### Question:
IntegerAccessor implements PropertyAccessor<Integer> { @Override public String toString(Object object) { return object != null ? object.toString() : null; }  @Override final Integer fromBytes(Class targetClass, byte[] b); @Override final byte[] toBytes(Object val); @Override String toString(Object object); @Override Integer fromString(Class targetClass, String s); @Override Integer getCopy(Object object); Integer getInstance(Class<?> clazz);  }### Answer:
@Test public void testToStringObject() { Assert.assertNull(accessor.toString(null)); Integer d1 = new Integer(4); String s1 = d1.toString(); String s2 = accessor.toString(d1); Assert.assertTrue(s1.equals(s2)); }