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/Messager.java

/*
 * Copyright (c) 1997, 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.main;

import java.io.PrintWriter;
import java.util.Locale;
import java.util.ResourceBundle;

import com.sun.javadoc.*;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.Context.Factory;
import com.sun.tools.javac.util.JCDiagnostic;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType;
import com.sun.tools.javac.util.JavacMessages;
import com.sun.tools.javac.util.Log;

/**
 * Utility for integrating with javadoc tools and for localization.
 * Handle Resources. Access to error and warning counts.
 * Message formatting.
 * <br>
 * Also provides implementation for DocErrorReporter.
 *
 *  <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>
 *
 * @see java.util.ResourceBundle
 * @see java.text.MessageFormat
 * @author Neal Gafter (rewrite)
 */
@Deprecated(since="9", forRemoval=true)
@SuppressWarnings("removal")
public class Messager extends Log implements DocErrorReporter {
    public static final SourcePosition NOPOS = null;

    /** Get the current messager, which is also the compiler log. */
    public static Messager instance0(Context context) {
        Log instance = context.get(logKey);
        if (instance == null || !(instance instanceof Messager))
            throw new InternalError("no messager instance!");
        return (Messager)instance;
    }

    public static void preRegister(Context context,
                                   final String programName) {
        context.put(logKey, (Factory<Log>)c -> new Messager(c, programName));
    }
    public static void preRegister(Context context,
                                   final String programName,
                                   final PrintWriter errWriter,
                                   final PrintWriter warnWriter,
                                   final PrintWriter noticeWriter) {
        context.put(logKey, (Factory<Log>)c -> new Messager(c,
                            programName,
                            errWriter,
                            warnWriter,
                            noticeWriter));
    }

    public class ExitJavadoc extends Error {
        private static final long serialVersionUID = 0;
    }

    final String programName;

    private Locale locale;
    private final JavacMessages messages;
    private final JCDiagnostic.Factory javadocDiags;

    /** The default writer for diagnostics
     */
    static final PrintWriter defaultErrWriter = new PrintWriter(System.err);
    static final PrintWriter defaultWarnWriter = new PrintWriter(System.err);
    static final PrintWriter defaultNoticeWriter = new PrintWriter(System.out);

    /**
     * Constructor
     * @param programName  Name of the program (for error messages).
     */
    protected Messager(Context context, String programName) {
        this(context, programName, defaultErrWriter, defaultWarnWriter, defaultNoticeWriter);
    }

    /**
     * Constructor
     * @param programName  Name of the program (for error messages).
     * @param errWriter    Stream for error messages
     * @param warnWriter   Stream for warnings
     * @param noticeWriter Stream for other messages
     */
    @SuppressWarnings("deprecation")
    protected Messager(Context context,
                       String programName,
                       PrintWriter errWriter,
                       PrintWriter warnWriter,
                       PrintWriter noticeWriter) {
        super(context, errWriter, warnWriter, noticeWriter);
        messages = JavacMessages.instance(context);
        messages.add(locale -> ResourceBundle.getBundle("com.sun.tools.javadoc.resources.javadoc",
                                                         locale));
        javadocDiags = new JCDiagnostic.Factory(messages, "javadoc");
        this.programName = programName;

    }

    public void setLocale(Locale locale) {
        this.locale = locale;
    }

    /**
     * get and format message string from resource
     *
     * @param key selects message from resource
     * @param args arguments for the message
     */
    String getText(String key, Object... args) {
        return messages.getLocalizedString(locale, key, args);
    }

    /**
     * Print error message, increment error count.
     * Part of DocErrorReporter.
     *
     * @param msg message to print
     */
    public void printError(String msg) {
        printError(null, msg);
    }

