– Sagar Gandhi, Commented May 14, 2017 at 8:20
What's the use case for this? It seems like something that will blow up in your face... — Boris the Spider
– Boris the Spider, Commented May 14, 2017 at 8:23

Eran · Accepted Answer · 2017-05-14 08:19:26Z

1

You could return the hashCode of the Class instance:

public int hashCode ()
{
    return getClass().hashCode();
}

This would ensure that two objects which are equal based on your equals() implementation would have the same hashCode().

answered May 14, 2017 at 8:19

Eran

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