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/util/TreePathScanner.java

/*
 * Copyright (c) 2006, 2016, 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.util;

import com.sun.source.tree.*;

/**
 * A TreeVisitor that visits all the child tree nodes, and provides
 * support for maintaining a path for the parent nodes.
 * To visit nodes of a particular type, just override the
 * corresponding visitorXYZ method.
 * Inside your method, call super.visitXYZ to visit descendant
 * nodes.
 *
 * @apiNote
 * In order to initialize the "current path", the scan must be
 * started by calling one of the {@code scan} methods.
 *
 * @author Jonathan Gibbons
 * @since 1.6
 */
public class TreePathScanner<R, P> extends TreeScanner<R, P> {

    /**
     * Scans a tree from a position identified by a TreePath.
     * @param path the path identifying the node to be scanned
     * @param p a parameter value passed to visit methods
     * @return the result value from the visit method
     */
    public R scan(TreePath path, P p) {
        this.path = path;
        try {
            return path.getLeaf().accept(this, p);
        } finally {
            this.path = null;
        }
    }

    /**
     * Scans a single node.
     * The current path is updated for the duration of the scan.
     *
     * @apiNote This method should normally only be called by the
     * scanner's {@code visit} methods, as part of an ongoing scan
     * initiated by {@link #scan(TreePath,Object) scan(TreePath, P)}.
     * The one exception is that it may also be called to initiate
     * a full scan of a {@link CompilationUnitTree}.
     *
     * @return the result value from the visit method
     */
    @Override
    public R scan(Tree tree, P p) {
        if (tree == null)
            return null;

        TreePath prev = path;
        path = new TreePath(path, tree);
        try {
            return tree.accept(this, p);
        } finally {
            path = prev;
        }
    }

    /**
     * Returns the current path for the node, as built up by the currently
     * active set of scan calls.
     * @return the current path
     */
    public TreePath getCurrentPath() {
        return path;
    }

    private TreePath path;
}

⏎ com/sun/source/util/TreePathScanner.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
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