If you invoke JHAT -donationware you get this message:

HAT is "donationware." If you use and enjoy this program, please consider
making a donation to a charity. Please see DONATIONS.html
in the doc directory for more information.

but donations.html is missing from the JDK installation.
There is another (unrelated) typo in help message:

 JHAT -? outputs:

-stack false: Turn off tracking object allocatoin call stack.

notice the typo. "allocatoin" should read "allocation".