Top "Hashcode" questions

Remove duplicate objects from a ArrayList in Android

I know this has be discussed over and over again here, but none of the examples I've tried worked for …

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Creating a hash from several Java string objects

What would be the fastest and more robust (in terms of uniqueness) way for implementing a method like public abstract …

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Why are hashCode() and getClass() native methods?

I checked the source code of Object class where I found that method declaration of getClass() was public final native …

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What's a good recipe for overriding hashcode in Dart?

I find myself wanting to override hashcode and == for an object, and I'm wondering if there are best practices for …

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Creating the GetHashCode method in C#

What is the best way to create your own GetHashCode method for a class in C#? Suppose I have a …

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Java hashCode for a Point class

I have a simple custom Point class as follows and I would like to know if my hashCode implemention could …

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Why are XOR often used in java hashCode() but another bitwise operators are used rarely?

I often see code like int hashCode(){ return a^b; } Why XOR?

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What is an appropriate `GetHashCode()` algorithm for a 2D point struct (avoiding clashes)

Consider the following code: struct Vec2 : IEquatable<Vec2> { double X,Y; public bool Equals(Vec2 other) { return X.…

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Why doesn't String's hashCode() cache 0?

I noticed in the Java 6 source code for String that hashCode only caches values other than 0. The difference in performance …

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How to teach eclipse to generate compact equals() and hashCode() from the jdk 7 Objects class?

Some days ago we switched to Java 7 within my Company - finally! Jay \o/ So I found out about the …

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