Abstraction

 Quality Thought is recognized as the best software testing institute in Hyderabad, offering top-notch training in manual testing, automation testing, and full stack testing tools. With a focus on industry-relevant curriculum and hands-on practice, Quality Thought prepares students for real-world software testing challenges. The institute provides expert-led training on popular tools and frameworks like Selenium, TestNG, Jenkins, Git, Postman, JIRA, Maven, and Cucumber, covering both frontend and backend testing essentials.


Quality Thought’s Full Stack Testing course is specially designed to make students proficient in both manual testing fundamentals and automated testing tools, along with exposure to API testing, performance testing, and DevOps integration. The institute stands out for its experienced trainers, live projects, placement support, and flexible learning options including classroom and online modes.


Whether you are a fresher aiming for a job or a working professional looking to upskill, Quality Thought offers customized learning paths. Its strong industry connections ensure regular placement drives and job interview

Abstraction


Abstraction is one of the four main pillars of Object-Oriented Programming (OOP) in Java. It means hiding complex internal details and showing only the essential features of an object or system. It helps simplify code by focusing only on what an object does, not how it does it.


In Java, abstraction is achieved using two ways:


Abstract Classes


Interfaces


🔹 Abstract Class:

An abstract class is declared using the abstract keyword. It can have both abstract methods (no body) and concrete methods (with body).


java

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Edit

abstract class Animal {

    abstract void sound();  // Abstract method

    void sleep() {

        System.out.println("Sleeping...");

    }

}

A class that extends an abstract class must implement all abstract methods.


🔹 Interface:

An interface contains only abstract methods (until Java 7) or default/static methods (from Java 8). Classes implement interfaces to define the behavior.


java

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Edit

interface Vehicle {

    void start();  // Abstract method

}

✅ Benefits of Abstraction:

Reduces complexity


Enhances code readability


Improves security by exposing only necessary parts


Supports loose coupling and scalability


🌟 Real-Life Example:

When you use a mobile phone, you just press buttons to make calls or take photos. You don’t need to know the internal hardware – that's abstraction!

Learn more

Java Methods and Parameters

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