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/tools/javadoc/Main.java

/*
 * Copyright (c) 2000, 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.tools.javadoc;

import java.io.PrintWriter;

import com.sun.tools.javadoc.main.Start;

/**
 * Provides external entry points (tool and programmatic)
 * for the javadoc program.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 *
 * @deprecated
 * This class is now deprecated and may be removed in a future release.
 * See
 * {@code javax.tools.ToolProvider::getSystemDocumentationTool}
 * and
 * {@code javax.tools.DocumentationTool}
 * for replacement functionality.
 *
 * @since 1.4
 */
@Deprecated(since="9", forRemoval=true)
@SuppressWarnings("removal")
public class Main {

    /**
     * Constructor should never be called.
     */
    private Main() {
    }

    /**
     * Command line interface.
     * @param args   The command line parameters.
     */
    public static void main(String... args) {
        System.exit(execute(args));
    }

    /**
     * Programmatic interface.
     * @param args   The command line parameters.
     * @return The return code.
     */
    public static int execute(String... args) {
        Start jdoc = new Start();
        return jdoc.begin(args);
    }

    /**
     * Programmatic interface.
     * @param args   The command line parameters.
     * @param docletParentClassLoader The parent class loader used when
     *  creating the doclet classloader. If null, the class loader used
     *  to instantiate doclets will be created without specifying a parent
     *  class loader.
     * @return The return code.
     * @since 1.7
     */
    public static int execute(ClassLoader docletParentClassLoader, String... args) {
        Start jdoc = new Start(docletParentClassLoader);
        return jdoc.begin(args);
    }

    /**
     * Programmatic interface.
     * @param programName  Name of the program (for error messages).
     * @param args   The command line parameters.
     * @return The return code.
     */
    public static int execute(String programName, String... args) {
        Start jdoc = new Start(programName);
        return jdoc.begin(args);
    }

    /**
     * Programmatic interface.
     * @param programName  Name of the program (for error messages).
     * @param args   The command line parameters.
     * @param docletParentClassLoader The parent class loader used when
     *  creating the doclet classloader. If null, the class loader used
     *  to instantiate doclets will be created without specifying a parent
     *  class loader.
     * @return The return code.
     * @since 1.7
     */
    public static int execute(String programName, ClassLoader docletParentClassLoader, String... args) {
        Start jdoc = new Start(programName, docletParentClassLoader);
        return jdoc.begin(args);
    }

    /**
     * Programmatic interface.
     * @param programName  Name of the program (for error messages).
     * @param defaultDocletClassName  Fully qualified class name.
     * @param args   The command line parameters.
     * @return The return code.
     */
    public static int execute(String programName,
                              String defaultDocletClassName,
                              String... args) {
        Start jdoc = new Start(programName, defaultDocletClassName);
        return jdoc.begin(args);
    }

    /**
     * Programmatic interface.
     * @param programName  Name of the program (for error messages).
     * @param defaultDocletClassName  Fully qualified class name.
     * @param docletParentClassLoader The parent class loader used when
     *  creating the doclet classloader. If null, the class loader used
     *  to instantiate doclets will be created without specifying a parent
     *  class loader.
     * @param args   The command line parameters.
     * @return The return code.
     * @since 1.7
     */
    public static int execute(String programName,
                              String defaultDocletClassName,
                              ClassLoader docletParentClassLoader,
                              String... args) {
        Start jdoc = new Start(programName, defaultDocletClassName, docletParentClassLoader);
        return jdoc.begin(args);
    }

    /**
     * Programmatic interface.
     * @param programName  Name of the program (for error messages).
     * @param errWriter    PrintWriter to receive error messages.
     * @param warnWriter    PrintWriter to receive error messages.
     * @param noticeWriter    PrintWriter to receive error messages.
     * @param defaultDocletClassName  Fully qualified class name.
     * @param args   The command line parameters.
     * @return The return code.
     */
    public static int execute(String programName,
                              PrintWriter errWriter,
                              PrintWriter warnWriter,
                              PrintWriter noticeWriter,
                              String defaultDocletClassName,
                              String... args) {
        Start jdoc = new Start(programName,
                               errWriter, warnWriter, noticeWriter,
                               defaultDocletClassName);
        return jdoc.begin(args);
    }

    /**
     * Programmatic interface.
     * @param programName  Name of the program (for error messages).
     * @param errWriter    PrintWriter to receive error messages.
     * @param warnWriter    PrintWriter to receive error messages.
     * @param noticeWriter    PrintWriter to receive error messages.
     * @param defaultDocletClassName  Fully qualified class name.
     * @param docletParentClassLoader The parent class loader used when
     *  creating the doclet classloader. If null, the class loader used
     *  to instantiate doclets will be created without specifying a parent
     *  class loader.
     * @param args   The command line parameters.
     * @return The return code.
     * @since 1.7
     */
    public static int execute(String programName,
                              PrintWriter errWriter,
                              PrintWriter warnWriter,
                              PrintWriter noticeWriter,
                              String defaultDocletClassName,
                              ClassLoader docletParentClassLoader,
                              String... args) {
        Start jdoc = new Start(programName,
                               errWriter, warnWriter, noticeWriter,
                               defaultDocletClassName,
                               docletParentClassLoader);
        return jdoc.begin(args);
    }
}

⏎ com/sun/tools/javadoc/Main.java

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