hashCode « HashTable « Java Collection Q&A

1. how does the hashCode() method of java works?    stackoverflow.com

Hello I am curious how java generates hash values by using hashCode() method of the Object API ?

2. hash of java hashtable    stackoverflow.com

The hashCode of a java Hashtable element is always unique? If not, how can I guarantee that one search will give me the right element?

3. Good Hash Function for Strings    stackoverflow.com

I'm trying to think up a good hash function for strings. And I was thinking it might be a good idea to sum up the unicode values for the first ...

4. Java Hashtable, if the key is string? if the string is same, it will remove all value with the same string    stackoverflow.com

I need a value of Someclass based on the key. And the key can be a string, boolean, or another Object, that's why I used Object as key. But I ...

5. Java Hashtable .containsKey(String key) is returning true even when the strings and hashcodes are different... How?    stackoverflow.com

I'm currently having some issues with my Hashtable in java, where FEightPuzzle is a class which I've created. Inside my class I have a String which is storing the key for each ...

6. How do I make a good hash function for large Strings?    stackoverflow.com

Here's my hash function for Strings

public class GoodHashFunctor implements HashFunctor {

    @Override
    public int hash(String item) {

        String ...

7. Why the hashtable.hashCode() returns negative numbers    coderanch.com

Hello all Im trying to construct hashtable that contains hashtables as values and hashCode of the hash tables as the keys The thing is that the hashCode() values are always negative numbers and they are not unique even so the values of the hashtable Different. how can it be ? Doesnt it suppose to be unique number? And not negative?