Java/Swing JFC/Window

Get Window from a component

 
/*
 * $Id: WindowUtils.java,v 1.16 2009/05/25 16:37:52 kschaefe Exp $
 *
 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
import java.awt.ruponent;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Window;
import javax.swing.JOptionPane;
/**
 * Encapsulates various utilities for windows (ie: <code>Frame</code> and
 * <code>Dialog</code> objects and descendants, in particular).
 *
 * @author Richard Bair
 */
public class Utils {
  public static Window findWindow(Component c) {
    if (c == null) {
        return JOptionPane.getRootFrame();
    } else if (c instanceof Window) {
        return (Window) c;
    } else {
        return findWindow(c.getParent());
    }
}
}

Have borders on a JWindow/JFrame

 
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JWindow;
public class Main{
  public static void main(String s[]) {
    JWindow win = new JWindow();
    JPanel pan = new JPanel();
    win.add(pan, "Center");
    pan.setLayout(new FlowLayout());
    pan.add(new JButton("Hello"));
    win.setSize(200, 200);
    win.setVisible(true);
  }
}