Amazing Java: Learn Java Quickly
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About this ebook
AMAZING JAVA: LEARN JAVA QUICKLY
Do you know Java is being used worldwide? These days it is difficult to find a platform not running on Java. Their uses begin from commercial e-commerce website to Android apps, from desktop applications to games, from financial applications to scientific applications, from J2ME applications to open source library and much more.
No doubts its wide usage is due to the great benefits its users achieve from it.
Some of these benefits are:
•Write once and run anywhere- it reduces the stress of writing the same program everywhere that supports the Java platform
•You can download codes that are not trusted over a network and run it in an environment that is secure without any harm. This makes it a unique platform
•Java is reliable and multithreaded giving you the ability to perform a lot of tasks at the same time within a program
•Java is easy to learn and object oriented. This allows you to create modular applications that are maintainable and also codes that are reusable.
The support of Java is becoming universal as it is being integrated into almost all key operation systems, popular web browsers and electronic devices of customers.
With its wide usage and benefits, you can see that Java is amazing. Learning Java might save your future as you would be able to make a living with it due to its high demand for worldwide internet solution. Are you interested in Java and wondering how to learn it? You don’t need to worry about that as our read book is ready to help fill in the gap and provide you a solution. With our powerful short read book, you can learn Java quickly, improve, and become perfect.
Our incredible book offers lots of advantages if you are ready to read it without omitting a line. Some of these advantages are:
•A proven and ultimate guide for beginners on how to use and write Java programs. It will be of help before, during and after your classes.
•Every instructions and step in the book are convenient to follow and easy to learn
•It has a good and winning navigation index so it can be used as a reference guide.
•The book offers a clear and understandable explanation of all complex Java functions
•You will have the chance to learn Java as fast as possible and become a hot cake in the technology world
•Reading it saves time giving you the chance to put what you have read into practice.
Above are just tips of an iceberg when talking about the benefits our short book has to offer. Additionally, we offer a free DOWNLOADABLE JAVA FILE WITH EXAMPLES as a bonus.
You don’t need to spend all the money on you before getting this book. It is affordable and suitable for all budgets. No doubt, the result you will get from this book is worth more than its price.
We admit the fact that this incredible and powerful book might not contain all extensive information about Java. Our goal is to make sure you learn Java as quickly as you can without going through much stress.
The more you delay purchasing and making use of the information in this book the more your level of ignorance about Java increases. Why not choose a winning side when you can.
To learn Java quickly and become a Java programmer, click the buy button on the upper right side of the page and obtain your copy of the book in just one click!
Note: Each day you delay buying this product the more your level of ignorance about Java increases and the more you lose the chance of fitting into the technology world. Purchase this product now!
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Book preview
Amazing Java - Andrei Besedin
Chapter 1. Primitive Types
Primitive types are most basic data types that are used in Java. They are stored in variables. Variable is nothing but reserved memory. Size of memory depends of primitive type. All primitive types have their default value. Sizes are:
Declaration and initialization of primitive types
inta;
inta = 1;
inta,b;
inta = 2; intb = 2;
finalinta = 15;//constant
Declaration means to give variable type along with name: inta; So, our variable is type of integer and have name a;Initialization is process of adding value to primitive type, in this case: inta = 0; Before this int have default value. For boolean default value is false, for char is '\u0000', for rest is zero (0).
Conversation of primitive types
Implicit
inta = 1;
doubleb;
b = a;
Explicit
longa = 4l;
intb = a;//mistake
intc = (int)a;
Note: This is called cast operator. Operators will be covered next.
Operators
Arithmetic Operators
Main operators are: +, -, *, /, %
y = 5; Operator Result
x = y + 1 y = 6
x = y – 1 y = 4
x = y % 2 y = 1
x = ++y x = 6; y = 6
x = y++ x = 5; y = 6
x = --y x = 4; y = 4
x = 6
y = 3 Operator Same as Result
x = y x = 3
x + = y x = x + y x = 9
x - = y x = x – y x = 3
x * = y x = x * y x = 18
x / = y x = x / y x = 2
x % = y x = x % y x = 0
Relational Operators
Main operators are: <, >, <=, >=, ==, !=
x = 3
y = 2 Operator Result
x < y false
x > y true
x <= y false
x >= y true
x == y false
x != y true
Arithmetic operators are commonly used, as you guess, in math operations. Modulo (%) can be used to check if number is even or odd for example. Relational operators are very simple. ==and !=are common used for comparisons. Operator + can be used to concatenate two Strings also.
Logical Operators
Logical operators
Main operators are: && (logical AND), || (logical OR), ! (logicalNOT)
&&false true || false true!
falsefalse falsefalse falsetruefalsetrue
true false true true true truetruefalse
x = 2
y = 4 Operator Result
((x< 1) && (y > 3)) false
((x< 5) || (y = 5)) true
!(x > y) true