JDK 11 jdk.javadoc.jmod is the JMOD file for JDK 11 Java Document tool, which can be invoked by the "javadoc" command.

JDK 11 Java Document tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.javadoc.jmod.

JDK 11 Java Document tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Java Document tool source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.javadoc.

You can click and view the content of each source code file in the list below.

⏎ com/sun/javadoc/ProgramElementDoc.java

/*
 * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package com.sun.javadoc;

/**
 * Represents a java program element: class, interface, field,
 * constructor, or method.
 * This is an abstract class dealing with information common to
 * these elements.
 *
 * @see MemberDoc
 * @see ClassDoc
 *
 * @author Robert Field
 *
 * @deprecated
 *   The declarations in this package have been superseded by those
 *   in the package {@code jdk.javadoc.doclet}.
 *   For more information, see the <i>Migration Guide</i> in the documentation for that package.
 */
@Deprecated(since="9", forRemoval=true)
@SuppressWarnings("removal")
public interface ProgramElementDoc extends Doc {

    /**
     * Get the containing class or interface of this program element.
     *
     * @return a ClassDoc for this element's containing class or interface.
     * If this is a top-level class or interface, return null.
     */
    ClassDoc containingClass();

    /**
     * Get the package that this program element is contained in.
     *
     * @return a PackageDoc for this element containing package.
     * If in the unnamed package, this PackageDoc will have the
     * name "".
     */
    PackageDoc containingPackage();

    /**
     * Get the fully qualified name of this program element.
     * For example, for the class {@code java.util.Hashtable},
     * return "java.util.Hashtable".
     * <p>
     * For the method {@code bar()} in class {@code Foo}
     * in the unnamed package, return "Foo.bar".
     *
     * @return the qualified name of the program element as a String.
     */
    String qualifiedName();

    /**
     * Get the modifier specifier integer.
     *
     * @see java.lang.reflect.Modifier
     *
     * @return Get the modifier specifier integer.
     */
    int modifierSpecifier();

    /**
     * Get modifiers string.
     * For example, for:
     * <pre>
     *   public abstract int foo() { ... }
     * </pre>
     * return "public abstract".
     * Annotations are not included.
     *
     * @return "public abstract".
     */
    String modifiers();

    /**
     * Get the annotations of this program element.
     * Return an empty array if there are none.
     *
     * @return the annotations of this program element.
     * @since 1.5
     */
    AnnotationDesc[] annotations();

    /**
     * Return true if this program element is public.
     *
     * @return true if this program element is public.
     */
    boolean isPublic();

    /**
     * Return true if this program element is protected.
     *
     * @return true if this program element is protected.
     */
    boolean isProtected();

    /**
     * Return true if this program element is private.
     *
     * @return true if this program element is private.
     */
    boolean isPrivate();

    /**
     * Return true if this program element is package private.
     *
     * @return true if this program element is package private.
     */
    boolean isPackagePrivate();
    /**
     * Return true if this program element is static.
     *
     * @return true if this program element is static.
     */
    boolean isStatic();

    /**
     * Return true if this program element is final.
     *
     * @return true if this program element is final.
     */
    boolean isFinal();
}

⏎ com/sun/javadoc/ProgramElementDoc.java

Or download all of them as a single archive file:

File name: jdk.javadoc-11.0.1-src.zip
File size: 680806 bytes
Release date: 2018-11-04
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