Closed yesterday.

Closed yesterday.

Closed yesterday.

I was making one of my personal java projects. In that project I put the hash map list in 1 directory and the file I was using that hash map list. I’m not able to access the hash map list and its constructors in the main file. Please help me with that.

I have a map that is already populated, When calling map.get(key) If element against that key exists it return it’s corresponding value which can be null and if not then still null. I wanna know whether the element for that key exists in the map or not.

I hope that I didnt miss something simple, but here is my code:

There are two lists of map data that have been parsed.
One is the original data, and the other is a data map matched by calculated values.
In the original data, ids can be duplicated, and in the calculated map, ids cannot be duplicated.

What method does HashMap use, Objects.hash() or Object.hashCode()? I ask because, as far as I know, if HashMap uses hash(), that means the hash result of two different objects can be the same. And if HashMap uses hashCode(), that means the hash result of any two different objects must be different.

what is the method hashmap ( in java ) uses for hashing ( hash ( ) or hashcode ( ) ) ?
i ask this question because as far as i know if hashmap uses hash ( ) that means that the hash result of two different object can be the same and if hashmap uses hashcode ( ) that means that the hash result of any two different object must be different

what is the method hashmap ( in java ) uses hash ( ) or hashcode ( ) ?
i ask this question because as far as i know if hashmap uses hash ( ) that means that the hash result of two different object can be the same and if hashmap uses hashcode ( ) that means that the hash result of any two different object must be different