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You put a value in a HashMap. You know it's there. But when you try to get it back… it's null. This isn't a Java bug. It's an equals() ...

On a vacation right now so can't do a leetcode. I mean I probably can but decided to do hash table instead. Hopefully it's ...

Day 1/150 – Two Sum | LeetCode Interview Question In this video, we solve the Two Sum problem — one of the most frequently ...

Day 5/150 – LeetCode 150 Interview Questions Series (Java) In this video, we solve the “Group Anagrams” problem — a very ...

Welcome to Code-with-Bharadwaj! Hi there! I'm Manu, and I'm excited to help you level up your coding skills.

Why does Java make String immutable? This is one of the MOST ASKED and MOST MISUNDERSTOOD Java interview questions ...

This lecture explains the Map interface in Java with a detailed comparison between HashMap and TreeMap. You will learn how ...

In this audio overview, we break down two of Java's most foundational data structures. We explore why the legacy Hashtable is ...

Day 3/150 – LeetCode 150 Interview Questions Series (Java) In this video, we solve the “Contains Duplicate II” problem — a ...

Welcome to Code-with-Bharadwaj! Hi there! I'm Manu, and I'm excited to help you level up your coding skills.

Why Should You Learn DSA Patterns in 2025? https://www.youtube.com/watch?v=qH2VQY48mg4 DSA Patterns Playlist: ...

This lecture introduces the hashing technique and explains how HashSet works internally in Java. You will understand hashing, ...

HashMap: Fast, non-synchronized, allows one null key. Hashtable: Thread-safe, synchronized, no null. #javashorts #hashmap ...

In this lecture, we discuss LinkedHashMap, Hashtable, and how LinkedHashMap can be used as a cache. This video also ...

In this video, we deep dive into ConcurrentHashMap atomic methods in Java and explain why thread safety alone is not enough.

Erfahren Sie, wie Sie eine `HashMap` in Java korrekt initialisieren und sicherstellen, dass die Daten in Ihren Methoden wie ...

In this video, we compare List vs Set vs Map in Java and explain how they differ within the Java Collection Framework. You'll get a ...

Master Java HashMap with this comprehensive tutorial! Learn all essential HashMap functions with practical examples. Perfect for ...

Confused about List vs Set vs Map? In this short video, we explain the difference between List, Set, and Map data structures, ...