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Editorial Team
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Asked: 2026-05-29T06:38:08+00:00

The java.util.LinkedList does not allow you to quickly remove a given object in the

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The java.util.LinkedList does not allow you to quickly remove a given object in the list. The remove(object) method performs a linear search to find the object in the list so it can remove it. Since this is a double linked-list, it would be nice to remove by just updating the pointers (node.prev and node.next).

What is the Java standard solution for this problem?

NOTE1: I don’t want to remove while iterating. I know that is fast, but I am not iterating through my elements in the first place.

NOTE2: To make it simple: Given an object O that I know it is in a double linked-list, I want to quickly remove O from that list (by updating the pointers) without having to linear search for it in the list, as java.util.LinkedList does.

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1 Answer

  1. Editorial Team

    You should take a look at the LinkedHashSet class. Basically it’s a HashSet that maintains a doubly-linked list among its entries. It supports retrieval (and thus also deletion) of an element in O(1) (hopefully). Check the link for the specification on the how it handles the elements order in case of reinserting an entry and other details.

    EDIT:

    If you need to store duplicates you can take a look at the Guava LinkedHashMultiset (never used so far). The Guava user guide on Multiset is here.

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