# Java 8 : Find union and intersection of two Lists (ArrayLists)

This tutorial shows you how to find union and intersection of two Lists (ArrayLists).

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# Java 8 : Find union and intersection of two Lists (ArrayLists)

# Java : How to find intersection of two Sets

# Programs to Find Common Elements between Two Unsorted Arrays

This tutorial shows you how to find union and intersection of two Lists (ArrayLists).

This tutorial explains you two ways to find intersection of two Sets, i.e., using Java 8 Stream feature and Set’s retainAll() method.

Given set of two unsorted arrays as input, the goal is to find common elements between them in an efficient way. Let’s solve this problem using the following methods i.e., Method 1: Iterative approach, Method 2: Using HashSet and Method 3:… Read More!