Введение в JAVA

Java

Java – язык программирования:

• объектно-ориентированный

• кроссплатформенный

• строго-типизированный

Применение

• 1.1 billion desktops run Java• 930 million Java Runtime Environment downloads each year• 3 billion mobile phones run Java• 31 times more Java phones ship every year than Apple and

Android combined• 100% of all Blu-ray players run Java• 1.4 billion Java Cards are manufactured each year• set-top boxes, printers, games, car navigation systems, ATMs,

lottery terminals, medical devices, parking payment stations and more

http://www.java.com/en/about/

Семейства Java

• Java SE – Java Standard Edition

• Java EE – Java Enterprise Edition

• Java ME – Java Micro Edition

• Java FX

• Java Card

Особенности

• JVM – Java Virtual Machine

• JRE – Java Runtime Environment

• JDK – Java Development Kit

IDE

• Eclipse

• NetBeans

• IntelliJ IDEA

Hello, world!

public class HelloWorld { public static void main(String[] args) {

System.out.println("Hello, world!");

}}

Hello, world!

$ javac HelloWorld.java $ java HelloWorldHello, world!$

Javadocpackage com.my.helloworld;/** * Class prints "Hello, world!" to standard output * * @author Max T. */public class HelloWorld { /* * Main method (entry point for application) */ public static void main(String[] args) { // Prints "Hello, world!" string System.out.println("Hello, world!"); }}

Q&A