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GRGanesh Rama Hegdeandroidavatar.hashnode.devNov 2, 2025 · 4 min read

Chapter 15 - Coding the SearchImageUseCase (Domain layer)

Before we start working on the same blueprint we used earlier for the GetArtUseCase, let us pause for a moment and depict the data flow in the form of a flowchart. This will help gauge the progress of the second use case - SearchImageUseCase. This us...

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MJMohit jainjainmohit0807.hashnode.devAug 23, 2025 · 6 min read

Sealed Classes in Java

Sealed classes are one of the biggest “modern Java” features that came after Java 8, finalized in Java 17 (LTS). They give you more control over inheritance and make class hierarchies safer and easier to reason about. 1. The problem they solve In Ja...

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AKAbhinav Kmasterjava.hashnode.devApr 24, 2025 · 4 min read

Mastering Sealed Classes in Java: Model Hierarchies with Confidence

Introduction "Simplicity is the ultimate sophistication." – Leonardo da Vinci Imagine you're working on a payment processing system. You’ve modeled different payment statuses using a class hierarchy: Success, Failed, and Pending. Weeks later, a new...

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MDMirna De Jesus Camberocode-like-a-woman.hashnode.devApr 7, 2025 · 4 min read

Modern Java Features: Sealed Classes

Sealing a class or interface restricts the list of subclasses or implementations to a predefined set. For example, consider defining a Shape and restricting subclasses to be only triangles and squares. public class SealedClasses { sealed class Sh...

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ADAditya Dascodingandlearning.hashnode.devFeb 24, 2025 · 5 min read

Understanding Different Types of Classes in Kotlin with Real-World Examples

Kotlin provides various types of classes, each designed for specific use cases. In this blog, we will break them down using real-world analogies, code examples, and key differences. 1️⃣ Normal Class (class) A normal class is used to create objects th...

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AKabhishek kumaraksilearntocoder.hashnode.devSep 23, 2024 · 5 min read

Concept of Delegates

What is Delegates? First of all in our mind we have a question that there is small "delegate" and there is Capital "Delegate". What it is mean and why there is small and capital in terms of "delegate" and "Delegate". Before resolving above question L...

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OTOmkar Terbhaiomkarterbhai.comJun 4, 2024 · 4 min read

Sealed Classes - JDK 17

JDK 17 has introduced a lot of new features, one of them is Sealed Classes. Let's understand what are sealed classes and why were they introduced. We will not use the Animal -> Dog -> Red Dog -> Multicolor Dog or House -> Door -> Mouse type examples ...

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HSHardik Sachanhardiksachan.comFeb 7, 2023 · 4 min read

Guide to Sealed Classes in Kotlin for Improved Code Organization

In the last article, we covered data classes in Kotlin. We saw how they simplify class creation and make it faster with less coding. Now, let's explore Sealed Classes. Sealed Classes in Kotlin are a specialized form of abstract classes. They limit su...

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NBNitish Bhattnitishbhatt.hashnode.devJan 14, 2023 · 2 min read

Sealed Classes in Kotlin

Kotlin sealed classes are a powerful tool for creating restricted class hierarchies in which an object can only have one of the specified types. They are similar to Enums, but with additional features Implementing Kotlin Sealed Classes A sealed class...

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KPKrish Parekhkrishparekh.hashnode.devOct 26, 2022 · 5 min read

Enum vs Sealed Classes

The article aims to explain the below list of things: Enum Classes Why do we use enum classes in the first place ? How to use enum classes ? Usage of enum classes using when block Problems with the enum classes Sealed Classes...