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iAbout the T utorialEclipse is an integrated development environment (IDE) for Java and other programming languages like C, C++, PHP, and Ruby etc. Development environment provided by Eclipse includes the Eclipse Java development tools (JDT) for Java, Eclipse CDT for C/C++, and Eclipse PDT for PHP, among others.This tutorial will teach you how to use Eclipse in your day-2-day life while developing any software project using Eclipse IDE. We will give special emphasis on Java project. AudienceThis tutorial has been prepared for beginners to help them understand basic functionality of Eclipse tool. After completing this tutorial, you will find yourself at a moderate level of expertise in using Eclipse IDE from where you can take yourself to next levels. PrerequisitesWe assume you are going to use Eclipse IDE to handle all levels of Java projects development. So it will be good if you have knowledge of software development using any programming language specially Java programming.Copyright & Disclaimer© Copyright 2015 by Tutorials Point (I) Pvt. Ltd.All the content and graphics published in this e-book are the property of Tutorials Point (I) Pvt. Ltd. The user of this e-book can retain a copy for future reference but commercial use of this data is not allowed. Distribution or republishing any content or a part of the content of this e-book in any manner is also not allowed without written consent of the publisher. We strive to update the contents of our website and tutorials as timely and as precisely as possible, however, the contents may contain inaccuracies or errors. Tutorials Point (I) Pvt. Ltd. provides no guarantee regarding the accuracy, timeliness or completeness of our website or its contents including this tutorial. If you discover any errors on our website or inthistutorial,******************************************iT able of ContentsAbout the Tutorial (i)Audience (i)Prerequisites (i)Copyright & Disclaimer (i)Table of Contents .................................................................................................................................... i i 1.OVERVIEW (1)What is Eclipse? (1)Licensing (1)Eclipse Releases (1)2.INSTALLATION (3)Downloading Eclipse (3)Installing Eclipse (3)Launching Eclipse (4)3.EXPLORE WINDOWS (5)Parts of an Eclipse Window (5)Using Multiple Windows (6)4.EXPLORE MENUS (7)Typical Eclipse Menus (7)Brief Description of Menus (8)Customizing Menus (8)5.EXPLORE VIEWS (9)About Views (9)Organizing Views (9)Moving Views (9)Creating View Folders (10)Opening a view (10)6.PERSPECTIVES (13)What is a Perspective? (13)Opening a Perspective (13)Switching between Perspectives (13)Closing a Perspective (14)Customizing a Perspective (14)7.WORKSPACES (16)About Eclipse Workspace (16)UI Elements for Managing the Workspace (16)8.CREATE JAVA PROJECT (18)Opening the New Java Project wizard (18)Using the New Java Project wizard (18)Viewing the Newly Created Project (20)9.CREATE JAVA PACKAGE (21)Opening the New Java Package wizard (21)Using the New Java Package Wizard (21)Viewing the Newly Created Package (22)10.CREATE JAVA CLASS (23)Opening