Javaでオーバーライドされた元のメソッドを呼ぶ

reflection test

        Class clazz = Application.class;
        Method method = clazz.getDeclaredMethod("validate", String.class);
        method.setAccessible(true);
        method.invoke(null, "1w");

        Field field = clazz.getSuperclass().getDeclaredField("validation");
        field.setAccessible(true);

        Validation v = (Validation) field.get(null);
        assertEquals(1, v.errorsMap().size());
        Method m = v.getClass().getDeclaredMethod("clear");
        m.invoke(null);
        assertEquals(0, v.errorsMap().size());