    /**
     * Print error message, increment error count.
     * Part of DocErrorReporter.
     *
     * @param pos the position where the error occurs
     * @param msg message to print
     */
    public void printError(SourcePosition pos, String msg) {
        if (diagListener != null) {
            report(DiagnosticType.ERROR, pos, msg);
            return;
        }

        if (nerrors < MaxErrors) {
            String prefix = (pos == null) ? programName : pos.toString();
            PrintWriter errWriter = getWriter(WriterKind.ERROR);
            errWriter.println(prefix + ": " + getText("javadoc.error") + " - " + msg);
            errWriter.flush();
            prompt();
            nerrors++;
        }
    }

    /**
     * Print warning message, increment warning count.
     * Part of DocErrorReporter.
     *
     * @param msg message to print
     */
    public void printWarning(String msg) {
        printWarning(null, msg);
    }

    /**
     * Print warning message, increment warning count.
     * Part of DocErrorReporter.
     *
     * @param pos the position where the error occurs
     * @param msg message to print
     */
    public void printWarning(SourcePosition pos, String msg) {
        if (diagListener != null) {
            report(DiagnosticType.WARNING, pos, msg);
            return;
        }

        if (nwarnings < MaxWarnings) {
            String prefix = (pos == null) ? programName : pos.toString();
            PrintWriter warnWriter = getWriter(WriterKind.WARNING);
            warnWriter.println(prefix +  ": " + getText("javadoc.warning") +" - " + msg);
            warnWriter.flush();
            nwarnings++;
        }
    }

    /**
     * Print a message.
     * Part of DocErrorReporter.
     *
     * @param msg message to print
     */
    public void printNotice(String msg) {
        printNotice(null, msg);
    }

    /**
     * Print a message.
     * Part of DocErrorReporter.
     *
     * @param pos the position where the error occurs
     * @param msg message to print
     */
    public void printNotice(SourcePosition pos, String msg) {
        if (diagListener != null) {
            report(DiagnosticType.NOTE, pos, msg);
            return;
        }

        PrintWriter noticeWriter = getWriter(WriterKind.NOTICE);
        if (pos == null)
            noticeWriter.println(msg);
        else
            noticeWriter.println(pos + ": " + msg);
        noticeWriter.flush();
    }

    /**
     * Print error message, increment error count.
     *
     * @param key selects message from resource
     */
    public void error(SourcePosition pos, String key, Object... args) {
        printError(pos, getText(key, args));
    }

    /**
     * Print warning message, increment warning count.
     *
     * @param key selects message from resource
     */
    public void warning(SourcePosition pos, String key, Object... args) {
        printWarning(pos, getText(key, args));
    }

    /**
     * Print a message.
     *
     * @param key selects message from resource
     */
    public void notice(String key, Object... args) {
        printNotice(getText(key, args));
    }

    /**
     * Return total number of errors, including those recorded
     * in the compilation log.
     */
    public int nerrors() { return nerrors; }

    /**
     * Return total number of warnings, including those recorded
     * in the compilation log.
     */
    public int nwarnings() { return nwarnings; }

    /**
     * Print exit message.
     */
    public void exitNotice() {
        if (nerrors > 0) {
            notice((nerrors > 1) ? "main.errors" : "main.error",
                   "" + nerrors);
        }
        if (nwarnings > 0) {
            notice((nwarnings > 1) ?  "main.warnings" : "main.warning",
                   "" + nwarnings);
        }
    }

    /**
     * Force program exit, e.g., from a fatal error.
     * <p>
     * TODO: This method does not really belong here.
     */
    public void exit() {
        throw new ExitJavadoc();
    }

    private void report(DiagnosticType type, SourcePosition pos, String msg) {
        switch (type) {
            case ERROR:
            case WARNING:
                Object prefix = (pos == null) ? programName : pos;
                report(javadocDiags.create(type, null, null, "msg", prefix, msg));
                break;

            case NOTE:
                String key = (pos == null) ? "msg" : "pos.msg";
                report(javadocDiags.create(type, null, null, key, pos, msg));
                break;

            default:
                throw new IllegalArgumentException(type.toString());
        }
    }
}

⏎ com/sun/tools/javadoc/main/Messager.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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