the New Java Class Wizard (23)Using the New Java Class Wizard (23)Viewing the Newly Created Java class (24)11.CREATE JAVA INTERFACE (25)Opening the New Java Interface Wizard (25)Using the New Java Interface Wizard (25)Viewing the Newly Created Java Interface (26)12.CREATE XML FILE (27)Opening the New XML File wizard (27)Using the New XML File wizard (28)Viewing the Newly Created XML File (29)13.JAVA BUILD PATH (30)Setting the Java Build Path (30)14.RUN CONFIGURATION (31)Creating and Using a Run Configuration (31)15.RUNNING A PROGRAM (33)Running a Java Program (33)16.CREATE JAR FILES (35)Opening the Jar File wizard (35)Using the Jar File wizard (35)17.CLOSE PROJECT (37)Why Close a Project? (37)How to Close a Project? (37)Closed Project in Package Explorer (38)18.REOPEN PROJECT (39)Reopening a Closed Project (39)19.BUILD PROJECT (40)Building a Java Project (40)20.DEBUG CONFIGURATION (42)Creating and Using a Debug Configuration (42)21.DEBUGGING A PROGRAM (44)Debugging a Java Program (44)22.PREFERENCES (48)Setting Preferences (48)23.CONTENT ASSIST (50)Using Content Assist (50)24.QUICK FIX (52)Using Quix Fix (52)25.HOVER HELP (54)Using Hover Help (54)26.SEARCH MENU (56)Searching the Workspace (56)27.NAVIGATION (58)Navigating the Eclipse Workspace (58)Open Type (58)Open Type in Hierarchy (60)Open Resource (61)28.REFACTORING (63)Refactoring using Eclipse (63)29.ADD BOOKMARKS (64)About Bookmarks (64)Adding a Bookmark (64)Opening the Bookmarks View (64)Using the Bookmarks View (65)30.TASK MANAGEMENT (66)Managing Tasks (66)Opening the Tasks View (67)Using the Tasks View (67)31.INSTALL PLUGINS (69)Locating and Installing Plug-ins (69)32.CODE TEMPLATES (73)Using Code Templates (73)Modifying/Adding code templates (74)33.SHORTCUTS (75)About Shortcuts (75)34.RESTART OPTION (78)Restarting Eclipse (78)35.TIPS & TRICKS (79)36.WEB BROWSERS (81)Internal Web Browser (81)Eclipse 7What is Eclipse?In the context of computing, Eclipse is an integrated development environment (IDE) for developing applications using the Java programming language and other programming languages such as C/C++, Python, PERL, Ruby etc.The Eclipse platform which provides the foundation for the Eclipse IDE is composed of plug-ins and is designed to be extensible using additional plug-ins. Developed using Java, the Eclipse platform can be used to develop rich client applications, integrated development environments, and other tools. Eclipse can be used as an IDE for any programming language for which a plug-in is available.The Java Development Tools (JDT) project provides a plug-in that allows Eclipse to be used as a Java IDE, PyDev is a plugin that allows Eclipse to be used as a Python IDE, C/C++ Development Tools (CDT) is a plug-in that allows Eclipse to be used for developing application using C/C++, the Eclipse Scala plug-in allows Eclipse to be used an IDE to develop Scala applications and PHPeclipse is a plug-in to eclipse that provides complete development tool for PHP.LicensingEclipse platform and other plug-ins from the Eclipse foundation is released under the Eclipse Public License (EPL). EPL ensures that Eclipse is free to download and install. It