This will slow down disk I/O.
The next example program writes
to a disk file named by the user.
The trim()
method removes leading
and trailing spaces from the user data.
Two try{}
blocks are
used.
The first catches errors in creating the file;
the second catches errors in writing data to it.
import java.io.*; import java.util.Scanner; class CreateFile { public static void main ( String[] args ) { // Get filename and create the file FileWriter writer = null; Scanner scan = new Scanner( System.in ); String fileName = ""; System.out.print("Enter Filename-->"); // Ask for the file name try { fileName = scan.next(); // Get the file name writer = new FileWriter( fileName ); // Create the file } catch ( IOException iox ) { System.out.println("Error in creating file"); // On failure, write error message return; // Return } // Write the file. try { writer.write( "Behold her, single in the field,\n" ); // Write text to the file writer.write( "Yon solitary Highland Lass!\n" ); writer.write( "Reaping and singing by herself;\n" ); writer.write( "Stop here, or gently pass!\n" ); writer.close(); // Close the file } catch ( IOException iox ) { System.out.println("Problem writing " + fileName ); // On failure, write error message } } }
What happens (in this program) if the close()
method fails?