How can you find out whether anything in a table's been selected?

How can you find out is there anything(a cell or a row) in a table's been selected???
it's doesn't matter which cell or which row's been selected in a table, but just to know is there anything been selected
I can't figure out the code to do that >.<
is there anything to do with
bookTable.getCellEditor()?

How can you find out is there anything(a cell or a row) in a table's been selected???
it's doesn't matter which cell or which row's been selected in a table, but just to know is there anything been selected
I can't figure out the code to do that >.<
is there anything to do with
bookTable.getCellEditor()?

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