Text file is empty after writing to it. Getting indexOutOfBound

Question

Code is asking the user to enter itemName, price, and quantity. I see it creates a file but no string inside? Is there something wrong with the buffer? Thanks in advance,

userInput: Enter item name: item1 Enter item price $14 Enter item quantity: 3 Do you want another item? Yes(y) or No(n)n

code:

while(userInput.charAt(0)!='n'){
    System.out.print("Enter item name: ");
    itemName = kybd.nextLine();
    PrintWriter out0 = new PrintWriter(new BufferedWriter(new FileWriter("registryCopy.txt", true)));

    System.out.print("Enter item price $");
    price = kybd.nextLine();
    PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter("registryCopy.txt", true)));

    System.out.print("Enter item quantity: ");
    quantity = kybd.nextLine();
    PrintWriter out2 = new PrintWriter(new BufferedWriter(new FileWriter("registryCopy.txt", true)));


    System.out.print("Do you want another item? Yes(y) or No(n)");
    userInput= kybd.next();
    }//end of whileLoop

after editing still the same - no string inside the file:

while(userInput.charAt(0)!='n'){
        PrintWriter out0 = new PrintWriter(new BufferedWriter(new FileWriter("registryCopy.txt", true)));

    System.out.print("Enter item name: ");
    itemName = kybd.nextLine();
    out0.println(itemName);

update2: ok so it was the flush at the end out0.flush(); my output is: item1 //nextline, price // nextline, quantity // nextLine... how would I make it stay on the same line so I could later do some manipulations with the hasNext?

Update3: Getting indexOutOfBound. After sucessfull file save. I open the file to perform the following tasks: find the total costPerItem, totalCount and sum. Don't know why I'm getting out of bound. Error points out to totalCost =+ Double.parseDouble(index[1].trim()); Source code:

Scanner data = new Scanner(new File("registryCopy.txt"));

    while(data.hasNext()){
        String line = data.nextLine();
        System.out.println(line);

        String[] index = line.split("\\t");
        totalCost += Double.parseDouble(index[1].trim());
        totalCount += Integer.parseInt(index[2].trim());

        sum = totalCost/totalCount;

    }

You are not writing any data to the file.... Try using `out0.println(itemName)`. Also you don't need to create three PrintWriters — Blub, Dec 04 '13 at 23:39
out0.print(xyz) did the trick...Ok moving on to the scanner now. — user2985347, Dec 04 '13 at 23:53

score 4 · Answer 1 · edited May 23 '17 at 12:03

4

You're not writing to this:

PrintWriter out0 = new PrintWriter(new BufferedWriter(new FileWriter("registryCopy.txt", true)));

(or your other 2 writers) but merely opening it ready for writing. Trying writing to it and flushing/closing it.

Check out this SO question/answer for more info on how to write to files.

edited May 23 '17 at 12:03

Community

1
1

answered Dec 04 '13 at 23:39

Brian Agnew

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Text file is empty after writing to it. Getting indexOutOfBound

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