javadoc 工具可以生成 Java 文档, Java 9 的 javadoc 的输出现在符合兼容 HTML5 标准。
Java 9 之前的旧版本文档
考虑以下文件代码 C:/JAVA/Tester.java:
实例
/**
  * @author MahKumar
  * @version 0.1
*/
public class Tester {
   /**
      * Default method to be run to print 
      * <p>Hello world</p>
      * @param args command line arguments
   */
   public static void main(String []args) {
      System.out.println("Hello World");
   }
}
使用 jdk 7 的 javadoc 生成文档:
C:JAVA>javadoc -d C:/JAVA Tester.java Loading source file tester.java... Constructing Javadoc information... Standard Doclet version 1.7.0_21 Building tree for all the packages and classes... Generating C:JAVATester.html... Generating C:JAVApackage-frame.html... Generating C:JAVApackage-summary.html... Generating C:JAVApackage-tree.html... Generating C:JAVAconstant-values.html... Building index for all the packages and classes... Generating C:JAVAoverview-tree.html... Generating C:JAVAindex-all.html... Generating C:JAVAdeprecated-list.html... Building index for all classes... Generating C:JAVAallclasses-frame.html... Generating C:JAVAallclasses-noframe.html... Generating C:JAVAindex.html... Generating C:JAVAhelp-doc.html...
执行以上命令会再 C:/JAVA 命令下生成文档页面,如下图所示:

Java 9 生成的文档兼容 HTML5 标准
使用 jdk 9 javadoc 命令中的 -html5 参数可以让生成的文档支持 HTML5 标准:
C:JAVA> javadoc -d C:/JAVA -html5 Tester.java Loading source file Tester.java... Constructing Javadoc information... Standard Doclet version 9.0.1 Building tree for all the packages and classes... Generating C:JAVATester.html... Generating C:JAVApackage-frame.html... Generating C:JAVApackage-summary.html... Generating C:JAVApackage-tree.html... Generating C:JAVAconstant-values.html... Building index for all the packages and classes... Generating C:JAVAoverview-tree.html... Generating C:JAVAindex-all.html... Generating C:JAVAdeprecated-list.html... Building index for all classes... Generating C:JAVAallclasses-frame.html... Generating C:JAVAallclasses-frame.html... Generating C:JAVAallclasses-noframe.html... Generating C:JAVAallclasses-noframe.html... Generating C:JAVAindex.html... Generating C:JAVAhelp-doc.html...
执行以上命令会再 C:/JAVA 命令下生成文档页面,如下图所示:

 Java 9 新特性