JDK 11 jdk.compiler.jmod is the JMOD file for JDK 11 Compiler tool, which can be invoked by the "javac" command.

JDK 11 Compiler tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.compiler.jmod.

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

JDK 11 Compiler source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.compiler.

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

⏎ com/sun/source/doctree/IndexTree.java

/*
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package com.sun.source.doctree;

import java.util.List;

/**
 * A tree node for an @index or @index inline tag.
 *
 * <p>
 * {&#064;index keyword optional description} <br>
 *
 * @since 9
 */
public interface IndexTree extends InlineTagTree {
    /**
     * Returns the specified search term.
     * @return the search term
     */
    DocTree getSearchTerm();

    /**
     * Returns the description, if any.
     * @return the description
     */
    List<? extends DocTree> getDescription();
}

⏎ com/sun/source/doctree/IndexTree.java

Or download all of them as a single archive file:

File name: jdk.compiler-11.0.1-src.zip
File size: 1347269 bytes
Release date: 2018-11-04
Download 

⇒ JDK 11 jdk.crypto.cryptoki.jmod - Crypto KI Module

⇐ JDK 11 jdk.charsets.jmod - Charsets Module

⇑ Download and Use JDK 11

⇑⇑ FAQ for JDK (Java Development Kit)