Skip to main content

Inheritance in Java

 


What is inheritance in oops?
Inheritance in OOP = When a class derives from another class. The child class will inherit all the public and protected properties and methods from the parent class. In addition, it can have its own properties and methods. An inherited class is defined by using the extends keyword.
Inheritance is an object-oriented programming concept in which one class acquires the properties and behavior of another class. It represents a parent-child relationship between two classes. This parent-child relationship is also known as an IS-A relationship.

Inheritance in Java is a mechanism in which one object acquires all the properties and behaviors of a parent object

Inheritance is a technique of modelling real-world relationships, and OOP is all about real-world objects. Here's an example: a car, a bus, and a bicycle all fall under the umbrella term "vehicle." That is, they have inherited the attributes of the vehicle class, implying that they are all utilised for transportation


what is baseclass/super/parent class

what is derived class /subclass/child class

When to use inheritance?

  1. You can reuse code from the base classes.

Comments

Post a Comment

Popular posts from this blog

Step-by-Step: Launch Browser, Context, and Page in Playwright and Run Test and Configuration (JavaScript)

🎥 Setup Browser, Context, Page & Run Config Test Scripts with package.json & playwright.config.js Step-by-Step: Launch Browser, Context, and Page in Playwright and Run Test and Configuration (JavaScript) 1. Install Playwright You can install Playwright using the following command: npm init playwright@latest 2. Create a Basic Test Script Understand the core Playwright architecture: Element Description browser Controls the browser instance (like Chrome, Firefox, etc.) context Acts like a separate browser profile (cookies, localStorage are isolated) page A single browser tab where interaction happens 3. Run the Test npx playwright test example.spec.js Ways to Run TypeScript Tests Way Command Notes 🟢 Via npx npx playwright test Uses built-in TypeScript support 🟢 With s...
Post a Comment
Read more

Playwright Test Structure in Details -Session-02

🎥 Playwright: test.only, Hooks & Grouping with test.describe Explained Let’s go step-by-step , showing how to build from a single test , to using beforeEach / afterEach , and then organizing things with test.describe . ✅ Step 1: Basic Single Test with test.only import { test, expect } from '@playwright/test' ; test. only ( '🚀 Basic test - check title' , async ({ page }) => { await page. goto ( 'https://example.com' ); await expect (page). toHaveTitle ( /Example Domain/ ); }); test.only ensures only this test runs — great for debugging. ✅ Step 2: Add beforeEach and afterEach import { test, expect } from '@playwright/test' ; test. beforeEach ( async ({ page }) => { console . log ( '🔄 Setting up before each test' ); await page. goto ( 'https://example.com' ); }); test. afterEach ( async ({ page }, testInfo) => { console . log ( `📦 Finished test: ${testInfo.title} `); }); test. only ( ...
Post a Comment
Read more

Playwright Locators in JavaScript (Complete Guide)

🎯 Playwright Locators in JavaScript (Complete Guide) This guide explains each Playwright locator with: ✅ What it is 🕐 When to use ⚙️ How to use it 🎯 Benefits 🧪 Code Examples 🔹 1. Locator by ID ✅ What: Selects an element with a unique id . 🕐 When: Element has a unique id . ⚙️ How: page.locator('#username') 🎯 Benefit: Fast and reliable. <input id="username" /> await page.locator('#username').fill('John'); 🔹 2. Locator by Class ✅ What: Selects by class . 🕐 When: Repeated or styled elements. ⚙️ How: page.locator('.password') 🎯 Benefit: Useful for shared styling. <input class="password" /> await page.locator('.password').fill('12345'); 🔹 3. Locator by Text ✅ What: Matches visible element text. 🕐 When: For buttons, links, etc. ⚙️ How: page.getByText('Login') 🎯 Benefit: Human-readable. <button>Login...
Post a Comment
Read more