also allows Eclipse to be modified and distributed.Eclipse ReleasesEvery year, since 2006, the Eclipse foundation releases the Eclipse Platform and a number of other plug-ins in June.1.Eclipse8Eclipse 9Downloading EclipseYou can download eclipse from /downloads/. The download page lists a number of flavors of eclipse.The capabilities of each packaging of eclipse are different. Java developers typically use Eclipse Classic or Eclipse IDE for developing Java applications.The drop down box in the right corner of the download page allows you to set the operating system on which eclipse is to be installed. You can choose between Windows, Linux and Mac. Eclipse is packaged as a zip file.Installing EclipseTo install on windows, you need a tool that can extract the contents of a zip file. For example you can use:∙7-zip ∙PeaZip ∙ IZArcUsing any one of these tools, extract the contents of the eclipse zip file to any folder of your choice.2.Launching EclipseOn the windows platform, if you extracted the contents of the zip file to c:\, then you can start eclipse by using c:\eclipse\eclipse.exeWhen eclipse starts up for the first time it prompts you for the location of the workspace folder. All your data will be stored in the workspace folder. You can accept the default or choose a new location.1011If you select "Use this as the default and do not ask again", this dialog box will not come up again. You can change this preference using the Workspaces Preference Page. See the Preference tutorialpage for more details.Eclipse 12Parts of an Eclipse WindowThe major visible parts of an eclipse window are:∙Views ∙Editors (all appear in one editor area) ∙Menu Bar ∙ ToolbarAn eclipse perspective is the name given to an initial collection and arrangement of views and an editor area. The default perspective is called java. An eclipse window can have multiple perspectives open in it but only one perspective can be active at any point of time. A user can switch between open perspectives or open a new perspective. A perspective controls what appears in some menus and tool bars.3.EclipseA perspective has only one editor area in which multiple editors can be open. The editor area is usually surrounded by multiple views. In general, editors are used to edit the project data and views are used to view the project metadata. For example, the package explorer shows the java files in the project and the java editor is used to edit a java file.The eclipse window can contain multiple editors and views but only one of them is active at any given point of time. The title bar of the active editor or view looks different from all the others.The UI elements on the menu bar and tool bar represent commands that can be triggered by an end user.Using Multiple WindowsMultiple Eclipse Windows can be open at the same time. To open a new window, click on the Windows menu and select the New Window menu item.Each window can have a different perspective open in them. For example you could open two Eclipse windows one in the Java perspective and the other in the Debug perspective. The window showing the Java perspective can be used for editing the java code