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
Contributors
Preface
Index

The Map collection


We have one more collection, called Map. We will take an example and discuss Map as we proceed with the code. This interface takes the values in the form of a key and value pair. 

We create a class, hashMapexample, and within that the we define HashMap. HashMap requires two types of argument, such as Integer and String:

package coreJava;

import java.util.HashMap;

public class hashMapexample {

    public static void main(String[] args) {

       HashMap<Integer, String> hm= new HashSet<Integer, String>();

    }
}

Here, Integer is the key and String is the value. Now if you type hm. in your IDE, you will see a few methods present in HashMap; let's use the put method:

        hm.put(0, "hello");
        hm.put(1, "goodbye");
        hm.put(2, "morning");
        hm.put(3, "evening");

The put method takes the input in the form of keys and values. Also, the value of the key needs to be an integer, it can be a string as well. The key is just something we define for...