No. There are ways to deal with this problem covered in the chapter on exception handling.
Here is an example run of the program:
C:\Temp\>java NamedFileInput File Name: myData.txt The square of 1 is 1 The square of 2 is 4 The square of 3 is 9 The square of 10 is 100 The square of 11 is 121 The square of 12 is 144 The square of 13 is 169 The square of 23 is 529 The square of 45 is 2025 The square of 67 is 4489 C:\Temp\>
The user entered several spaces before the file name,
but the trim() method took care of them.
If this had not been done, the spaces would have been
included as part of the file name and the file would
not be found, resulting in a non-graceful termination
of the program.
Is it ever useful to send output to a disk file?