and the window showing the debug perspective can be used for debugging the application being developed.13Eclipse 14T ypical Eclipse MenusThe typical menus available on the menu bar of an Eclipse window are:∙File menu ∙Edit menu ∙Navigate menu ∙Search menu ∙Project menu ∙Run menu ∙Window menu ∙ Help menu4.Plug-ins can add new menus and menu items. For example when the java editor is open, you will see the Source menu and when the XML editor is open, you will see the Design menu. Brief Description of Menus15Customizing MenusThe visible menu items on a menu depend on the installed plug-ins and customization done using the Customize Perspective dialog box.16Eclipse 17About ViewsEclipse views allow users to see a graphical representation of project metadata. For example the project navigator view presents a graphical representation of the folders and files associated with a project and properties view presents a graphical representation of an element selected in another view or editor.An eclipse perspective can show any number of views and editors. All editor instances appear in a single editor area, whereas views are placed inside view folders. A workbench window can display any number of view folders. Each view folder can display one or more views. Organizing ViewsThe following picture shows four views arranged in a view folder.The picture given below shows the same four views arranged in two view folders.5.Moving ViewsTo move a view from one view folder to another, just click on the view title and drag to the title bar area of another view folder. The green line shown below is a result of dragging the title bar of the Properties view from one view folder to the title bar area of another view folder. The Properties view can be moved to where the green line is by releasing the mouse button and sending out a drop event.Creating View FoldersView folders can be dynamically created by dragging the title bar of a view to anywhere outside the editor area and title bar of another view folder. As you drag the title bar around, green lines will indicate where exactly the new view folder will be created.Moving the drag icon to the bottom of a window allows you to create a view folder that spans the entire width of the window. Moving the drag icon to the left or right edge of window allows you to create a view folder that spans the entire height of the window.18Opening a viewTo open a view, click on the Window menu and select the Show View menu item.19Clicking on the Other menu item brings up the Show View dialog box that allows you to locate and activate a view.20The views are organized by category. To quickly locate a view, just type the name of a view into the filter text box. To open a view, select it and click on the OK button. The subsequent pages of this tutorial introduce you to a number of useful views.21End of ebook previewIf you liked what you saw…Buy it from our store @ https://22。
什么是EclipseEclipse是一个开放源代码的、与NetBeans、Sun ONE Studio和Borland Jbuilder类似的一种基于Java的整合型可扩展开发平台，也是目前最著名的开源项目之一，IBM在最近几年里也一直在大力支持该项目的发展，目标是将其做成用以替代IBM Visual Age for Java（简称IVJ）的下一代IDE开发环境，并于2001年11月宣布投入4千万美元资金到该项目的研发。
就其本身而言，它只是一个框架和一组服务，用于通过插件组件构建开发环境。
