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Java

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Java 1990 12 (Sun) Green Team Oak Oak( ) Java 1995 Sun Java Java Write once, run anywhere

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.. ..

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Java Compiler: (bytecode) 10101110100.. This is a test Interpreter: Java (Java Virtual Machine) compilerInterpreter Bytecode ACCDEBCC

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Java Compiler: Interpreter: Bytecode Source Code

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Java: .. .. compiler Bytecode ACCDEBCC JVM

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Java Development Kit (JDK) : JDK 1.0a2 Java 2 SDK Java J2SE (Standard Edition) (SDK, Development Tools) JRE (Java Runtime Environment) Web (Java Plug-in) J2EE (Enterprise Edition) J2ME (Micro Edition) /

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Java Development Kit (JDK) java.sun.com

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C:\program files\

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Java Hello world public class hello{ public static void main (String[] argv){ System.out.println("Hello world.."); } } hello.java javac hello.java ( ) hello.class java hello ( )

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demo

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Java Server Page

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WWW - WWW WWW World Wide Web 3W

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WWW - WWW WWW Server Client A A

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( Script) HTML URL URL Uniform Resource Locator Internet Interne t http://tw.yahoo.com/index.html

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WWW - HTML .htm HTML HyperText Makeup Language HTML HTML hello world hello world

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HTML Html This is a test hello word

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( Script) -

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HTML HTML

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( Script) JavaScript VBScript Java Applet URL JavaScript Netscape 1995 VBScript Microsoft

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