---
title: "What is padding? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips"
url: https://daily.dev/posts/what-is-padding---cracking-the-java-coding-interview-javalanguage-javacoding-javatips-gqqp8nveb
source_url: https://www.youtube.com/watch?v=EAE3lPYdoq8
type: video:youtube
source: "Java (Official Oracle)"
published: 2026-06-12T10:19:02.454Z
updated: 2026-06-12T10:19:17.684Z
tags: ["java", "jvm"]
reading_time: 1
upvotes: 0
comments: 0
language: en
---

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# What is padding? - Cracking the Java Coding Interview #javalanguage #javacoding #javatips

**[Java \(Official Oracle\)](https://daily.dev/sources/java-oracle)** · 1 min read · 0 upvotes · 0 comments

## Summary

Explains memory padding in Java — the practice of inserting unused bytes to align data at addresses divisible by 4 or 8, which allows CPUs to read and write 32-bit or 64-bit words more efficiently. The JVM automatically handles padding and can optimize object memory layout to minimize it. Also briefly mentions that JDK 22's memory API supports reading unaligned data for cases where files lack padding.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.youtube.com/watch?v=EAE3lPYdoq8>

---

Tags: [#java](https://daily.dev/tags/java), [#jvm](https://daily.dev/tags/jvm)

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