幸运的是，Eclips e 附带了一个标准的插件集，包括Java 开发工具（Java Development Tools，JDT）。
其未来的目标不仅仅是成为专门开发Java程序的IDE环境，根据Ecli pse的体系结构，通过开发插件，它能扩展到任何语言的开发，甚至能成为图片绘制的工具。
目前，Eclipse已经开始提供C语言开发的功能插件。
更难能可贵的是，Ec lipse是一个开放源代码的项目，任何人都可以下载Eclipse的源代码，并且在此基础上开发自己的功能插件。
也就是说未来只要有人需要，就会有建立在Eclip se之上的COBOL，Perl，Python等语言的开发插件出现。
同时可以通过开发新的插件扩展现有插件的功能，比如本系列文章为了进行手机应用程序的开发就是通过J2ME插件的扩展来加以实现的。
可以无限扩展，而且有着统一的外观，操作和系统资源管理，这也正是Eclipse的潜力所在。
Eclipse的主要组成Eclipse是一个开放源代码的软件开发项目，专注于为高度集成的工具开发提供一个全功能的、具有商业品质的工业平台。
它主要由Eclipse项目、Eclips e工具项目和Eclipse技术项目三个项目组成，具体包括四个部分组成--Eclipse Platform、JDT、CDT和PDE。
JDT支持Java开发、CDT支持C开发、PDE 用来支持插件开发，Eclipse Platform则是一个开放的可扩展IDE，提供了一个通用的开发平台。
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目录1简介 (1)1.1关于本手册 (1)1.2使用说明 (2)1.2.1预期的操作人员 (2)1.2.2患者人群 (2)1.2.3禁忌症 (2)1.3产品说明 (3)1.4警告 (4)1.5故障 (5)2开箱和安装 (6)2.1检查 (6)2.2标记 (7)2.3硬件安装 (8)2.3.1将病床 /椅子放在地上 (9)2.3.2Eclipse 后面板 (10)2.3.3Eclipse前部面板 (10)2.3.4前置放大器按钮 (11)2.4软件安装 (11)2.4.1安装前须知 (11)2.4.2计算机系统最低要求 (11)2.4.3所需材料： (12)2.4.4软件安装 (12)2.4.5驱动程序安装 (13)2.4.6恢复软件出厂默认设置 (13)2.4.7安装语言包 (13)2.5识读台 (15)2.6许可证 (15)2.6.1Eclipse序列号 (15)2.6.2DSP序列号和许可证密钥 (15)2.7从 OtoAccess® 数据库启动 (16)2.7.1OtoAccess® 数据库中的模块设置 (16)2.8从Noah启动（仅 ASSR 或 IA OAE Suite) (17)3EP15/EP25操作说明 (18)3.1记录标签 (19)3.1.1主菜单项 (19)3.1.2电子帮助 (20)3.1.3查看历史会话 (20)3.1.4协议选择 (20)3.1.5临时设置 (20)3.1.6重新排列曲线 (20)3.1.7波形分组 (20)3.1.8报告 (20)3.1.9打印 (21)3.1.10显示A-B曲线 (21)3.1.11显示对侧曲线 (21)3.1.12授话 (21)3.1.13单曲线显示 (21)3.1.14分屏显示 (22)3.1.15保存并新建 (22)3.1.16保存并退出 (22)3.1.17刺激率选择 (22)3.1.18频率选择 (23)3.1.19刺激窗口 (23)3.1.20手动刺激窗口 (23)3.1.21状态窗口 (23)3.1.22波形再现性 (24)3.1.23开始/停止 (24)3.1.24暂停 (24)3.1.25下一强度 (24)3.1.26Fmp与残留噪声曲线图 (24)3.1.27扫描数/平均数的扩展 (25)3.1.28原始EEG (25)3.1.29高级EEG (25)3.1.30隐藏刺激伪影 (26)3.1.31显示增益 (27)3.1.32记录窗口 (27)3.1.33选择波形 (27)3.1.34移动单条曲线 (27)3.1.35显示微分曲线 (27)3.1.36为波形增添一条注释 (28)3.1.37拒收监测 (29)3.1.38放置波形标记 (29)3.1.39删除波形标记 (29)3.1.40建议波形标记 (30)3.1.41标准化潜伏期数据 (30)3.1.42删除单条曲线 (30)3.1.43放大/缩小单条曲线 (30)3.1.44隐藏单条曲线 (31)3.1.45固定单条曲线/与历史会话进行比较 (31)3.1.46合并曲线（创建加总曲线） (31)3.1.47添加曲线 (32)3.1.48同侧减对侧差值（Ipsi-Contra）曲线 (32)3.1.49A减B差值（A-B（N））曲线 (32)3.1.50修改显示滤波 (33)3.1.51记录的曲线状况 (33)3.1.52向曲线添加备注 (33)3.1.53使用光标 (34)3.1.54信噪比计算（3:1） (34)3.1.55CR、RA和INC波形标记 (34)3.2潜伏期标签 (35)3.2.1潜伏期值 (35)3.2.2潜伏期间值 (35)3.2.3潜伏期曲线图 (36)3.2.4显示波峰至波谷标记（SN10标记）（仅EPx5软件） (37)3.3Windows® 8, 10 和 11 无法启动帮助 (37)3.4电脑快捷键 (38)3.5测试前患者准备 (39)3.5.1阻抗检查 (39)3.5.2换能器 (39)3.6进行ABR阈值记录 (40)3.6.1电极画面 (40)3.6.2ABR阈值刺激 (40)3.6.3编辑ABR阈值记录 (41)3.6.4使用ABR阈值结果说明 (41)3.7进行神经潜伏期记录 (42)3.7.1电极画面 (42)3.7.2编辑神经潜伏期记录 (42)3.8进行eABR记录 (44)3.8.1两个推荐eABR电极画面 (44)3.8.2编辑eABR记录 (44)3.8.3电气阈值估算（用于人工耳蜗安接） (45)3.9进行ECochG记录 (46)3.9.1ECochG 电极安装 (46)3.9.2编辑ECochG记录 (48)3.10进行CM记录 (49)针对患者的准备工作至关重要 (49)3.10.1CM电极画面 (49)3.10.2用于CM记录的刺激 (49)3.10.3CM记录示例 (49)3.10.4CM结果内差值 (49)3.11进行AMLR记录 (50)3.11.1电极画面AMLR示例 (50)3.11.2可用AMLR刺激 (50)3.11.3AMLR记录示例 (51)3.12进行ALR记录/皮层ERA (52)3.12.1ALR阈值记录的电极画面示例 (52)3.12.2刺激信号 (52)3.12.3ALR结果说明 (53)3.12.4电生理阈值估算和婴幼儿听力仪器安接 (53)3.13进行P300/MMN记录 (54)3.13.1P300/MMN电极画面示例 (54)3.13.2可用P300/MMN刺激 (54)3.13.3P300和MMN参数汇总表 (55)3.14性能/环回（LBK15）测试 (55)4VEMP操作说明 (56)4.1前置放大器设置 (56)4.2VEMP监示器 (56)4.3VEMP波形标记 (57)4.4计算VEMP不对称率（VEMP伙伴） (57)4.5VEMP比例设定 (58)4.6进行cVEMP记录 (58)4.6.1用于cVEMP的电极画面 (58)4.6.2用于cVEMP的刺激 (59)4.6.3默认收集参数 (59)4.6.4程序 (59)4.6.5编辑cVEMP结果 (59)4.6.6cVEMP结果示例 (60)4.6.7cVEMP结果示例 (60)4.7进行oVEMP记录 (61)4.7.1oVEMP电极画面 (61)4.7.2用于oVEMP的刺激 (61)4.7.3默认收集参数 (61)4.7.4程序 (62)4.7.5oVEMP结果示例 (62)5研究模块 (63)5.1.1记录每次扫描（以便以后进行“中继”） (63)5.1.2导出平均曲线和/或完整会话 (64)5.1.3导出会话（所有曲线） (65)5.1.4离线导出波形 (65)5.1.5导入用于刺激的波形文件 (65)6操作说明 (69)6.1耳塞的操作和选择 (69)6.2OAE 设备的日常系统检查 (70)6.2.1探头完整性测试 (70)6.2.2真耳检查 (71)7.IA OAE Suite (72)7.1PC 电源配置 (72)7.2兼容的设备 (72)7.2.1从 OtoAccess® 数据库启动 (72)7.2.2从 Noah 4 启动 (72)7.2.3模拟模式 (72)7.2.4崩溃报告 (73)7.3使用菜单 (74)7.4使用 DPOAE 探头 (75)7.4.1准备测试 (75)7.4.2DPOAE 模块中的元素 (77)7.5使用 TEOAE 模块 (83)7.5.1准备测试 (83)7.5.2TEOAE 模块中的元素 (85)7.6使用打印向导 (90)8.ABRIS操作说明 (92)8.1使用ABRIS模块 (92)8.2安装电极 (92)8.3阻抗检查 (92)8.4回路（LBK15）测试 (93)8.5ABRIS测试屏幕 (93)8.5.1主菜单项 (93)8.5.2查看历史会话 (94)8.5.3保存并退出 (94)8.5.4打印 (94)8.5.5电子帮助 (94)8.5.6报告 (94)8.5.7查看EEG或噪声条 (94)8.5.8刺激窗口 (94)8.5.9测试状态窗口 (95)8.5.10受试耳 (95)8.6进行ABRIS记录 (96)8.6.1开始与暂停测试 (96)8.6.2EEG曲线图 (96)8.6.3EEG噪声条 (96)8.6.4AEP波形 (96)8.6.5备注框 (96)8.6.6状态栏 (97)8.6.7ABRIS反应曲线 (97)8.7电脑快捷键 (98)8.8可拆卸零部件 (98)9.ASSR操作说明 (99)9.1使用ASSR模块 (99)9.2ASSR测试前准备 (99)9.3测试前准备 (99)9.3.1皮肤准备 (99)9.3.2放置电极 (100)9.3.3阻抗检查 (100)9.4安装电极 (101)9.5阻抗检查 (101)9.6系统性能/回路（LBK15）测试 (101)9.7ASSR标签 (102)9.7.1主菜单项 (102)9.7.2协议选择 (102)9.7.3临时设置 (103)9.7.4报告 (103)9.7.5打印 (103)9.7.6保存并退出 (103)9.7.7查看历史会话 (103)9.7.8刺激窗口 (103)9.7.9总会话状态窗口 (104)9.7.10刺激率 (104)9.8进行ASSR记录 (105)9.8.1开始/停止 (105)9.8.2暂停 (105)9.8.3原始EEG曲线图 (105)9.8.4测试频率曲线图 (105)9.8.5CM 检测器 (106)9.8.6ASSR表 (106)9.8.7延长测试时间 (107)9.8.8调整刺激强度 (107)9.8.9中止测试频率/强度 (108)9.8.10ASSR 遮蔽计算器 (108)9.9听力图标签 (110)9.9.1估计的听力图符号 (110)9.9.2NOAH 或 OtoAccess® 数据库中的听力符号 (111)9.9.3估算听力图 (112)9.9.4AC 和 BC 在同一听力图中 (113)9.9.5无反应 (114)9.9.6选定的校正系数 (114)9.9.7电脑快捷键 (114)10.维护 (115)10.1通用维护程序 (115)10.2如何清洁国际听力产品 (115)10.3清洁OAE探头尖 (116)10.4关于维修 (117)10.5保修 (117)11.技术规格 (119)11.1技术规格 - Eclipse硬件 (119)11.2EP15/EP25/VEMP技术规格 (120)11.2.1peSPL至nHL校正值 (122)11.3TEOAE25技术规格 (123)11.4DPOAE技术规格 (124)11.5ABRIS技术规格 (125)11.6ASSR技术规格 (126)11.7电磁兼容性（EMC） (127)11.8Eclipse软件模块概览 (132)11.8.1EP15/EP25/VEMP模块 (132)11.8.2P15/EP25/VEMP模块刺激最大强度 (133)11.8.3TEOAE25模块 (134)11.8.4DPOAE模块 (134)11.8.5ABRIS模块 (134)11.8.6ASSR模块 (134)1简介1.1 关于本手册本手册适用于EP15/25 v4.6软件版本、IA OAE套件1.2、ABRIS v1.6.3、VEMP v4.6和ASSR v 1.3。
1.Eclipse简介俗话说：工欲善其事，必先利其器，想要快速高效的开发，选择好的开发工具是非常重要的。
1.1 历史背景Eclipse 这样功能完整且成熟的开发环境，是由蓝色巨人IBM 所释出。
IBM 花了 4 千万美金来开发这个IDE(Integrated Development Environment)。
第一版 1.0 在2001 年11 月释出，随后逐渐受到欢迎。
Eclipse已经成为开放原始码计划(Open Source Project)，大部分的开发扔然掌握在IBM手中，但是有一部份由的软件联盟主导。
() Eclipse 项目由Project Management Committee(PMC)所管理，它综观项目全局，Eclipse 项目分成3 个子项目：∙ 平台-Platform∙ 开发工具箱-Java Development Toolkit(JDT)∙ 外挂开发环境-Plug-in Development Environment(PDE)这些子项目又细分成更多子项目。
例如Platform 子项目包含数各组件，如Compare、Help 与Search。
JDT 子项目包括三各组件：User Interface(UI)、核心(Core)及除错(Debug)。
PDE 子项目包含两各组件：UI 与Core。
1.2 开发原始码软件Eclipse 是开放原始码，结果很多人在使用的时候都不注重合法权的问题。
开放原始码软件让使用者能够取得软件的原始码，有权去修改和散布这个软件。
如果想修改软件，这件事的另一面就是，除非其它人对修改后的软件也有相同的权力，否则是不能散布修改后的软件，这种权利和著作权(copyright)相反，开放原始码项目中有时称之为著作义(copyleft)。
有些开放原始码许可书，坚持要求任何和其它开发原始码合组成的软件也必须是开放原始码。
然而，Eclipse 使用的开放原始码许可书：公共公众许可书-Common Public License(CPL)作为授权方式，设计上是可以容许商业利益的。
