I want to use Buffered Writer using Jmenu function, but there is an error

I think it would have been good if you could explain what kind of errors were madeten thousand I think it's because the I/O library part is not imported as I tried it myself.

I think you can add the phrase below below the phrase of the package on the top.

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;