Question

OK.first i realized that readAll() saved the tokenized String in array index from 0 until it sees the newline char(next row of a csv file) and start again from 0.I want the tokenized String saved in a continuous array.

import au.com.bytecode.opencsv.CSVReader;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.List;

public class ReadTest {


    private static String data0 = "U:\\test-csv1.csv";
    private static String [] longArray = new String[50];
    private static String[] aString;
    private static List<String> longStr = new java.util.ArrayList<String>();
    private static int arrayCtr = 0;

    private static  void copyArray(String aTemp){

        longStr.add(arrayCtr, aTemp);
        System.out.println(arrayCtr);
        arrayCtr++;
        }

    private static void printElements(){

        for(int no =15;no<= 25;no++)
        System.out.print("\nelNo "+no+" is: "+longStr.get(no));
        System.out.println();
    }

    public static void main(String[] args) throws IOException {


    CSVReader reader1 = new CSVReader(new FileReader(data0),';');
    List aList;



        while ((aList = reader1.readAll())!= null){
            int outer= 0;
            String aTemp;
            String [] longArray = new String[50];

so here i make a loop to copy the tokenized String to be copied into a List called longStr.

            for (int counter= 0;counter <aList.size();counter++){
                String [] tempStr = (String[]) aList.get(counter);
                for (int j = 0; j < tempStr.length; j++){

                    aTemp = tempStr[j];
                    copyArray(aTemp);
                //  System.out.print(tempStr[j]);
                //  System.out.println();
                    System.out.print("strNo: " + j+"="+tempStr[j] + " "+"\n");
                    System.out.print("TEMP="+aTemp+"\n");


                }

this is a counter to obtain the num of row.

                System.out.println("loop for no. of element:"+(++outer));
                System.out.println();


                        printElements();
            }

printElements is a method to list down the elements in longStr.

I am having a problem in listing all the elements in longStr. This is what I have so far, I tried to arrange tokenized String from readAll() into continuous array as in longStr. When I tried to print out the elements after readAll() finished reading the csv file, it continuously print the elements from printElements() ie nonstop. How do I solve this, and where can I put the printElements() other than inside the while? I always get error like indexoutofbound if I place it somewhere else.

Answer 1

I think

while ((aList = reader1.readAll())!= null){

is an endless loop. try

if((aList = reader1.readAll())!= null){