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HashMap in Java stores data in key–value pairs for fast access In this video, learn how HashMap works and when to use it.

HashMap in java 27.

In this video, DSA in Java – HashMap 02, we cover important concepts of HashMap in Java as part of the Java in One Shot series.

Choosing the wrong Map in Java can silently kill performance or break your multithreaded code ⚠️ In this video, we deep-dive ...

Java HashMap Explained from Scratch — Internals Made Easy In this video, I explain how Java HashMap works internally ...

In this video, we solve the Two Sum problem (LeetCode 1) and explain both the brute force and optimized HashMap approaches ...

This section we are going to design hashmap rick problem 706 is intended to design hashmap give you a brief background about ...

Why does ConcurrentHashMap NOT allow null keys or null values, while HashMap does?

In this video, we solve the problem “Substrings with K Distinct” using an efficient Sliding Window technique. You are given a string ...

Ride for Java lovers on HashMaps, keys, and lightning lookups.

Learn how to solve the "Subarray Sum Equals K" problem (LeetCode 560) using the optimized Prefix Sum and HashMap ...

In this video of code decode we have explained most asked java tricky interview questions which developers fails to answers ...

In this video, we solve the problem “Subarrays With At Most K Distinct Integers” using an efficient Sliding Window technique ...

Built LeetCode 706 Design HashMap NO built-in Library! put/get/remove method Core: Buckets (lists) + hash % prime. Collisions?

Quick breakdown of a daily LeetCode problem—find the element repeated N times in an array using a simple HashMap approach ...

In this video, we solve the Majority Element problem (LeetCode 169) using Java. We start with the Brute Force approach using ...

Learn how to solve the Intersection of Two Arrays II problem efficiently! In this video, we break down two popular approaches to ...

LeetCode 49 Group Anagrams! Group strings with the same chars & freqs. Pro Tip: Sorted chars = anagram key! "eat","tea" both ...