Step to reproduce
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1) Enable JAWB <jdk-path>/bin/jabswitch -enable
2) Start JAWS
3) Start SwingSet2.jar
4) Select TableDemo from the toolbar of the SwingSet2
5) Select 'Row selection' checkbox
6) Select all the rows by the windows key combination.
Observe that all the rows in the JTable are selected.

But JAWS read the first row's first column value. I tried the same with native app 'File explorer' and JAWS reads all the rows value.

I have attached the Screen Recording of the same.

Additional information:
This works as expected on MAC OS additionally Voice over also reads how many rows are selected. This will be very much useful info for the user to know how many rows are selected.