Book Image

Java Programming for Beginners

By : Mark Lassoff
Book Image

Java Programming for Beginners

By: Mark Lassoff

Overview of this book

Java is an object-oriented programming language, and is one of the most widely accepted languages because of its design and programming features, particularly in its promise that you can write a program once and run it anywhere. Java Programming for Beginners is an excellent introduction to the world of Java programming, taking you through the basics of Java syntax and the complexities of object-oriented programming. You'll gain a full understanding of Java SE programming and will be able to write Java programs with graphical user interfaces that run on PC, Mac, or Linux machines. This book is full of informative and entertaining content, challenging exercises, and dozens of code examples you can run and learn from. By reading this book, you’ll move from understanding the data types in Java, through loops and conditionals, and on to functions, classes, and file handling. The book finishes with a look at GUI development and training on how to work with XML. The book takes an efficient route through the Java landscape, covering all of the core topics that a Java developer needs. Whether you’re an absolute beginner to programming, or a seasoned programmer approaching an object-oriented language for the first time, Java Programming for Beginners delivers the focused training you need to become a Java developer.
Table of Contents (12 chapters)

Switch, case, and break

In this section, we're going to take a look at the switch statement, which is another way that we can modify the control flow of our program.

To begin, let's create a new project in NetBeans. At my end at least, I'm going to get rid of all these comments. To demonstrate the power of the switch statement, we're going to start by writing a program using only if blocks, then we'll convert the program to one that uses switch statements. The following are the steps for the program that uses only if blocks:

  1. To begin, let's simply declare a variable x, (int x =1;), and here is our goal: If the value of x is 1, 2, or 3, we'd like to print out the responses RED, BLUE, or GREEN, respectively. If x is not one of those numbers, we'll just print out a default response.
  1. Doing this with if blocks is pretty straightforward, if...