1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 6919529

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

    28  *   is null.

    29  * @run main MultiUIDefaultsNPECheck

    30  */

    31 import javax.swing.LookAndFeel;

    32 import javax.swing.JLabel;

    33 import javax.swing.UIManager;

    34 import javax.swing.UnsupportedLookAndFeelException;

    35 import javax.swing.UIDefaults;

    36 import javax.swing.SwingUtilities;

    37 

    38 public class MultiUIDefaultsNPECheck {

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

    40         SwingUtilities.invokeAndWait(() -> {

    41             Test();

    42         });

    43     }

    44 

    45     public static void Test() {

    46         JLabel label = new JLabel();

    47 

    48         try {

    49             UIManager.setLookAndFeel(new LookAndFeel() {

    50                 @Override

    51                 public String getName() {

    52                     return null;

    53                 }

    54 

    55                 @Override

    56                 public String getID() {

    57                     return null;

    58                 }

    59 

    60                 @Override

    61                 public String getDescription() {

    62                     return null;

    63                 }

    64 

    65                 @Override

    66                 public boolean isNativeLookAndFeel() {

    67                     return false;

    68                 }

    69 

    70                 @Override

    71                 public boolean isSupportedLookAndFeel() {

    72                     return true;

    73                 }

    74 

    75                 @Override

    76                 public UIDefaults getDefaults() {

    77                     return null;

    78                 }

    79             });

    80         }  catch (UnsupportedLookAndFeelException e) {

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

    82                 "unsupported look and feel");

    83             return;

    84         }

    85 

    86         try {

    87             UIManager.getDefaults().getUI(label);

    88         } catch (NullPointerException e) {

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

    90                     "Test Failed");

    91         }

    92     }

    93 }