src/java.desktop/share/classes/javax/swing/plaf/basic/BasicMenuItemUI.java

rev 47462 : Fixed JDK-8178430: JMenu in GridBagLayout flickers when label text shows "..."
and is updated.

*** 457,467 ****
--- 457,471 ----
          Dimension d = null;
          View v = (View) c.getClientProperty(BasicHTML.propertyKey);
          if (v != null) {
              d = getPreferredSize(c);
              d.width -= v.getPreferredSpan(View.X_AXIS) - v.getMinimumSpan(View.X_AXIS);
+         } else if (c.getParent() instanceof JMenuBar) {
+             //if the menu is a toplevel item, then return preferred size.
+             d = getPreferredSize(c);
          }
+ 
          return d;
      }
  
      public Dimension getPreferredSize(JComponent c) {
          return getPreferredMenuItemSize(c,