Question

This is a homework assignment, I have to write a program that reads a “input.txt” file and sees how many times to print a salutation (ex: Donald Duck, 4 so it prints Hello Donald Duck four times)
The problem I’m having is with outputting the salutation into a text file called “output.txt”
For some reason it only prints out the salutation for the last line in the input.txt instead of all of them.. Here’s what I have so far:

   import java.util.*;
   import java.io.*;

   public class Driver0 {

      public static void main (String [] args) {
         Scanner userInput = new Scanner(System.in);
         System.out.println("Would you like the output to be written to a file?");
         Scanner read;
         String input = userInput.nextLine(); //user input
         if(input.equals("yes")) {
            System.out.println("Writing to \"output.txt\" now..");
         }
         else {
            System.out.println("Printing to screen:"); 
         }        
            try {
            read = new Scanner(new File("input.txt")); //scanner reading file
            } 
            catch (FileNotFoundException e){
               System.out.println("File not found.");
               return;
            }
         while(read.hasNextLine()) {
            String newInput = read.nextLine();
            String [] inputArray = newInput.split(","); //spliting
            int num = 0;
            num = Integer.parseInt(inputArray[2].trim());
                for(int i = 0; i < num; i++) {
                if(input.equals("yes")) {  //writing to file 
                    Driver0.outputting(inputArray);
                  }
               else { //writing to screen
                  System.out.println("Hello" + inputArray[1] + inputArray[0]); 
               }
            } 
         }
      }
      public static void outputting (String [] inputArray) {
         PrintWriter output = null;
         String fileName = "output.txt";
            try {
            output = new PrintWriter(new FileWriter(fileName)); 
            } 
            catch(IOException error){
               System.out.println("Sorry, can't open for writing.");
               return;
            }
            output.println("Hello" + inputArray[1] + inputArray[0]);
                output.close();       
      } 
   }

My problem is most likely within the outputting method or where it has a comment that says writing to file next to it

Answer 1

The FileWriter class has a second constructor that takes a boolean argument to tell it to append to the end of the existing file rather than overwrite it from the start.

output = new PrintWriter(new FileWriter(fileName, true));