How to separate String values and object type values from object arraylist

Question

I have an arraylist

private ArrayList<Object> myList = new Arraylist<>()

This arraylist contains String values and SongInfoModel(object) values.

How to retrieve these two into their respective arraylists?

private ArrayList<SongInfoModel> songList = new Arraylist<>()

private ArrayList<String> path= new Arraylist<>()

I'm using below given code, but it is giving me error in the "add" statement

for(Object ob: myList){

        if(ob instanceof SongInfoModel)  {

            songList.add(ob); //error
        }else if(ob instanceof String){

            path.add(ob); //error
        }
    }

I know this is a noobish question, but please help me!

It might help posting (or reading if you haven't done so yet) the error. Also, are your lists named correctly? You use SongList once and songList the second time. Similarly, PathName and path seemingly interchangeably — lucidbrot
– lucidbrot, Commented Dec 27, 2017 at 15:18

fab · Accepted Answer · 2017-12-27 15:19:14Z

2

You need to cast the Objects:

for(Object ob: myList){

        if(ob instanceof SongInfoModel)  {

            songList.add((SongInfoModel)ob); //<--
        }else if(ob instanceof String){

            path.add((String)ob); //<--
        }
    }

answered Dec 27, 2017 at 15:19

fab

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