为什么 Java 没有 Pair

Question

你看 C++ stl 都有 std::pair
android 还写了 android.util.Pair

Answer 1

You can look at Entry<K,V>, which is actually similar to pair

Answer 2

std::pair acts as an element in std::map

Map.Entry also acts as an element in Map

This is the general idea

Answer 3

Google’s Guava summarizes it well: Tuples for n >= 2