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Thread: How do you call a method from the same non-application class?

  1. #1
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    Default How do you call a method from the same non-application class?

    I have a read method that reads information from a file into an array. I have to be able to call that method to another method in that same class that uses the information in the array. I'v been stuck on this for a while now and I have no idea what to do. Any help is appreciated.


  2. #2
    Senior Member PhHein's Avatar
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    Default Re: How do you call a method from the same non-application class?

    What doesn't work? Do you get any errors/exceptions? If so post them.

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    Member Chris.Brown.SPE's Avatar
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    Default Re: How do you call a method from the same non-application class?

    Are these static methods or instance methods? Is your array global or being passed from one method to the other? Hard to determine what you are doing without seeing the code or an error.
    Writing code is your job, helping you fix and understand it is mine.

    <-- Be sure to thank and REP (Star icon) those who have helped you. They appreciate it!

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    Default Re: How do you call a method from the same non-application class?

    I'm not getting any errors because I have no idea how to even try it. I want to be able to use the read method in the display method, which displays the information of a certain student depending on what ID the method accepts.

    public void read(File input)
    {
    input = new File("Enrollment.txt");

    try
    {
    Scanner in = new Scanner(input);
    int i = 0;

    while (in.hasNextLine() && i < students.length)
    {
    fName = in.next();
    lName = in.nextLine();
    uid = in.nextLine();
    hours = in.nextInt();
    in.nextLine();
    major = in.nextLine();

    students[i] = new Student();

    i++;
    }
    }
    catch (FileNotFoundException e)
    {
    System.out.println("The file could not be found.");
    }
    }





    public void displayStudent(String unid)
    {
    String lName = getLName(), fName = getFName(), major = getMajor();
    int i = 0, hours = getHours();
    File input = new File("Enrollment.txt");
    Scanner in = null;

    try
    {
    in = new Scanner(input);

    while (in.hasNext())
    {
    if (unid.equals(uid))
    {
    System.out.println(students[i]);
    System.out.println(fName + lName + "\n" + uid + "\n"
    + hours + "\n" + major);
    }

    else
    {
    System.out.println("The UID does not exist.");
    }

    i++;
    }
    }

    catch (FileNotFoundException e)
    {
    System.out.println("The file was not found.");
    }
    }

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    Super Moderator Norm's Avatar
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    Default Re: How do you call a method from the same non-application class?

    use the read method in the display method
    To call a method in the same class, just use the method name and its args:
      theMethodToBeCalled(theArgsForTheMethod); //  call theMethodToBeCalled()

    Please edit your post and wrap your code with code tags:
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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