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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