Collections Articles | Backend Study Lab

Java May 10, 2026 5 min read

Time Complexity of Java Collections

A practical reference for Java collection time complexity, including ArrayList, LinkedList, HashMap, TreeMap, HashSet, and PriorityQueue.

Java Mar 15, 2026 4 min read

A practical explanation of ConcurrentHashMap in Java, including thread safety, atomic methods, iteration behavior, and common mistakes.

Java Mar 8, 2026 3 min read

Learn what HashMap load factor means in Java, how it affects resizing, memory usage, and lookup performance.

Java Mar 1, 2026 3 min read

Compare ArrayList and LinkedList in Java by access patterns, insertion cost, memory overhead, and practical backend usage.