Why TreeSet Throws ConcurrentModificationException and How to Fix It

An in‑depth look at why Java’s TreeSet can trigger ConcurrentModificationException under high concurrency, exploring the red‑black tree’s non‑atomic operations, thread scheduling nuances, and how various concurrent set implementations—synchronized wrappers, read‑write locks, ConcurrentSkipListSet, CopyOnWriteArraySet, and custom designs—compare in performance and suitability.

CollectionsConcurrentModificationExceptionJava

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Why TreeSet Throws ConcurrentModificationException and How to Fix It

Architecture Digest

Sep 19, 2023 · Fundamentals

Various Ways to Remove Duplicates from a List in Java Using Set Implementations and Streams

This article demonstrates six different techniques for eliminating duplicate elements from a Java List, including HashSet, TreeSet, LinkedHashSet, iterator-based removal, Stream distinct, and manual contains checks, each with complete code examples and output illustrations.

CollectionsJavaSet

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Various Ways to Remove Duplicates from a List in Java Using Set Implementations and Streams

Selected Java Interview Questions

Nov 13, 2020 · Fundamentals

Various Methods to Remove Duplicates from a Java List and Their Performance Comparison

This article demonstrates five different techniques for eliminating duplicate integers from a Java List—including nested loops, contains checks, HashSet, TreeSet, and Java 8 streams—provides complete source code for each method, and compares their execution times under different random data ranges.

JavaListStream

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Various Methods to Remove Duplicates from a Java List and Their Performance Comparison

Programmer DD

Apr 19, 2019 · Fundamentals

Master Java’s Comparator: Sorting Collections, Streams, and Sets Made Easy

This article explains Java's Comparator interface, its compare method, lambda definitions, and how to use it with Collections.sort, List.sort, Arrays.sort, Stream.sorted, as well as with SortedSet and SortedMap structures, covering static and default methods like reversed, nullsFirst, thenComparing, and more.

ComparatorJavaLambda

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Master Java’s Comparator: Sorting Collections, Streams, and Sets Made Easy