第01章-Java语言概述75039.pptVIP

第一章 Java语言概述 Java的发展 什么是Java? Java程序介绍 Java程序运行环境 Java的发展 早期的历史 1991年，Sun Microsystems公司建立“the Green Project”(Secretly)，13个成员，目的开发消费电子类产品市场(嵌入式设备)，初始选择C++语言 1992年夏天，*7设备，运行在一种全新的、对立于处理器的语言?“Oak”，潜在的市场?有线电视 Green Team?FirstPerson Team(70人)，电视机顶盒/video-on-demand，市场不成熟 ? ? ? ? James Gosling, Bill Joy, and Eric Schmidt … ? “why not the Internet? 在Mosaic浏览器的基础上开发“WebRunner”，“Hollywood-meets-Silicon-Valley”的两个演示(3D动态分子、线排序) Java的发展 早期的历史 Java面世 1995年3月，“1.0a” 7/8份二进制拷贝，“1.0a2”源代码公布在Internet 下载数量和反馈邮件剧增 On May 23, 1995, John Gage, director of the Science Office for Sun Microsystems, and Marc Andreessen, cofounder and executive vice president at NetscapeTM, stepped onto a stage and announced to the SunWorld audience that JavaTM technology was real, it was official, and it was going to be incorporated into Netscape NavigatorTM, the worlds portal to the Internet. Java的发展 历史记录 - Who Java的发展 历史记录 Java的发展 Java的发展 五年回顾(1996－2000) 1995年 May 23, Java technology launched 1996年 Jan 23, JDK 1.0 software release May 29, first JavaOne developer conference (JavaBeans, Java Media APIs, servlets, etc) July 10, 50,000 people attend Sun Java Day in Tokyo Aug 16, Sun/Addison-Wesley (The Java Tutorial and the first Java Language Specification) Sep, 83,000 Web pages have incorporated Java technology Oct 25, Sun announces first Just-In-Time (JIT) compiler for Java platform Oct 29, Java Card API announced Dec 9, JDK 1.1 beta software released Java的发展 五年回顾(1996－2000) 1997年 Feb 18, JDK 1.1 release ships Mar 4, Java Web Server beta and Java Servlet Developers Kit software released Mar 10, Java Naming and Directory Interface (JNDI) API introduced Mar 11, More than 220,000 downloads of JDK 1.1 software in just three weeks Apr 2, JavaOne conference (10,000 attendees, the worlds largest developer conference), Enterprise JavaBeans technology Aug 5, Java Media and Communication APIs released Aug 5, More than 100,000 downloads of JavaBeans Development Kit software Sep 23, Java Developer Connection progr