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    Java for Beginners: A Crash Course to Learn Java Programming in 1 Week
    Java for Beginners: A Crash Course to Learn Java Programming in 1 Week
    Java for Beginners: A Crash Course to Learn Java Programming in 1 Week
    Ebook231 pages2 hours

    Java for Beginners: A Crash Course to Learn Java Programming in 1 Week

    By Brady Ellison

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    • Java Programming

    • Programming

    • Object-Oriented Programming

    • Java

    • Variables

    • Power of Knowledge

    • Mentor

    • Star-Crossed Lovers

    • Programmer's Journey

    • Love Triangle

    • Hero's Journey

    • Quest

    • Political Intrigue

    • Power of Community

    • Dark & Troubled Past

    • Data Types

    • Java Programming Language

    • Methods

    • Debugging

    • Arrays

    About this ebook

    Have you ever wanted to learn a programming language?

    Or do you have great ideas for apps but learning a programming language always seemed a daunting task?
    What if I tell you that it doesn't have to be that way?

    Java programming is used for many day-to-day applications and is one of the simplest programming languages to learn. You can get the basics down in only one week!
    This could be the start of a new adventure that can change your life. Knowing how to program Java can allow you to create everything that you always wanted to do. Your programming journey starts now!

    In this book you will learn:

    The basics of Java programming

    How to write programs

    What object-oriented languages are

    Why Java is the right programming language for you

    All the jargon you need in simple explanations

    How to apply Java programming in real-life situations

    Everything you need to get a Java basic certification


    Get your copy now!

    LanguageEnglish
    PublisherWhiteFlowerPublsihing
    Release dateMay 31, 2022
    ISBN9798201144234
    Java for Beginners: A Crash Course to Learn Java Programming in 1 Week

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      Book preview

      Java for Beginners - Brady Ellison

      Java for Beginners

      A Crash Course to Learn Java Programming in 1 Week

      Brady Ellison

      © Copyright 2022 - All rights reserved.

      The content contained within this book may not be reproduced, duplicated or transmitted without direct written permission from the author or the publisher.

      Under no circumstances will any blame or legal responsibility be held against the publisher, or author, for any damages, reparation, or monetary loss due to the information contained within this book, either directly or indirectly.

      Legal Notice:

      This book is copyright protected. It is only for personal use. You cannot amend, distribute, sell, use, quote or paraphrase any part, or the content within this book, without the consent of the author or publisher.

      Disclaimer Notice:

      Please note the information contained within this document is for educational and entertainment purposes only. All effort has been executed to present accurate, up to date, reliable, complete information. No warranties of any kind are declared or implied. Readers acknowledge that the author is not engaged in the rendering of legal, financial, medical or professional advice. The content within this book has been derived from various sources. Please consult a licensed professional before attempting any techniques outlined in this book.

      By reading this document, the reader agrees that under no circumstances is the author responsible for any losses, direct or indirect, that are incurred as a result of the use of the information contained within this document, including, but not limited to, errors, omissions, or inaccuracies.

      Table of Contents

      Introduction

      Chapter 1: Why Java?

      Object-Oriented Programming

      Execution in Multiple Operating Systems

      Automatic Memory Management

      Community Support

      Great Application Programming Interfaces

      The Documentation Support

      Security

      Multi-Thread

      Key Concepts

      Differences Between Classes and Objects

      Main () Method

      Comment

      Class

      Compiler

      Java Install

      On Windows

      On Macintosh

      Let’s Try It Out

      Chapter 2: Variables

      Declaring Variables

      Displaying Variables

      Data Types

      Integer Types

      Byte

      Short

      Ints

      Long

      Floating Point Types

      Float

      Doubles

      Scientific Numbers

      Booleans

      Char

      Non-Primitive Data Types

      String

      Static Checking

      Naming

      Type Casting

      Manipulating Variables: Operators

      Manipulating Variables: Addition and Subtraction

      Manipulating Variables: Multiplication and Division

      Manipulating Variables: Modulo

      Manipulating Variables: Compound Assignment Operators

      Manipulating Variables: Order of Operations

      Manipulation Variables: Greater Than and Less Than

      Manipulating Variables: Equals and Not Equals

      Manipulating Variables: Greater/ Less Than or Equal To

      Manipulating Variables: .equals() (very similar content to equals() in string methods)

      Manipulating Variables: String Concatenation

      Manipulating Variables: final Keyword

      Types of Variables

      Class Variables

      Local Variables

      Instance Variables

      Chapter 3: String Methods

      toString() method

      length()

      concat()

      equals() & .compareTo()

      indexOf()

      charAt()

      substring()

      toUpperCase() & toLowerCase()

      Chapter 4: Arrays

      Creating an Array

      Empty Arrays

      String[] args

      ArrayList

      Chapter 5: Operators

      Recap Methods

      Conditional Operators

      Conditional—And: &&

      Logical Not: !

