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Thread: Reading from a text file and storing in arrayList

  1. #1
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    Default Reading from a text file and storing in arrayList

    Hi everybody

    I have wrriten a code to save data from a text file into any array list. I am using array list for the first time. I have used only array before. In the text file I have data that is seperated by comma , I need each element to be stored in a seperate array position that is .....

    1,10,0,0,3,2

    in the above line number one should be stored in array position 1,1......number 10 should be stored in array position 1,2...like a two dimensional array.....here is my code...

    package heuristic;
    import java.io.*;
    import java.util.Scanner;
    import java.text.*;
    import java.util.ArrayList;
    /**
     *
     * @author bharathwaj
     */
    public class greedyAlgorithm {
     
        /**
         * @param args the command line arguments
         */
        public static void main(String[] args) throws IOException
        {
            // Declarations
          ArrayList<String> patientDetails = new ArrayList<String>();
     
           int number;
     
          readPatientDetails(patientDetails,"patientdetails.txt");
     
          printArray(patientDetails,9);
     
        }
     
        public static void readPatientDetails(ArrayList<String>patientDetails, String fileName)throws IOException
        {
     
            File inFile = new File(fileName);
            String line;
     
            if (!inFile.exists())
            {
                System.out.println("Cannot find " + fileName);
                System.exit(0);
            }
            Scanner myFile = new Scanner(inFile);
           int count = 0;
     
            for(int i = 0; myFile.hasNext(); i = i+1)
            {
     
                {
                patientDetails.add(myFile.nextLine());
     
                count ++;
                }
     
            }
            myFile.close();
     
        }
     
     public static void printArray(ArrayList<String>patientDetails, int numValues)
        {
     
            for (int i = 0; i < numValues; i++)
            {
                System.out.println(patientDetails);
     
            }   
     
     
    }
    }
    Attached Files Attached Files


  2. #2
    Member Truffy's Avatar
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    Default Re: Reading from a text file and storing in arrayList

    Quote Originally Posted by nynamyna View Post
    Hi everybody

    I have wrriten a code to save data from a text file into any array list. I am using array list for the first time. I have used only array before. In the text file I have data that is seperated by comma , I need each element to be stored in a seperate array position that is .....

    1,10,0,0,3,2

    in the above line number one should be stored in array position 1,1......number 10 should be stored in array position 1,2...like a two dimensional array.....here is my code...

    package heuristic;
    import java.io.*;
    import java.util.Scanner;
    import java.text.*;
    import java.util.ArrayList;
    /**
     *
     * @author bharathwaj
     */
    public class greedyAlgorithm {
     
        /**
         * @param args the command line arguments
         */
        public static void main(String[] args) throws IOException
        {
            // Declarations
          ArrayList<String> patientDetails = new ArrayList<String>();
     
           int number;
     
          readPatientDetails(patientDetails,"patientdetails.txt");
     
          printArray(patientDetails,9);
     
        }
     
        public static void readPatientDetails(ArrayList<String>patientDetails, String fileName)throws IOException
        {
     
            File inFile = new File(fileName);
            String line;
     
            if (!inFile.exists())
            {
                System.out.println("Cannot find " + fileName);
                System.exit(0);
            }
            Scanner myFile = new Scanner(inFile);
           int count = 0;
     
            for(int i = 0; myFile.hasNext(); i = i+1)
            {
     
                {
                patientDetails.add(myFile.nextLine());
     
                count ++;
                }
     
            }
            myFile.close();
     
        }
     
     public static void printArray(ArrayList<String>patientDetails, int numValues)
        {
     
            for (int i = 0; i < numValues; i++)
            {
                System.out.println(patientDetails);
     
            }   
     
     
    }
    }
    hi sorry, i didnt get your point.
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]
    [ 1,10,0,0,3,2, 2,14,0,0,3,3, 3,9,0,0,2,1, 4,15,0,0,2,1, 5,11,0,0,2,3, 6,12,0,0,3,5, 7,15,0,0,3,5, 8,11,0,0,2,2, 9,15,0,0,3,4, 10,14,0,0,2,4]

    is that you want to achieve?

  3. #3
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    Default Re: Reading from a text file and storing in arrayList

    Hi Truffy

    Thank you for the help......I already finished doing that......Thank you very much

    Bharath

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