how split elements of ArrayList?

Question

I have ArrayList. I need split each element of this ArrayList by "," and as result got ArrayList<ArrayList<String>>. How to do it properly? This is code I have tried:

ArrayList<ArrayList<String>> list = new ArrayList<ArrayList<String>>();
   try {
    ArrayList<String> lines = rf.readLines(filename);         
        for (int i = 0; i<=lines.size(); i++){
            String[] items = lines.get(i).split(",");
        }
    }  
    catch(IOException e)  
    {   
        System.out.println("Unable to create "+filename+": "+e.getMessage());                
    }

Now you only need to move the String[] into an ArrayList<String>. You can use the Arrays#asList method to continue solving your problem. — Luiggi Mendoza
– Luiggi Mendoza, Commented Feb 9, 2013 at 14:42
Your question is not clear - I lost your meaning at "...as as result got ArrayList>." You do not define what you mean by "do it properly". Expand, let us know if you're getting an error and what it is, be sure to define the output you want. — arcy
– arcy, Commented Feb 9, 2013 at 14:42

Stephen C · Accepted Answer · 2013-02-09 14:47:28Z

4

You need to convert the line array into an ArrayList and add that to list. This should do the trick.

list.add(new ArrayList<String>(Arrays.asList(items)));

answered Feb 9, 2013 at 14:47

Stephen C

723k95 gold badges849 silver badges1.3k bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

JB Nizet Over a year ago

Yep. Or he could also build an ArrayList<List<String>>, and directly store the result of Arrays.asList(items).

Collectives™ on Stack Overflow

how split elements of ArrayList?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related