/*

 * Copyright (c) 2012, 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.

 *

 * 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.

 */

/* @test

 * @bug 7160242

 * @summary Check if NullPointerException is thrown if the key passed

 *          to remove() is null.

 */

import java.util.prefs.Preferences;

public class RemoveNullKeyCheck {

    public static void main(String[] args) throws Exception {

       try {

           Preferences node = Preferences.userRoot().node("N1");

           node.remove(null);

           throw new RuntimeException("Expected NullPointerException " +

                                      "not thrown");

       } catch (NullPointerException npe) {

           System.out.println("NullPointerException thrown");

       }

    }

}