8269951: [macos] Focus not painted in JButton when setBorderPainted(false) is invoked

src/java.desktop/macosx/classes/com/apple/laf/AquaButtonUI.java

@@ -326,6 +326,14 @@ public void paint(final Graphics g, final JComponent c) {
         }
     }
 
+    protected void paintFocus(Graphics g, AbstractButton b,
+                              Rectangle viewRect, Rectangle textRect, Rectangle iconRect) {
+        final Border border = b.getBorder();
+        if (border instanceof AquaButtonBorder) {
+            ((AquaButtonBorder)border).paintButton(b, g, 0, 0, b.getWidth(), b.getHeight());
+        }
+    }
+
     protected String layoutAndGetText(final Graphics g, final AbstractButton b, final AquaButtonBorder aquaBorder, final Insets i, Rectangle viewRect, Rectangle iconRect, Rectangle textRect) {
         // re-initialize the view rect to the selected insets
         viewRect.x = i.left;

test/jdk/javax/swing/plaf/aqua/AquaButtonFocusTest.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2021, 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.
+ */
+
+/*
+ * @test
+ * @requires (os.family == "mac")
+ * @bug 8269951
+ * @summary Test checks that focus is painted on JButton even
+ *          when borders turned off
+ * @library ../../regtesthelpers
+ * @build Util
+ * @run main AquaButtonFocusTest
+ */
+
+
+import javax.swing.JButton;
+import javax.swing.UIManager;
+import java.awt.Graphics;
+import java.awt.image.BufferedImage;
+
+public class AquaButtonFocusTest {
+    public static void main(String[] args) {
+        new AquaButtonFocusTest().performTest();
+    }
+
+    public void performTest() {
+        try {
+            UIManager.setLookAndFeel("com.apple.laf.AquaLookAndFeel");
+        } catch (Exception e) {
+            throw new RuntimeException("Can not initialize Aqua L&F");
+        }
+
+        FocusableButton one = new FocusableButton("One");
+        one.setSize(100, 100);
+        one.setBorderPainted(false);
+        BufferedImage noFocus = new BufferedImage(200, 100, BufferedImage.TYPE_INT_ARGB);
+        Graphics g = noFocus.createGraphics();
+        one.paint(g);
+        g.dispose();
+        BufferedImage focus = new BufferedImage(200, 100, BufferedImage.TYPE_INT_ARGB);
+        one.setFocusOwner(true);
+        g = focus.createGraphics();
+        one.paint(g);
+        g.dispose();
+        if (Util.compareBufferedImages(noFocus, focus)) {
+            throw new RuntimeException("Focus is not painted on JButton");
+        }
+    }
+
+    class FocusableButton extends JButton {
+        private boolean focusOwner = false;
+
+        public FocusableButton(String label) {
+            super(label);
+        }
+
+        public void setFocusOwner(boolean focused) {
+            this.focusOwner = focused;
+        }
+
+        @Override
+        public boolean isFocusOwner() {
+            return focusOwner;
+        }
+
+        @Override
+        public boolean hasFocus() {
+            return this.focusOwner;
+        }
+    }
+}