8379953: [macos] VoiceOver Reads "Header" instead of "Heading"

Reviewed-by: kizune, prr

src/java.desktop/macosx/native/libawt_lwawt/awt/a11y/CommonComponentAccessibility.m

@@ -849,6 +849,10 @@ static jobject sAccessibilityClass = NULL;
              parent != nil &&
              ![[parent javaRole] isEqualToString:@"combobox"] ) {
              fNSRole = NSAccessibilityMenuRole;
+        } else if ( [javaRole isEqualToString:@"header"]) {
+            if (@available(macOS 26, *)) {
+                fNSRole = NSAccessibilityHeadingRole;
+            }
         }
         if (fNSRole == nil) {
             // this component has assigned itself a custom AccessibleRole not in the sRoles array

test/jdk/javax/accessibility/8379953/VoiceOverHeaderRole.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2026, 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.
+ */
+
+import javax.accessibility.AccessibleContext;
+import javax.accessibility.AccessibleRole;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+/*
+ * @test
+ * @key headful
+ * @bug 8379953
+ * @summary manual test for VoiceOver reading header/heading correctly
+ * @requires os.family == "mac"
+ * @library /java/awt/regtesthelpers
+ * @build PassFailJFrame
+ * @run main/manual VoiceOverHeaderRole
+ */
+
+public class VoiceOverHeaderRole {
+    public static void main(String[] args) throws Exception {
+        String INSTRUCTIONS = "INSTRUCTIONS (Mac-only):\n" +
+                "1. Open VoiceOver\n" +
+                "2. Move the VoiceOver cursor over the JLabel.\n\n" +
+                "Expected behavior: VoiceOver should identify it as a " +
+                "\"heading\". It should not say \"header\".\n\n" +
+                "If you select the link using \"Accessibility " +
+                "Inspector\": it should identify its role as AXHeading.";
+
+        PassFailJFrame.builder()
+                .title("VoiceOverHeaderRole Instruction")
+                .instructions(INSTRUCTIONS)
+                .columns(40)
+                .testUI(VoiceOverHeaderRole::createUI)
+                .build()
+                .awaitAndCheck();
+    }
+
+    private static JFrame createUI() {
+        JPanel p = new JPanel();
+        JLabel label = new JLabel("Octopus") {
+            @Override
+            public AccessibleContext getAccessibleContext() {
+                if (accessibleContext == null) {
+                    accessibleContext = new AccessibleJLabel() {
+                        @Override
+                        public AccessibleRole getAccessibleRole() {
+                            return AccessibleRole.HEADER;
+                        }
+                    };
+                }
+                return accessibleContext;
+            }
+        };
+        p.add(label);
+
+        JFrame frame = new JFrame();
+        frame.getContentPane().add(p);
+        frame.pack();
+        return frame;
+    }
+}