/*

 * Copyright (c) 2017, 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 6919529

 * @summary Checks if there is a null pointer exception when the component UI

 *   is null.

 * @run main MultiUIDefaultsNPECheck

 */

import javax.swing.LookAndFeel;

import javax.swing.JLabel;

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

import javax.swing.UIDefaults;

import javax.swing.SwingUtilities;

public class MultiUIDefaultsNPECheck {

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

        SwingUtilities.invokeAndWait(() -> {

            Test();

        });

    }

    public static void Test() {

        JLabel label = new JLabel();

        try {

            UIManager.setLookAndFeel(new LookAndFeel() {

                @Override

                public String getName() {

                    return null;

                }

                @Override

                public String getID() {

                    return null;

                }

                @Override

                public String getDescription() {

                    return null;

                }

                @Override

                public boolean isNativeLookAndFeel() {

                    return false;

                }

                @Override

                public boolean isSupportedLookAndFeel() {

                    return true;

                }

                @Override

                public UIDefaults getDefaults() {

                    return null;

                }

            });

        }  catch (UnsupportedLookAndFeelException e) {

            System.err.println("Warning: test not applicable because of " +

                "unsupported look and feel");

            return;

        }

        try {

            UIManager.getDefaults().getUI(label);

        } catch (NullPointerException e) {

            throw new RuntimeException("Got null pointer exception. Hence " +

                    "Test Failed");

        }

    }

}