End a filename after a certain character?

I'm trying to write a script to end the filename after a specific character, ")" in this case, but I haven't written Java in over 10 years.. Anyone willing to assist?

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You don't need to use scripting - a Replace method with a Regular Expression will achieve this.

Replace: (.*?\))(.*)
with: \1

This will truncate the filename after the first occurrence of ")"
If you omit the "?" then the first "*" quantifier will be "greedy" and a filename containing more than one ")" will be truncated after the final ")".

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