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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 ...

HashTable in java 32.

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

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

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

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

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

In this video, we solve an important Java interview question: Find the K-th distinct (non-repeating) element using Map in Java.

DAY 3/30 – equals() vs hashCode() in Java #shorts #java #30daychallenge DAY 3/30 – equals() vs hashCode() in Java ...

GFG POTD 7 January — Count Distinct Elements in Every Window | EASY & OPTIMIZED SOLUTION In this video, we solve the ...

Three things will help you in almost any Java interview. 1. HashMap — know how hashing works, collisions, resizing, time ...

Learn how to solve the Isomorphic Strings problem efficiently using Hash Maps! In this video, we break down the logic behind ...

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

Subarrays With At Most K Distinct Integers | Sliding Window | Two Pointer Technique | GFG Solution In this video, we solve the ...