CODEWITHSUNDEEP
javaarraysfiletextarraylist
user3781288
user3781288

Reputation: 1

Splitting ArrayLists into Multiple ArrayLists

I was wondering how I could split the following data into multiple lists. Here's my input (from a text file, sample recreated here):

aaaa bbbb cccc,ccc,cccc

aaaa-- bbbb

aaaa bbbb cccc-

aaaa bbbb cccc,ccc

aaaa-

aaaa bbbb ccc,cccc,cccc

Seperating each section of text is a blank space. The code I need to make should create three lists, composed of the a, b, and c groups of each entry from the text file with respect to each line, while ignoring any line with the "-". So, my 3 arrays should be filled as follows:

Array1: aaaa, aaaa, aaaa
Array2: bbbb, bbbb, bbbb
Array3: (cccc,ccc,cccc),(cccc,ccc),(ccc,cccc,cccc)

Parenthesis were added to show that the third Array should include all the listed c values a,b, and c all contain strings imported from text files. Here's my code so far:

import java.util.*;
import java.io.*;

public class SEED{

public static void main (String [] args){

    try{

        BufferedReader in = new BufferedReader(new FileReader("Curated.txt"));
        String temp;
        String dash = "-";
        int x = 0;
        List<String> list = new ArrayList<String>();
        List<String> names = new ArrayList<String>();
        List<String> syn = new ArrayList<String>();
        List<String> id = new ArrayList<String>();


        while((temp = in.readLine()) != null){

            if(!(temp.contains(dash))){

                list.add(temp);

                if(temp.contains(" ")){

                    String [] temp2 = temp.split(" ");
                    names.add(temp2[0]);
                    syn.add(temp2[1]);
                    id.add(temp2[2]);

                }else{

                    System.out.println(temp);

                }//Close if

                System.out.println(names.get(x));
                System.out.println(syn.get(x));
                System.out.println(id.get(x));

            x++;


            }//Close if


        }//Close while

    }catch (Exception e){

e.printStackTrace();
        System.exit(99);

    }//Close try

}//Close main

}//Close class

But my output is always: nothing. How could I save these values to 3 separate Arrays or ArrayLists properly?

Upvotes: 0

Views: 262

Answers (2)

Chase Rocker
Chase Rocker

Reputation: 1908

You're referencing list.get(x), but your x++ and your list.add won't be in synch if you read a line with no dash. So (x) won't be the correct reference.

Why are you doing:

String [] temp2 = list.get(x).split(" ");

Instead of:

String [] temp2 = temp.split(" ");

EDIT

Try:

if(!(temp.contains(dash))){

            list.add(temp);

            if(temp.contains(" ")){

                String [] temp2 = temp.split(" ");
                names.add(temp2[0]);
                syn.add(temp2[1]);
                id.add(temp2[2]);
            }else{

                System.out.println(temp);

            }//Close if

        }//Close if

for(int x = 0; x < names.size(); x++) {

            System.out.println(names.get(x));
            System.out.println(syn.get(x));
            System.out.println(id.get(x));
}

Upvotes: 1

Alexandre Santos
Alexandre Santos

Reputation: 8338

Probably an exception is being thrown and your are ignoring it.

Change your catch to 

}catch (Exception e){
    e.printStackTrace();
    System.exit(99);

}//Close try

Upvotes: 0

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