8346260: Test "javax/swing/JOptionPane/bug4174551.java" failed because the font size of message "Hi 24" is not set to 24 in Nimbus LookAndFeel

Reviewed-by: aivanov, dnguyen

Author: prsadhuk

src/java.desktop/share/classes/javax/swing/plaf/synth/SynthDefaultLookup.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2024, 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
@@ -25,7 +25,9 @@
 package javax.swing.plaf.synth;
 
 import sun.swing.DefaultLookup;
+
 import javax.swing.JComponent;
+import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 
 /**
@@ -35,6 +37,12 @@
  */
 class SynthDefaultLookup extends DefaultLookup {
     public Object getDefault(JComponent c, ComponentUI ui, String key) {
+        if (ui instanceof SynthOptionPaneUI) {
+            Object value = super.getDefault(c, ui, key);
+            if (value != null) {
+                return value;
+            }
+        }
         if (!(ui instanceof SynthUI)) {
             Object value = super.getDefault(c, ui, key);
             return value;

test/jdk/javax/swing/JOptionPane/bug4174551.java

@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug 4174551
+ * @bug 4174551 8346260
  * @summary JOptionPane should allow custom buttons
  * @library /java/awt/regtesthelpers
  * @build PassFailJFrame