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Java Streams: Complete Interview Guide

Tirupati Rao (bitbee)
bitbee
Published in
5 min readJan 4, 2025

Java Streams simplify working with data by introducing a functional programming style. They help process data from collections, arrays, and other sources using operations like filtering, mapping, and reducing.

Streams focus on what to do rather than how to do it, making the code cleaner and more readable.

They are lazy, meaning operations are performed only when needed, and they also support parallel processing for better performance on multi-core systems.

This comprehensive guide will take you through every aspect of Streams, complete with examples, differences between key methods, advanced features, and tips for acing interviews.

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Table of Contents

1. Introduction to Java 8 Streams

2. Benefits of Using Streams

3. Stream Creation

4. Intermediate Operations

— filter()

— map()

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Tirupati Rao (bitbee)
Tirupati Rao (bitbee)

Written by Tirupati Rao (bitbee)

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