java語言程序設計(java語言概述)ppt-wenkub.com
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【正文】 .” 2. Windows NT/2021，控制面板 ?系統(tǒng) ?高級 ?環(huán)境變量，添加 classpath選項添加“ .”，表示在當前目錄尋找 class文件 注 : the bootstrap classes (the RunTime classes that prise the Java platform39。 public class HelloWorld extends Applet { public void paint(Graphics g) { (Hello world!, 50, 25)。 import 。 public class HelloWorld extends Applet { public void paint(Graphics g) { (Hello world!, 50, 25)。 } } 所有的 Java類默認都引入 .* 簡單的 Java應用程序 36 ? 書寫規(guī)范 1. 花括號對“ {}”－類，方法 2. 語句分號“ 。 public class HelloWorld1 { public static void main(String[] args) { (“This is a Java Application Program.”)。s Java Card technology 5. Nov 5, Sun works with Linux Community on Java 2 software port to Linux 6. Dec 8, Java 2 platform ships 13 Java的發(fā)展 ? 五年回顧 (1996－ 2021) ? 1999年 1. Jan 13, Major consumer electronics manufacturers support Java technology for digital television 2. Feb 24, Java 2 platform source code released 3. Mar 4, XML support for Java platform unveiled 4. Mar 27, Java HotSpot performance engine unveiled 5. June 2, JavaServer Pages technology unveiled 6. June 15, JavaOne developer conference draws 20,000 7. June 15, Sun announces three editions of Java platform: J2SE, J2EE, J2ME 8. June 29, J2EE Reference Implementation Alpha ships 9. Aug 25, J2SE version beta software released 10. Aug, The JavaPhone API specification included in an approved GSM standard by the European Telemunications Standards Institute 14 Java的發(fā)展 ? 五年回顧 (1996－ 2021) ? 1999年 11. Sep 30, J2EE beta software released 12. Dec 8, J2EE platform ships 13. Dec 8, J2SE platform on Linux ships ? 2021年 1. Apr 19, J2EE platform licensed to Art Technology Group, BEA Systems, Compaq, Hitachi, SilverStream, Sybase, .. 2. May, Membership in Java Developer Connection program tops million 3. May 8, Sun to work with Chinese TV industry to define interactive digital TV spec for China TV 4. May 8, J2SE v. platform released 5. May 17, J2SE v platform gains industry support from Apple with Mac OS X 15 第一章 Java語言概述 1. Java的發(fā)展 2. 什么是 Java? 3. Java程序介紹 4. Java程序運行環(huán)境 16 什么是 Java? ? Java Technology 1. 編程語言 (Programming Language) 2. 運行平臺 (Platform) 17 什么是 Java? ? Java編程語言的特點 1. 簡單 (Simple) 2. 面向對象 (Object oriented) 3. 解釋性 (Interpreted) 4. 平臺獨立和可移植 (Architecture neutral amp。s portal to the Inter. 7 Java的發(fā)展 ? 歷史記錄 Who James Gosling: Green Team original, FirstPerson employee, original member Java Products Group, lead engineer and key architect of Java technology Bill Joy: Cofounder and vice president, Sun Microsystems, Inc., principal designer of the University of California, Berkeley, version of the UNIX
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