src/java.desktop/share/classes/javax/swing/plaf/metal/MetalRadioButtonUI.java

@@ -242,11 +242,11 @@
                    g.setColor(b.getForeground());
                } else {
                    // *** paint the text disabled
                    g.setColor(getDisabledTextColor());
                }
-               SwingUtilities2.drawStringUnderlineCharAt(c,g,text,
+               getTextUIDrawing().drawStringUnderlineCharAt(c,g,text,
                        mnemIndex, textRect.x, textRect.y + fm.getAscent());
            }
            if(b.hasFocus() && b.isFocusPainted() &&
               textRect.width > 0 && textRect.height > 0 ) {
                paintFocus(g,textRect,size);