Java Security Training

History of Java

• Java released by Sun Microsystems in 1996
• Immediately gained popularity due to Java Applets
• Java 2 (version 1.2) featuring Enterprise Edition (EE) released in 1998
• Java EE still in widespread use in web platforms

Java Is Multipurpose

• Java SE (Standard Edition) can be applied to standalone console and GUI apps
• Java EE can be employed to implement server-based web applications and web services
• Java ME (Mobile Edition) can serve as a programming paradigm for Android apps

Sample Uses of Java

• Web development (JSF, Spring, Struts)
• Web Services (RESTful, to a lesser extent SOAP)
• Enterprise Components (Enterprise JavaBeans)
• Java as IoT (Internet of Things) provides a "seamless platform that runs from device to data center" according to Oracle (Oracle Technical Network, June 2014)

Java Difficulty Level

• High-level programming language
  • Like C#, Objective-C, PHP, and JavaScript
• Java is human readable
• Java procedural statements based on C
• Commonly used in programming courses

Learning Java

• Experienced programmers can get up to speed with the basic syntax
• Great language for object-oriented programming too
• Comprehensive API documentation
• New learners should learn Java 8

Java: The Good

• Relatively straightforward to learn
• Cross-platform
• Excellent Core API documentation
• Great Oracle support

Java: The Bad

• Object-oriented programming style in Java can be challenging to learn

Java: The Future

• Continues to grow
• Continued support from frameworks like Spring
• Language additions (e.g., functional programming) embrace proven development paradigms
• Continued ease of development in developer-friendly tools like Eclipse and IntelliJ

Syntax

• Statements and semicolons
• Curly brackets denote scope
• Case sensitive
• By convention
  • Lowercase variables and method names
  • UpperCamelCase class names

Declaring Variables

String foo = "Hello, world";
int bar = 5;
double fooBar = 4.9;

Comments

//Single-line comments follow two forward slashes

/*
This is a 
	multi-line comment.
*/

Common Data Types: Strings and Characters

String a = "foo";

char b = 'b';

Common Data Types: Integers and Floats

int year = 2017;

double weight = 4.9;

Common Data Types: Booleans

boolean cool = true;

boolean dead = false;

Common Data Types: Arrays

String[] fruit = {"apple", "plum", "pear"};

Conditions

if (someThing || otherThing) {
	runFast();
}
else if (thisThing && thatThing) {
    walkSlow();
}
else {
	eatTurkey();
}

Loops

while (someThing || otherThing) {
	keepDoingThis();
	if (exhausted) {
	break;
	}
}

for (grade : grades) {
	print(grade);
}

Methods

static void say(String word, int n) {
	for (int i=0; i<n; i++) {
	System.out.println(word);
	}
}

say("Hello", 5); //say hello five times

Keep Learning Java

With a Webucator Java Class

“I have taken trainings in the past at local training schools that have instructors that were clearly not passionate about what they are teaching. Roger was very clearly knowledgeable about Java and had no trouble explaining terms or concepts that up until this training I had never heard of. I would definitely recommend this training to friends and co-workers.”