diff -r 000000000000 -r 959103a6100f src/share/classes/com/sun/tools/doclets/formats/html/TreeWriter.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tools/doclets/formats/html/TreeWriter.java	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.tools.doclets.formats.html;
+
+import java.io.*;
+
+import com.sun.javadoc.*;
+import com.sun.tools.doclets.formats.html.markup.*;
+import com.sun.tools.doclets.internal.toolkit.*;
+import com.sun.tools.doclets.internal.toolkit.util.*;
+
+/**
+ * Generate Class Hierarchy page for all the Classes in this run.  Use
+ * ClassTree for building the Tree. The name of
+ * the generated file is "overview-tree.html" and it is generated in the
+ * current or the destination directory.
+ *
+ *  <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>
+ *
+ * @author Atul M Dambalkar
+ * @author Bhavesh Patel (Modified)
+ */
+public class TreeWriter extends AbstractTreeWriter {
+
+    /**
+     * Packages in this run.
+     */
+    private PackageDoc[] packages;
+
+    /**
+     * True if there are no packages specified on the command line,
+     * False otherwise.
+     */
+    private boolean classesonly;
+
+    /**
+     * Constructor to construct TreeWriter object.
+     *
+     * @param configuration the current configuration of the doclet.
+     * @param filename String filename
+     * @param classtree the tree being built.
+     */
+    public TreeWriter(ConfigurationImpl configuration,
+            DocPath filename, ClassTree classtree)
+    throws IOException {
+        super(configuration, filename, classtree);
+        packages = configuration.packages;
+    classesonly = packages.length == 0;
+    }
+
+    /**
+     * Create a TreeWriter object and use it to generate the
+     * "overview-tree.html" file.
+     *
+     * @param classtree the class tree being documented.
+     * @throws  DocletAbortException
+     */
+    public static void generate(ConfigurationImpl configuration,
+                                ClassTree classtree) {
+        TreeWriter treegen;
+        DocPath filename = DocPaths.OVERVIEW_TREE;
+        try {
+            treegen = new TreeWriter(configuration, filename, classtree);
+            treegen.generateTreeFile();
+            treegen.close();
+        } catch (IOException exc) {
+            configuration.standardmessage.error(
+                        "doclet.exception_encountered",
+                        exc.toString(), filename);
+            throw new DocletAbortException(exc);
+        }
+    }
+
+    /**
+     * Generate the interface hierarchy and class hierarchy.
+     */
+    public void generateTreeFile() throws IOException {
+        Content body = getTreeHeader();
+        Content headContent = getResource("doclet.Hierarchy_For_All_Packages");
+        Content heading = HtmlTree.HEADING(HtmlConstants.TITLE_HEADING, false,
+                HtmlStyle.title, headContent);
+        Content div = HtmlTree.DIV(HtmlStyle.header, heading);
+        addPackageTreeLinks(div);
+        body.addContent(div);
+        HtmlTree divTree = new HtmlTree(HtmlTag.DIV);
+        divTree.addStyle(HtmlStyle.contentContainer);
+        addTree(classtree.baseclasses(), "doclet.Class_Hierarchy", divTree);
+        addTree(classtree.baseinterfaces(), "doclet.Interface_Hierarchy", divTree);
+        addTree(classtree.baseAnnotationTypes(), "doclet.Annotation_Type_Hierarchy", divTree);
+        addTree(classtree.baseEnums(), "doclet.Enum_Hierarchy", divTree);
+        body.addContent(divTree);
+        addNavLinks(false, body);
+        addBottom(body);
+        printHtmlDocument(null, true, body);
+    }
+
+    /**
+     * Add the links to all the package tree files.
+     *
+     * @param contentTree the content tree to which the links will be added
+     */
+    protected void addPackageTreeLinks(Content contentTree) {
+        //Do nothing if only unnamed package is used
+        if (packages.length == 1 && packages[0].name().length() == 0) {
+            return;
+        }
+        if (!classesonly) {
+            Content span = HtmlTree.SPAN(HtmlStyle.packageHierarchyLabel,
+                    getResource("doclet.Package_Hierarchies"));
+            contentTree.addContent(span);
+            HtmlTree ul = new HtmlTree(HtmlTag.UL);
+            ul.addStyle(HtmlStyle.horizontal);
+            for (int i = 0; i < packages.length; i++) {
+                // If the package name length is 0 or if -nodeprecated option
+                // is set and the package is marked as deprecated, do not include
+                // the page in the list of package hierarchies.
+                if (packages[i].name().length() == 0 ||
+                        (configuration.nodeprecated && Util.isDeprecated(packages[i]))) {
+                    continue;
+                }
+                DocPath link = pathString(packages[i], DocPaths.PACKAGE_TREE);
+                Content li = HtmlTree.LI(getHyperLink(
+                        link, new StringContent(packages[i].name())));
+                if (i < packages.length - 1) {
+                    li.addContent(", ");
+                }
+                ul.addContent(li);
+            }
+            contentTree.addContent(ul);
+        }
+    }
+
+    /**
+     * Get the tree header.
+     *
+     * @return a content tree for the tree header
+     */
+    protected Content getTreeHeader() {
+        String title = configuration.getText("doclet.Window_Class_Hierarchy");
+        Content bodyTree = getBody(true, getWindowTitle(title));
+        addTop(bodyTree);
+        addNavLinks(true, bodyTree);
+        return bodyTree;
+    }
+}