FileWriteDemo 4-22

Post date: Mar 5, 2014 5:02:05 PM

package filewritedemo;

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

import java.io.*;          // Needed for File and IOException

public class FileWriteDemo {

    /**

     * @param args the command line arguments

     */

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

        // TODO code application logic here

        String filename;      // Filename

        String friendName;    // Friend's name

        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();

    // Make sure the file does not exist.

    File file =new File(filename);

    if (file.exists())

    {

    System.out.println("The file=+"+filename

                     + " already exists." );

    System.exit(0);

    }

    //Open the file.

    PrintWriter outputFile=new PrintWriter(file);

    // 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 nane of friend " +

                         "number " + i + ": ");

        friendName =  keyboard.nextLine();

        // Write the name to the file.

        outputFile.println(friendName);

    }

    // Close the t i l e.

    outputFile.close();

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

    }

}