Book Image

Hands-On Automation Testing with Java for Beginners

Book Image

Hands-On Automation Testing with Java for Beginners

Overview of this book

Java is one of the most commonly-used software languages by programmers and developers. Are you from a non-technical background and looking to master Java for your automation needs? Then Hands-On Automation Testing with Java for Beginners is for you. This book provides you with efficient techniques to effectively handle Java-related automation projects. You will learn how to handle strings and their functions in Java. As you make your way through the book, you will get to grips with classes and objects, along with their uses. In the concluding chapters, you will learn about the importance of inheritance and exceptions with practical examples. By the end of this book, you will have gained comprehensive knowledge of Java.
Table of Contents (17 chapters)
Title Page
Copyright and Credits
Packt Upsell

Importance of classes and objects in Java

Objects are instances or references of a class. So we can call the methods and variables present in this class with the help of their objects. We cannot call methods and objects directly, we can only use them with the help of their objects. So first, we need to create objects for the class, and then we can call the method inside the main class.

Let's take a look at the previous example to explain this:

package coreJavaTraining;

public class Firstclass {

    public void getData()
        System.out.println(" I am in method");
    public static void main(String[] args) 
        System.out.println("hello world");

Since the main block is already in the class, why do we need to create an object again for this class and call it?

The answer is that there is no way that the main block will come to know about the method outside it until and unless we create an object to call the method. There is an...