CODEWITHSUNDEEP
javafile-ioiotext-files
R.DM
R.DM

Reputation: 105

Outputting to a user-decided text file using method

To keep it short, I am trying to create a method which takes in as an argument a output file stream name, and then allows the user to write to that text, and append to it with a while loop. Here's what I wrote:

public void insertRowsToFile(OutputStream output) throws IOException {

    Scanner keyboard = new Scanner(System.in);
    //here is my mistake that i dont know how to solve (outputstream, boolean is undefined)
    PrintWriter out = new PrintWriter(
                          new OutputStreamWriter(
                              new FileOutputStream(output, true))); 
    boolean answer = true;
    while (answer == true) {
        System.out.println("Enter the row:");
        String entered = keyboard.nextLine();
        out.println(entered);
        System.out.println("Would you like to write more? (yes to continue)");
        String answer2 = keyboard.next();
        if (!answer2.equals("yes"))
            answer = false;
        }
    }
}

Upvotes: 0

Views: 33

Answers (1)

Nikolas
Nikolas

Reputation: 44428

Your output variable should be File instead of OutputStream.

Remember, that the constructor of FileOutputStream is legal only as the following ones:

  • new FileOutputStream(File, boolean)
  • new FileOutputStream(String, boolean)

Here is the correct method declaration:

public void insertRowsToFile(File output) throws IOException {
    ...
}

Edit, Untested: Or the better way would be keeping OutputStream as the parameter but change the initialization of the out variable:

public void insertRowsToFile(OutputStream output) throws IOException { 
    ...
    PrintWriter out = new PrintWriter(new OutputStreamWriter(output)); 
    ...
}

Edit 2: A difference between OutputStream and File classes:

  • OutputStream: Is an abstract class that accepts output bytes and sends them to some sink.
  • File: Is an class is an abstract representation of file and directory pathnames.

Source from: TutorialsPoint.com

Upvotes: 1

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