我们知道Java中有三种注释语句： 1.//用于单行注释。 2./*...*/用于多行注释，从/*开始，到*/结束，不能嵌套。 3./**...*/则是为支持jdk工具javadoc.exe而特有的注释语句。 javadoc工具能从java源文件中读取第三种注释，并能识别注释中用@标识的一些特殊变量（见表），制作成Html格式的类说明文档。 javadoc不但能对一个java源文件生成注释文档，而且能对目录和包生成交叉链接的html格式的类说明文档，十分方便。 注释中可以出现的关键字，以@开头： @author 作者名 @version 版本标识 @parameter 参数名及其意义 @since 最早出现的JDK版本 @return 返回值 @throws 异常类及抛出条件 @deprecated 引起不推荐使用的警告 @see 交叉参考 下面是javadoc.exe的用法 C:java>javadoc -help C:java>javadoc -help usage: javadoc [options] [packagenames] [sourcefiles] [classnames] [@files] -overview <file> Read overview documentation from HTML file -public Show only public classes and members -protected Show protected/public classes and members (default) -package Show package/protected/public classes and members -private Show all classes and members -help Display command line options and exit -doclet <class> Generate output via alternate doclet -docletpath <path> Specify where to find doclet class files -sourcepath <pathlist> Specify where to find source files -classpath <pathlist> Specify where to find user class files -exclude <pkglist> Specify a list of packages to exclude -subpackages <subpkglist> Specify subpackages to recursively load -breakiterator Compute 1st sentence with BreakIterator -bootclasspath <pathlist> Override location of class files loaded by the bootstrap class loader -source <release> Provide source compatibility with specified release -extdirs <dirlist> Override location of installed extensions -verbose Output messages about what Javadoc is doing -locale <name> Locale to be used, e.g. en_US or en_US_WIN -encoding <name> Source file encoding name -J<flag> Pass <flag> directly to the runtime system Provided by Standard doclet: -d <directory> Destination directory for output files -use Create class and package usage pages -version Include @version paragraphs -author Include @author paragraphs -docfilessubdirs Recursively copy doc-file subdirectories -splitindex Split index into one file per letter -windowtitle <text> Browser window title for the documenation -doctitle <html-code> Include title for the overview page -header <html-code> Include header text for each page -footer <html-code> Include footer text for each page -bottom <html-code> Include bottom text for each page -link <url> Create links to javadoc output at <url> -linkoffline <url> <url2> Link to docs at <url> using package list at <url2> -excludedocfilessubdir <name1>:.. Exclude any doc-files subdirectories with given name. -group <name> <p1>:<p2>.. Group specified packages together in overviewpage -nocomment Supress description and tags, generate only declarations. -nodeprecated Do not include @deprecated information -noqualifier <name1>:<name2>:... Exclude the list of qualifiers from the output. -nosince Do not include @since information -nodeprecatedlist Do not generate deprecated list -notree Do not generate class hierarchy -noindex Do not generate index -nohelp Do not generate help link -nonavbar Do not generate navigation bar -quiet Do not display status messages to screen -serialwarn Generate warning about @serial tag -tag <name>:<locations>:<header> Specify single argument custom tags -taglet The fully qualified name of Taglet to register -tagletpath The path to Taglets -charset <charset> Charset for cross-platform viewing of generated documentation. -helpfile <file> Include file that help link links to -linksource Generate source in HTML -stylesheetfile <path> File to change style of the generated documentation -docencoding <name> Output encoding name C:java> 下面请看用javadoc生成的文档(请点击本页上面的观看演示链接） 生成文档： C:java>javadoc JavadocDemo.java Loading source file JavadocDemo.java... Constructing Javadoc information... Standard Doclet version 1.4.2_03 Generating constant-values.html... Building tree for all the packages and classes... Building index for all the packages and classes... Generating overview-tree.html... Generating index-all.html... Generating deprecated-list.html... Building index for all classes... Generating allclasses-frame.html... Generating allclasses-noframe.html... Generating index.html... Generating packages.html... Generating JavadocDemo.html... JavadocDemo.java:11: warning - Tag @see: reference not found: javax.swing.Japplet Generating serialized-form.html... Generating package-list... Generating help-doc.html... Generating stylesheet.css... 1 warning C:java> 附源文件： import java.applet.*; import java.awt.*; import java.awt.event.*; /** *JavadocDemo.java,一个显示JavaDoc注释的Applet *<p>注意这只是HelloApplet的一个带注释的版本 *@see java.applet.Applet *@see javax.swing.Japplet */ public class JavadocDemo extends Applet{ /** init()是一个Applet方法，由浏览器调用进行初始化 * 只调用一次 * @return 无 */ public void init(){ //创建并添加一个按钮 //其它什么也不做 Button b; b=new Button("Hello"); add(b); show(); } /** paint() 是一个AWT组件方法，在组件要绘制时调用，只 * 是在Applet的窗口中画带色的方框。 * 参数 g一个java.awt.Graphics * 用在所有绘制方法中 */ public void paint(Graphics g){ int w=getSize().width,h=getSize().height; g.setColor(Color.yellow); g.fillRect(0,0,w/2,h); g.setColor(Color.green); g.fillRect(w/2,0,w,h); g.setColor(Color.black); g.drawString("Welcome to Java",50,50); } /** show()用于使组件可见，此方法在 * JDK1.1中被归入不推荐使用 *@since 1.0 *deprecated换用setVisible(true) */ public void show(){ //由于覆盖了show(),此applet 不能显示 } /** Applet必须有一个公共的无参数构造方法 *@throws java.lang.IllegalArgumentException */ public JavadocDemo(){ if(new java.util.Date().getDay()==0){ throw new IllegalArgumentException("Never on a Sunday"); } } }