4-17 FileWriteDemo

Post date: Mar 5, 2014 9:05:41 AM

//This program writes data to a file.

package filewritedemo;

import java.util.Scanner;// Needed tor Scanner class

import java.io.*;                 // Needed for File I/O classes

public class FileWriteDemo 

{

    public static void main(String[] args)throws IOException 

    {

            String filename;         // File name

            String friendName;   // Friend's

            int numFriends;          // Number of friends

            // Create a Scanner object for keyboard input.

            Scanner keyboard = new Scanner(System.in);

            // Get the number of friends.

            System.out.print("How many friends do you have? " );

            numFriends = keyboard.nextInt();

            // Consume the remaining newline character.

            keyboard.nextLine();

            // Get the filename.

            System.out.print("Enter the filename: " );

            filename = keyboard.nextLine();

            // Open the file.

            PrintWriter outputFile = new PrintWriter(filename);

            // Get data and write it to the file.

            for (int i = 1;i<=numFriends; i++)

            {

            // Get the name of a friend.

            System.out.print("Enter the name of friend number " + i + ":");

            friendName = keyboard.nextLine();

            // Write the name to the file.

            outputFile.println(friendName);

            }

            // Close the file.

            outputFile.close();

            System.out.println("Data written to the file . " );

    }

}