在 Java 中使用对或 2 元组

问题描述

Java 中的我的 Hashtable 将受益于具有元组结构的值.我可以在 Java 中使用什么数据结构来做到这一点?

My Hashtable in Java would benefit from a value having a tuple structure. What data structure can I use in Java to do that?

Hashtable<Long, Tuple<Set<Long>,Set<Long>>> table = ...

推荐答案

我认为 Java 中没有通用的元组类，但自定义一个可能像下面这样简单:

I don't think there is a general purpose tuple class in Java but a custom one might be as easy as the following:

public class Tuple<X, Y> { 
  public final X x; 
  public final Y y; 
  public Tuple(X x, Y y) { 
    this.x = x; 
    this.y = y; 
  } 
} 

当然，如何进一步设计这个类有一些重要的含义，涉及平等、不变性等，特别是如果您计划使用实例作为散列键.

Of course, there are some important implications of how to design this class further regarding equality, immutability, etc., especially if you plan to use instances as keys for hashing.