I'm overriding the equals and hashcode methods for a simple container object for two ints. Each int reflects the index of another object (it doesn't matter what that object is). The point of the cl...

I have a HashMap with coordinates as keys. Coordinates have 3 longs holding the x, y and z coordinate. (Coordinate is and needs to be a custom class, the coordinates need to be longs). Now i want...

I have a simple custom Point class as follows and I would like to know if my hashCode implemention could be improved or if this is the best it's going to get. public class Point { private final ...

I want to know the probability of getting duplicate values when calling the GetHashCode() method on string instances. For instance, according to this blog post, blair and brainlessness have the sam...

I tried to write a small program to demonstrate hash collisions in java when only equals is overridden and not hashcode() method. This was to prove the theory that two unequal objects can have the ...

I have sorted lists of filenames concatenated to strings and want to identify each such string by a unique checksum. The size of these strings is a minimum of 100 bytes, a maximum of 4000 bytes, a...

Like many of you, I use ReSharper to speed up the development process. When you use it to override the equality members of a class, the code-gen it produces for GetHashCode() looks like: public ov...

I'm hashing a large number of files, and to avoid hash collisions, I'm also storing a file's original size - that way, even if there's a hash collision, it's extremely unlikely that the file sizes ...

I know when we are passing objects we are passing its reference as a value. But this value you get is using the hashcode() method right (according to my tests it's the same)? Since hashcode() is no...

Though two different objects may have the same hash code, however, System.identityHashCode() seems return the memory pointer of the object. I guess there could be no exception in 32-bit JVM impleme...

I had the following code to generate a hash of an object: public int GetHashCode(MyType obj) { return (obj.Prop1.GetHashCode() + obj.Prop2.GetHashCode() + obj.Prop3.GetHashCode()).GetHashCode(); ...

If I'm hashing size-constrained similar data (social security numbers, for example) using a hash algorithm with a larger byte size than the data (sha-256, for example), will the hash guarantee the ...

I have a pretty complex object and I need to get uniqueness of these objects. One solution can be done by overriding GetHashCode(). I have implemented a code noted below: public override int GetHa...

I have a system that requires a unique 6-digit code to represent an object, and I'm trying to think of a good algorithm for generating them. Here are the pre-reqs: I'm using a base-20 system (no ...

So I'm reading up about hash tables, hash functions etc. I was intrigued to read on wikipedia about how "dynamic perfect hashing" involves using a second hash table as the data structure to store m...