Read CSV file column by column

Question

I want to read specific columns from a multi column csv file and print those columns in other csv file using Java. Any help please? Following is my code to print each token

Answer 1

Finds all files in folder and write that data to ArrayList row.

Initialize

ArrayList> row=new ArrayList>();
BufferedReader br=null;

For Accessing row

for(ArrayList data:row){
data.get(col no); 
}
or row.get(0).get(0) // getting first row first col

Functions that reads all files from folders and concatenate them row.

static void readData(){
String path="C:\\Users\\Galaxy Computers\\Desktop\\Java project\\Nasdaq\\";
File files=new File(path);
String[] list=files.list();

try {
        String sCurrentLine;
       char check;
       for(String filename:list){ 
        br = new BufferedReader(new FileReader(path+filename));
        br.readLine();//If file contains uneccessary first line.
        while ((sCurrentLine = br.readLine()) != null) {

           row.add(splitLine(sCurrentLine));
        }
        }
        }

    } catch (IOException e) {
        e.printStackTrace();
    } 
        try {
            if (br != null)br.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }


   static ArrayList splitLine(String line){
   String[] ar=line.split(",");
   ArrayList d=new ArrayList();
   for(String data:ar){
    d.add(data);
   }

   return d; 
   }