Opening a Text File in Java

Question

In the program I am working on, I am trying to open a text file from the project folder so that I can later on read the integers from the file into an array. I am currently struggling with getting the compiler to locate the file. This is something I have done several times before, but this time around I currently am receiving an error saying that the system cannot find the file specified. The portion of the main class of my code, where the reading and writing of the file occurs, looks like this:

    if ("input".equals(input)) {
        System.out.println("Please enter the name of the input file: ");
        String filename = scanIn.nextLine();
         Scanner scanner = new Scanner(new File(filename));
        BufferedReader br = new BufferedReader(
    new InputStreamReader(new FileInputStream(filename)));
        int lineCount = 0;
        while (br.readLine() != null) {
            lineCount++;

        }

When prompted I enter sample.txt, the name of the text file in the project folder and it produces the error. Is there anything I am overlooking here that would cause this problem?

EDIT: The end goal of this is to load the integers from the file into an array, then perform Quick Sort on the array to sort it.

EDIT 2: Well in retrospect, this sounds like a very dumb error on my part, but I discovered what my problem was. Since this question has been marked as a duplicate, I can't post this as an answer so I'll post it as an edit. When creating my text file, the name of the file had become "sample.txt.txt" instead of "sample.txt" leading to the system not being able to find the file. There was no problem with the code or the filepath, just a dumb mistake on my part in naming the file.

sample.txt exists in the main directory along with the build and src files, this is where I've always put my files when reading from them before and encountered no problems — user3068177, Feb 11 '16 at 15:44
Asked and answered too many times to count. Have you at least checked the user directory to see what the file path is relative to this? — Hovercraft Full Of Eels, Feb 11 '16 at 15:47

Shravan Ramamurthy · Answer 1 · 2016-02-11T15:50:57.613

-1

You can try the below code

 ClassLoader cLoader = this.getClassLoader();
 InputStream i = cLoader.getResourceAsStream("sample.txt");

edited Feb 11 '16 at 15:50

answered Feb 11 '16 at 15:49

Shravan Ramamurthy

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OP want to read it from cmd not in code.. – SatyaTNV Feb 11 '16 at 15:50
No, I don't think OP wants to read a resource but a file... Anyway, we don't know, so this is at best a guess, i.e. not an answer. – Tunaki Feb 11 '16 at 15:51
Using the above code you can read a file which is in the same package as the class – Shravan Ramamurthy Feb 11 '16 at 15:55

Opening a Text File in Java

1 Answers1