---
title: "Discussion on \"The Four Pillars of OOP in Java: A Quick Overview 🧱\" | Hashnode"
description: "Discussion on \"The Four Pillars of OOP in Java: A Quick Overview 🧱\". Object-Oriented Programming (OOP) is the backbone of Java. Every class you write, every Spring bean you inject and every library you use is built on four ideas: encapsulation, inheritance, polymorphis"
url: "https://hashnode.com/posts/the-four-pillars-of-oop-in-java-a-quick-overview/6af2846b067848452be4d7d2"
---

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# [The Four Pillars of OOP in Java: A Quick Overview 🧱](https://oops-concepts.hashnode.dev/the-four-pillars-of-oop-in-java-a-quick-overview?utm_source=hashnode&utm_medium=feed)

Object-Oriented Programming (OOP) is the backbone of Java. Every class you write, every Spring bean you inject and every library you use is built on four ideas: encapsulation, inheritance, polymorphis

1d ago · 5 min read · oops-concepts.hashnode.dev  
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[Sahil Maddi](https://hashnode.com/@CollaborativeCoder4U)

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