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 }