Deque Operations: Remove and Poll First Methods Explained | Java Collection Framework

Welcome to our Java Collection Framework tutorial series! In this video, we'll dive into the `removeFirst()` and `pollFirst()` methods of the Deque interface in Java.

**Understanding Deque Operations:**
Deque, short for Double Ended Queue, is a versatile data structure in Java that allows insertion and removal of elements from both ends. The `removeFirst()` and `pollFirst()` methods are used to remove the first element from the Deque, but they differ in behavior when the Deque is empty.

**Using `removeFirst()`:**
The `removeFirst()` method throws a NoSuchElementException if the Deque is empty. It removes and returns the first element of the Deque, or throws an exception if the Deque is empty.

**Using `pollFirst()`:**
On the other hand, the `pollFirst()` method returns null if the Deque is empty, instead of throwing an exception. It removes and returns the first element of the Deque, or returns null if the Deque is empty.

**Practical Examples:**
We'll provide practical examples demonstrating how to use these methods effectively to remove elements from the front of a Deque. You'll learn when to use `removeFirst()` and when to use `pollFirst()` based on your specific use case.

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Deque ( Remove & Poll First Methods) | Java Collection Framework

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