solicd.blogg.se - Java tutorial

Unfortunately, it's usually not very friendly for humans to read or write. This means if you and I both have systems with Java installed and even if our systems are not normally identical-for example, I'm on a Windows machine and you're on a Mac-a Java program on my machine that I give to you will still run essentially the same on your machine without the need for it to be recompiled.Ĭompiling a programming language such as Java is the act of taking the human-readable code that we've written and converting it into an interpreted machine-friendly code. Platform-independent: Lastly, Java was designed with the intention that it be a write once, run anywhere language.A firm grasp of object-oriented concepts is absolutely essential for any modern software developer. While we won't get into the specifics of objects and classes until a bit later in this book, know for now that objects allow us to define modular entities within our program that make them much more human-readable and much more manageable to create large-scale software projects. Object-oriented: Java is also what we call an object-oriented language.

Because it's not really feasible, or even desirable, for every computer system to have its own specialized programming language, the vast majority of the code is written in high-level, general-purpose languages such as Java.

High level and general purpose: Rather than being created to accomplish one very specific task, Java allows us to write computer-readable instructions in an open-ended environment.

So what exactly is Java? Java is a high-level, general-purpose object-oriented programming language. Java was developed by Sun Microsystems in 1995, but it has stood the test of time and remains highly relevant and widely used to this day. Specifically, we'll cover the following topics: Lastly, we'll look at what to do when we get an error. Once we accomplish this, we'll write our very first Java program and run it. We'll then follow a step-by-step process to set up a development environment to enable us to write and execute Java programs. In this chapter, we'll understand what Java is and also look at its features. We're going to move quickly, and we're not going to shy away from heavy subjects however, we're going to begin this book from the very ground up and learn about the concepts behind object-oriented programming as we go.

Whether this is your first foray into high-level object-oriented programming languages, such as Java, or if you've been programming for some time and you're just looking to add Java to your repertoire, or even if you've never touched a line of code in your life, this book is designed to accommodate you. 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. The book takes an efficient route through the Java landscape, covering all of the core topics that a Java developer needs. The book finishes with a look at GUI development and training on how to work with XML. This book is full of informative and entertaining content, challenging exercises, and dozens of code examples you can run and learn from.īy 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. 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. 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. 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.