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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.

Many Java developers know TreeMap is slower than HashMap, but do you know why? In this video, you'll learn: ✓ Internal ...

Yes, you can use a custom object as a key in HashMap — but only if you follow two critical rules ⚠️ In this video, you'll learn: ...

Using a mutable object as a key in HashMap can silently break your code In this video, you'll learn: ✓ What a mutable key is ...

HashMap in java 27.

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

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

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

The load factor in HashMap looks simple… but it hides a big trade-off ⚖️ In this video, you'll learn: ✓ What load factor actually ...

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

Using a mutable key in HashMap can silently break your application The solution is to make the key immutable In this video, ...

Hash set and Hash map difference in java.

Most Java developers fail this simple-looking question If HashMap.get(key) returns null, does it mean the key doesn't exist?

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

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

Se você sempre se confunde entre List, Set e Map em Java, esse vídeo vai resolver isso de uma vez por todas. Aqui eu explico ...

Ace your Java interviews with top questions on ArrayList, LinkedList, and other Collection classes, explained simply to strengthen ...