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

Difference between strings and variables


In Chapter 1, First Programming Steps in Java, we printed a string and the variable. If we look closely, when we print a variable we are not using double quotes, but when we print a string, we are using them. This is because the value is already present in the variable, hence we need not use any double quotes. If we use them, Java considers it to be a string and the output will be printed as the letter a in the following example. If we run this and observe the output, the letter a will be printed as shown in the following screenshot:

Output displaying the value of a as per the code

If we don't use double quotes, Java will check whether there is any variable defined with this letter. If so, it prints the value present in that variable. If there is no variable defined, then it gives an error. If we comment out the variable declaration, what we see is an error. Hovering the mouse over the variable, we will get a prompt saying Create a local variable 'a...