Populate Array of type Double from text file

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  • bmbuke
    New Member
    • Jan 2012
    • 2

    Populate Array of type Double from text file

    Hi everyone. This is my first time posting to this forum and I am only about 9 weeks into java programming so I am still learining a lot!

    My primary issue is I need to know how to fill an array of type double with values read from a text file.

    Update 1.20.12 - So I have made some good progress and now here is what I need help with. In my variable declarations at the beginning of my file I have declared this double array
    Code:
    double[] interest = {5.35, 5.5, 5.75};
    When I get this working properly I know that I will be needing to remove the values from this array so that the text file can populate them, but for testing purposes they are in there.

    Next, I have successfully been able to read my text file and to output that to the console window using the following:
    Code:
     
    try{
        FileInputStream fstream = new FileInputStream("InterestFromFile.txt");
        DataInputStream in = new DataInputStream(fstream);
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        String strLine;
            while ((strLine = br.readLine()) != null)   {
                   System.out.println (strLine);
             }
         in.close();
         }catch (Exception e){//Catch exception if any
         System.err.println("Error: " + e.getMessage());
         }
    So what I am guessing is that instead of using System.out.prin tln (strLine) to print the contents of the text file to the console window, I will need to change that line to somehow fill the interest[] array that I have already declared earlier, but I don't know how to do that.

    Again, thanks ahead of time for your help!
    Last edited by bmbuke; Jan 20 '12, 05:20 PM. Reason: Stripped down question and updated with progress and code snippets.
  • bmbuke
    New Member
    • Jan 2012
    • 2

    #2
    Anyone have any ideas? I could really use some help.

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