模块一：计算机屏幕英语 Computer Screen English,学习情境3：JDK提示信息,广东科贸 信息工程系 计算机专业英语课件,2,Key points：,JDK introduce Whats the JDK stand for? JDk environment variables configuration What is the difference between JRE and JDK ? Abbreviations about Java 构词法复合词,广东科贸 信息工程系 计算机专业英语课件,3,Part A: Introduction,JDK(Java Development Kit)是Sun Microsystems针对Java开发员的产品。自从Java推出以来，JDK已经成为使用最广泛的Java SDK。JDK 是整个Java的核心，包括了Java运行环境，Java工具和Java基础的类库。JDK是学好Java的第一步。而专门运行在x86平台的Jrocket在服务端运行效率也要比Sun JDK好很多。从SUN的JDK5.0开始,提供了泛型等非常实用的功能，其版本也不断更新，运行效率得到了非常大的提高。,广东科贸 信息工程系 计算机专业英语课件,4,JDK and JRE File Structure,This document gives an overview of the JDK directories and the files they contain. This page may also be used as a reference for the file structure of the JRE. To see the file structure of the Runtime Environment, just look at the description of the contents of the JDKs jre directory on this page. The file structure of the JRE is identical to that of the JDKs jre directory.,广东科贸 信息工程系 计算机专业英语课件,5,Development Files and Directories,This section describes the files and directories that are required to develop apps for the Java 2 Platform. (The directories that are not required include demos, source code, and C header files. They are discussed in the following section, Additional Files and Directories.) The following chart shows the most important directories:,广东科贸 信息工程系 计算机专业英语课件,6,Assuming the JDK software is installed at c:jdk1.5.0, here are some of the most important directories:,c:jdk1.5.0 The root directory of the JDK software installation. Contains copyright, license, and README files. Also contains src.zip, the archive of source code for the Java 2 platform.,c:jdk1.5.0bin The executable files for the development tools contained in the Java Development Kit. The PATH environment variable should contain an entry for this directory. For more information on the tools, see the JDK Tools.,广东科贸 信息工程系 计算机专业英语课件,7,JDK version,SE(J2SE): standard edition (标准版) 是我们通常用的一个版本，从JDK 5.0开始，改名为Java SE。,EE(J2EE): enterprise edition (企业版) 使用这种JDK开发J2EE应用程序，从JDK 5.0开始，改名为Java EE,ME(J2ME): micro edtion 主要用于移动设备、嵌入式设备上的java应用程序,从JDK 5.0开始，改名为Java ME。,广东科贸 信息工程系 计算机专业英语课件,8,Part B: Experimental JDK Tools and Utilities,NOTE - The tools described in this section are unsupported and experimental in nature and should be used with that in mind. They might not be available in future JDK versions.,广东科贸 信息工程系 计算机专业英语课件,9,Troubleshooting Documentation,NOTE - Some tools have separate reference pages for Windows, Linux and Solaris to accommodate minor differences in configuration and usage - for example, the character used to specify directory separators may be different.,J2SE 5.0 Trouble-Shooting and Diagnostic Guide,广东科贸 信息工程系 计算机专业英语课件,10,JRE and JDK,JDK (Java Development Toolkit) It is a bundle of software that you can use to develop Java based applications. Java Development Kit is needed for developing java applications. JDK needs more Disk space as it contains JRE along with various development tools JDK can be downloaded/supported freely fromjava.sun.com It includes JRE, set of API classes, Java compiler, Webstart and additional files needed to write Java applets and applications,JRE (Java Runtime environment) It is an implementation of the Java Virtual Machine* which actually executes Java programs. Java Run Time Environment is a plug-in needed for running java programs. JRE is smaller than JDK so it needs less Disk space. JRE can be downloaded /supported freely fromjava.com It includes JVM , Core libraries and other additional components to run applications and applets written in Java.,广东科贸 信息工程系 计算机专业英语课件,11,There are many commonly used standard tools of JDK,广东科贸 信息工程系 计算机专业英语课件,12,the basic components include,javac The compiler for the Java programming language.,.,jdb The Java Debugger. See JPDA for the debugger architecture specifications.,extcheck Utility to detect Jar conflicts.,jar Create and manage Java Archive (JAR) files.See Java Archive Files page for the JAR specification,API documentation generator. See Javadoc Tool page for doclet and taglet APIs.,JDK Contains,javadoc ,Javah： C header and stub generator. Used to write native methods.,Javap： Class file disassembler,.,appletviewer： Run and debug applets without a web browser,广东科贸 信息工程系 计算机专业英语课件,13,常用的package,java.lang： 这个是系统的基础类，比如String等都是这里面的，这个package是唯一一个可以不用import就可以使用的Package,java.io: 这里面是所有输入输出有关的类，比如文件 操作等,java.net: 这里面是与网络有关的类，比如URL,URLConnection等。,java.util : 这个是系统辅助类，特别是集合类Collection,List,Map等。,java.sql: 这个是数据库操作的类，Connection, Statement，ResultSet等,javax.servlet: 这个是JSP,Servlet等使用到的类,广东科贸 信息工程系 计算机专业英语课件,14,Part C: How to install JDK,一步一步教你配置JDK环境 1 2,广东科贸 信息工程系 计算机专业英语课件,15,JDK的一些其它用途,在股票中: jdk 在股票中为分析指标 游戏战队 JDKJ.D.Knight机动骑士战队建立于2005年10月，作为中国第一支帝国3战队，自始至终见证着帝国3的发展。如今的JDK已度过她四岁的生日，经过全队队员一千五百多个日日夜夜的不懈努力，JDK已发展为一支帝国3届极优秀的队伍。四年中我们经历了许许多多的荆棘与坎坷，风风雨雨中坚强的JDK战队辉煌依旧，所有的JDK队员发自内心地热爱着这个队伍，热爱着这个游戏，我们以极强的团队精神和集体荣誉感著称，更有着傲人的游戏水准，培养出了大批帝国3高手，有着帝国3新老玩家人人皆知的名字：_JDK_文婕、_JDK_908，_JDK_虚假伪，_JDK_Lung, _JDK_SSW,_JDK_8800,_JDK_风之子,_JDK_DUke等等。,