Python标准库附带了模块textwrap，提供简单的文本包装功能。Java标准库中是否有类似的东西？

在Python中，它大致是这样的：

>>> t = "a really really long string with lots of characters"
>>> import textwrap
>>> textwrap.wrap(t, 20)
[ a really really long ,  string with lots of ,  characters ]