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Java 9 - Improved Javadoc

Java 9 New Features

The javadoc tool can generate Java documentation. The output of javadoc in Java 9 now complies with the HTML5 standard.

Older Version Documentation Before Java 9

Consider the following file code C:/JAVA/Tester.java:

Example

/**
  * @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");
   }
}

Generating documentation using javadoc from JDK 7:

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:\JAVA\Tester.html...
Generating C:\JAVA\package-frame.html...
Generating C:\JAVA\package-summary.html...
Generating C:\JAVA\package-tree.html...
Generating C:\JAVA\constant-values.html...
Building index for all the packages and classes...
Generating C:\JAVA\overview-tree.html...
Generating C:\JAVA\index-all.html...
Generating C:\JAVA\deprecated-list.html...
Building index for all classes...
Generating C:\JAVA\allclasses-frame.html...
Generating C:\JAVA\allclasses-noframe.html...
Generating C:\JAVA\index.html...
Generating C:\JAVA\help-doc.html...

Executing the above command will generate documentation pages under C:/JAVA, as shown below:

Java 9 Generated Documentation Compatible with HTML5 Standard

Using the -html5 parameter in the JDK 9 javadoc command allows the generated documentation to support the HTML5 standard:

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:\JAVA\Tester.html...
Generating C:\JAVA\package-frame.html...
Generating C:\JAVA\package-summary.html...
Generating C:\JAVA\package-tree.html...
Generating C:\JAVA\constant-values.html...
Building index for all the packages and classes...
Generating C:\JAVA\overview-tree.html...
Generating C:\JAVA\index-all.html...
Generating C:\JAVA\deprecated-list.html...
Building index for all classes...
Generating C:\JAVA\allclasses-frame.html...

Generating C:\JAVA\allclasses-frame.html... Generating C:\JAVA\allclasses-noframe.html... Generating C:\JAVA\allclasses-noframe.html... Generating C:\JAVA\index.html... Generating C:\JAVA\help-doc.html...

Executing the above commands will generate document pages under C:/JAVA, as shown in the image below:

Java 9 New Features

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