/*
 * Copyright (c) 1999, 2023, 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.
 *
 * 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.
 *
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 */

/*
 * @test
 * @bug 4191374
 * @summary Verify if JMenuBar.getSubElements returns an array
            with null values
 * @run main bug4191374
 */

import javax.swing.Box;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.MenuElement;
import javax.swing.SwingUtilities;

public class bug4191374 {
    static JMenuBar mb;
    static volatile boolean pass = true;

    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeAndWait(() -> {
            mb = new JMenuBar();
            newMenu(mb);
            newMenu(mb);
            mb.add(Box.createGlue());
            mb.add(new JMenu("Help"));
            MenuElement[] me = mb.getSubElements();
            for (int i = 0; i < me.length; i++) {
                if (me[i] == null)
                    pass = false;
            }
        });
        if (!pass) {
            throw new RuntimeException("Bug 4191374 FAILED");
        }
    }

    public static void newMenu(JMenuBar mb) {
        JMenu m = (JMenu) mb.add(new JMenu("File"));
        m.add("Menu item");
        m.add("Menu item");
        m.add("Menu item");
    }
}