--- /dev/null	2014-04-16 18:38:06.000000000 +0400
+++ new/src/share/classes/sun/awt/util/ThreadGroupUtils.java	2014-04-16 18:38:06.000000000 +0400
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2014, 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 sun.awt.util;
+
+/**
+ * A utility class needed to access the root {@code ThreadGroup}
+ *
+ * The class should not depend on any others, because it' called from JNI_OnLoad of the AWT
+ * native library. Triggering class loading could could lead to a deadlock.
+ */
+public final class ThreadGroupUtils {
+
+    private ThreadGroupUtils() {
+        // Avoid instantiation
+    }
+
+    /**
+     * Returns a root thread group.
+     * Should be called with {@link sun.security.util.SecurityConstants#MODIFY_THREADGROUP_PERMISSION}
+     *
+     * @return a root {@code ThreadGroup}
+     */
+    public static ThreadGroup getRootThreadGroup() {
+        ThreadGroup currentTG = Thread.currentThread().getThreadGroup();
+        ThreadGroup parentTG = currentTG.getParent();
+        while (parentTG != null) {
+            currentTG = parentTG;
+            parentTG = currentTG.getParent();
+        }
+        return currentTG;
+    }
+}