CODEWITHSUNDEEP
javaio
user6346612
user6346612

Reputation:

Java output numbered line formatting

I'm working on an assignment that asks to request a file name, then take the file and output it to a .txt file with numbered line formatting like:

[001]

[002]

I have piece milled code together to get the program to work but I can't seem to get it to write in the requested format. Any help would be appreciated.

Here is my code so far.

    try {

        System.out.println("Enter your source code file name: ");
        Scanner scanner = new Scanner(System.in);
        String file = scanner.nextLine();

        in = new FileInputStream(file);
        out = new FileOutputStream(file + ".txt");

        int c;
        while ((c = in.read()) != -1) {
            out.write(c);
        }

    } catch (IOException e) {
        System.out.println("Error!");

    }

Upvotes: 0

Views: 63

Answers (2)

ZeusNet
ZeusNet

Reputation: 720

You only need a counter to count your rows:

BufferedReader in = new BufferedReader(new FileReader(fileName));
BufferedWriter out = new BufferedWriter(new FileWriter(fileName + '.txt');
String line;
while ((line = in.read()) != -1) {
     counter++;
     out.write(String.format(..., counter, line)+"\r\n");
}

For additional information on the String.format() method look at this link

Upvotes: 2

theVoid
theVoid

Reputation: 743

Try to use BufferedReader/BufferedWriter to read and write the lines of your text easier like this:

    String txtName = "test";
    String txtNumbered = "test1";
    try
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(txtName+".txt")));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter( new FileOutputStream(txtNumbered+".txt")));
        int count = 0;

        String line = br.readLine();
        while(line != null)
        {
            count++;
            bw.write(count+" "+line+"\r\n");
            line = br.readLine();
        }

        br.close();
        bw.close();

    }catch(IOException e)
    {
        System.out.println(e);
    }

Upvotes: 1

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