      How Do We Combine Conditional Operators

      Chapter 6: Statements

      Conditional Statements

      The If Statement

      The Else Statement

      The Else If Statement

      The Switch Statements

      Chapter 7: Classes

      Creating a Class

      Creating an Object

      Multiple Classes

      Syntax

      Constructors

      Instance Fields

      Constructor Parameters

      Assigning Values to Instance Fields

      Multiple Fields

      Methods

      Parameters and Arguments

      Multiple Parameters

      Method Overloading

      Java Math

      Math.max()

      Math.min()

      Math.sqrt()

      Math.abs()

      Math.random()

      Java Packages & API

      Built-in Packages

      User-Defined/Third-Party Packages

      Abstract Classes and Methods

      Java Enums

      Java User Input

      Java Dates

      Java HashMap

      Java HashSet

      Java Wrapper Classes

      Java Regular Expressions

      Chapter 8: Static Methods and Static Variables

      Recap Methods

      Static Variables

      Modifying Static Variables

      Writing Your Static Methods

      Chapter 9: Inheritance and Polymorphism

      Chapter 10: Loops

      While Loops

      Do/ While Loops

      Counter Variables

      For Loops

      Looping Over ArrayLists and Arrays

      For-Each Loops

      Chapter 11: Access and Scope

      Access

      public Keyword

      private Keyword

      Scope

      this Keyword

      Chapter 12: Debugging

      Syntax Errors

      Run-Time Errors

      Logic Errors

      Debugging Techniques

      Print Statement Method

      Dividing Your Program

      Chapter 13: Java Files

      File Management

      Create a File

      Writing a File

      Reading a File

      Deleting a File

      Chapter 14: FAQ

      Conclusion

      References

      Introduction

      When Java programming started to come to light, it was first called oak, back in June of 1991. It was created by programmer James Gosling and some of his colleagues at Sun Microsystems with the goal of incorporating a language that had roots in C-like notations but was simpler than those types of programming languages. Java programming, in fact, has many of the same syntax programming languages like C/C++ have, but with a simpler way of processing and writing.

      In 1995, Java 1.0 was released to the public with a peculiar promise that held to this day almost intact: Write once, run anywhere. It was such a success that soon the main web browsers at the time started to use them in their regular configurations. As it continued to expand in popularity, Java 2.0 was released and it was designed for both smaller and larger platforms. And so, with more versatility than its predecessor.

      Even though Java might be seen as an easier programming language, it has tremendous depth and can be used in numerous applications in our society. In fact, there are more than three billion devices today running Java. It’s used for many applications, and many times we are interacting with Java programming and we don’t even know. Some of its more important applications are:

      ●  Video Games

      ●  Web Servers

      ●  Web Applications

      ●  Mobile and Desktop Applications

      ●  And even connections between Databases, etc.

      In this book, we will cover everything that is necessary for you to write Java code and become proficient in only one week. Although you might be able to get the basics covered, it is important that you continue to practice to become better at it and more fluent. Think of it as learning an actual language where you have many verbs, names, pronouns, and more. Practice is essential for you to expand your vocabulary and to speak the language properly. Continuous and rigorous training will certainly make a difference when you are learning Java.

      Also, note that some of the concepts presented in this book might look daunting, but we can try to break it down into smaller bits of information to help you understand the different concepts. At the end of the day, everything comes down to logic and practice. The more you practice the better you will get.

      Chapter 1: Why Java?

      But why choose Java programming before any other programming languages? What makes Java so appealing for many programmers?

      Java programming is one of the most versatile and popular programming languages there is. As we have seen, its applications range from large systems developments to mobile applications and other software. It is a general-purpose language, and as such, you are able to apply it almost anywhere.

      One of the things that make Java programming so great is the fact that you can write Java code in one platform, or operating system and move it and run it in another without making any modifications. But here are some of the main reasons to choose Java programming:

      ●  Object-oriented programming

      ●  Open-source

      ●  Excellent community support

      ●  Versatile

      ●  Usable in different operating systems

      ●  Great documentation support

      ●  Rich in APIs

      ●  Contains built-in support, so it’s easier to use on other computer networks

      ●  Able to run and execute codes remotely

      Object-Oriented Programming

      There are many ways to interpret an object-oriented programming language (OO), depending on the language itself. With Java, the main component for this affirmation is the ability to combine both code and data into entities called objects.

      With this, Java separates the code from the data or separates things that change from things that do not change. This is to help stabilize large projects that might otherwise reduce in quality if this wasn’t implemented. Basically, it’s a way to simplify large and complicated projects.

      Another great use for OO languages is that objects can become more generic and so be used in different projects even without writing them again. This helps build large projects faster by reusing objects that would otherwise take longer to write. Other features of Java’s OO are:

      ●  Has a clear structure, easier for programmers to understand

      ●  Aids in maintaining the code accessible by using DRY (don’t repeat yourself)

      ●  Reuse of applications with less time to create them

      Execution in Multiple Operating Systems

      This is a great feature of Java programming as it allows any code written in Java to easily run on another operating system. This is done by compiling specific Java bytecode that can be considered halfway written and allow a smooth transition when run on other operating systems. There are certain implementations of compilers that compile to native object code, allowing the removal of a middle bytecode stage.

      Automatic Memory Management

      This feature allows programmers to avoid having to perform manual memory management, something that in some programming languages is quite common. The issue with this is that, if the programmer forgets or doesn’t do it on time, a memory leak can happen. When this happens the program will consume an unnecessary amount of memory. It can also happen that the memory is allocated twice and this can lead the program to crash.

      Community Support

      Because of its open-source feature, Java offers great community support that acts quickly when an issue arises. Usually, the community is very open and accepts anyone depending on their skill, plus they tend to bundle

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