--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/awt/LightweightFrame.java	Fri Feb 22 15:13:13 2013 +0400
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 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 sun.awt;
+
+import java.awt.Container;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.MenuBar;
+import java.awt.MenuComponent;
+import java.awt.Toolkit;
+import java.awt.peer.FramePeer;
+
+/**
+ * The class provides basic functionality for a lightweight frame
+ * implementation. A subclass is expected to provide painting to an
+ * offscreen image and access to it. Thus it can be used for lightweight
+ * embedding.
+ *
+ * @author Artem Ananiev
+ * @author Anton Tarasov
+ */
+@SuppressWarnings("serial")
+public abstract class LightweightFrame extends Frame {
+
+    /**
+     * Constructs a new, initially invisible {@code LightweightFrame}
+     * instance.
+     */
+    public LightweightFrame() {
+        setUndecorated(true);
+        setResizable(true);
+        setEnabled(true);
+    }
+
+    /**
+     * Blocks introspection of a parent window by this child.
+     *
+     * @return null
+     */
+    @Override public final Container getParent() { return null; }
+
+    @Override public Graphics getGraphics() { return null; }
+
+    @Override public final boolean isResizable() { return true; }
+
+    // Block modification of any frame attributes, since they aren't
+    // applicable for a lightweight frame.
+
+    @Override public final void setTitle(String title) {}
+    @Override public final void setIconImage(Image image) {}
+    @Override public final void setIconImages(java.util.List<? extends Image> icons) {}
+    @Override public final void setMenuBar(MenuBar mb) {}
+    @Override public final void setResizable(boolean resizable) {}
+    @Override public final void remove(MenuComponent m) {}
+    @Override public final void toFront() {}
+    @Override public final void toBack() {}
+
+    @Override public void addNotify() {
+        synchronized (getTreeLock()) {
+            if (getPeer() == null) {
+                SunToolkit stk = (SunToolkit)Toolkit.getDefaultToolkit();
+                try {
+                    setPeer(stk.createLightweightFrame(this));
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            super.addNotify();
+        }
+    }
+
+    private void setPeer(final FramePeer p) {
+        AWTAccessor.getComponentAccessor().setPeer(this, p);
+    }
+
+    /**
+     * Requests the peer to emulate activation or deactivation of the
+     * frame. Peers should override this method if they are to implement
+     * this functionality.
+     *
+     * @param activate if <code>true</code>, activates the frame;
+     *                 otherwise, deactivates the frame
+     */
+    public void emulateActivation(boolean activate) {
+        ((FramePeer)getPeer()).emulateActivation(activate);
+    }
+
+    /**
+     * Delegates the focus grab action to the client (embedding) application.
+     * The method is called by the AWT grab machinery.
+     *
+     * @see SunToolkit#grab(java.awt.Window)
+     */
+    public abstract void grabFocus();
+
+    /**
+     * Delegates the focus ungrab action to the client (embedding) application.
+     * The method is called by the AWT grab machinery.
+     *
+     * @see SunToolkit#ungrab(java.awt.Window)
+     */
+    public abstract void ungrabFocus();
+}