1 /*

     2  * Copyright (c) 2018, 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 import java.awt.Font;

    25 

    26 import javax.swing.JSpinner;

    27 import javax.swing.SwingUtilities;

    28 import javax.swing.UIManager;

    29 import javax.swing.UnsupportedLookAndFeelException;

    30 import javax.swing.plaf.UIResource;

    31 

    32 import static javax.swing.JSpinner.DefaultEditor;

    33 import static javax.swing.UIManager.getInstalledLookAndFeels;

    34 

    35 /**

    36  * @test

    37  * @key headful

    38  * @bug 8210739

    39  */

    40 public final class FontSetToNull {

    41 

    42     private static final Font USERS_FONT = new Font("dialog", Font.BOLD, 41);

    43 

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

    45         for (final UIManager.LookAndFeelInfo laf : getInstalledLookAndFeels()) {

    46             SwingUtilities.invokeAndWait(() -> setLookAndFeel(laf));

    47             SwingUtilities.invokeAndWait(() -> {

    48                 // default spinner

    49                 test(new JSpinner());

    50                 // spinner which always uses the null font

    51                 test(new JSpinner(){

    52                     @Override

    53                     public Font getFont() {

    54                         return null;

    55                     }

    56                 });

    57             });

    58         }

    59     }

    60 

    61     /**

    62      * A sequence of methods that test a possible NPE.

    63      */

    64     private static void test(JSpinner spinner) {

    65         final DefaultEditor de = (DefaultEditor) spinner.getEditor();

    66 

    67         spinner.setFont(null); // Check possible NPE

    68         SwingUtilities.updateComponentTreeUI(de); // Check possible NPE

    69         spinner.setFont(null); // Check possible NPE

    70 

    71         // should not replace the font of the TextField

    72         de.getTextField().setFont(USERS_FONT);

    73         spinner.setFont(null);

    74 

    75         final Font tff = de.getTextField().getFont();

    76         if (tff instanceof UIResource || !tff.equals(USERS_FONT)) {

    77             throw new RuntimeException("Wrong font: " + tff);

    78         }

    79 

    80         spinner.setEditor(new JSpinner().getEditor()); // Check possible NPE

    81     }

    82 

    83     private static void setLookAndFeel(final UIManager.LookAndFeelInfo laf) {

    84         try {

    85             UIManager.setLookAndFeel(laf.getClassName());

    86             System.out.println("LookAndFeel: " + laf.getClassName());

    87         } catch (ClassNotFoundException | InstantiationException |

    88                 UnsupportedLookAndFeelException | IllegalAccessException e) {

    89             throw new RuntimeException(e);

    90         }

    91     }

    92 }