How to write an ArrayList of Strings into a text file?

Asked 2011-07-01T12:48:12.507

I want to write an ArrayList<String> into a text file.

The ArrayList is created with the code:

ArrayList arr = new ArrayList();

StringTokenizer st = new StringTokenizer(
    line, ":Mode set - Out of Service In Service");

while(st.hasMoreTokens()){
    arr.add(st.nextToken());    
}

java arraylist

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1 Answer

If you want to serialize the ArrayList object to a file so you can read it back in again later use ObjectOuputStream/ObjectInputStream writeObject()/readObject() since ArrayList implements Serializable. It's not clear to me from your question if you want to do this or just write each individual item. If so then Andrey's answer will do that.

answered 2011-07-01T12:57:15.180

How to write an ArrayList of Strings into a text file?

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