--- old/src/java.desktop/share/classes/javax/swing/plaf/basic/BasicLookAndFeel.java	2018-04-10 15:05:56.177209999 +0530
+++ new/src/java.desktop/share/classes/javax/swing/plaf/basic/BasicLookAndFeel.java	2018-04-10 15:05:55.893209999 +0530
@@ -1093,7 +1093,9 @@
             "Menu.submenuPopupOffsetX", 0,
             "Menu.submenuPopupOffsetY", 0,
             "Menu.shortcutKeys", new int[]{
-                SwingUtilities2.getSystemMnemonicKeyMask()
+                SwingUtilities2.getSystemMnemonicKeyMask(),
+                SwingUtilities2.getSystemMnemonicKeyMask() |
+                        InputEvent.ALT_GRAPH_DOWN_MASK
             },
             "Menu.crossMenuMnemonic", Boolean.TRUE,
             // Menu.cancelMode affects the cancel menu action behaviour;
