A DESCRIPTION OF THE PROBLEM :
Method description states:

A bean may have a "default" property that is the property that will mostly commonly be initially chosen for update by human's who are customizing the bean.

Apostrophe ( ' ) here is incorrect English grammar for forming the plural of human. Should be "humans" with no apostrophe.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
humans
ACTUAL -
human's

URL OF FAULTY DOCUMENTATION :
http://docs.oracle.com/javase/7/docs/api/java/beans/BeanInfo.html#getDefaultPropertyIndex()