convert string to arraylist in java

Question

How to convert a String without separator to an ArrayList.

My String is like this:

String str = \"abcd...\"


        

Answer 1

If you dn not need to modify list after it created, probably the better way would be to wrap string into class implementing List<Character> interface like this:

import java.util.AbstractList;
import java.util.List;

public class StringCharacterList extends AbstractList <Character>
{
    private final String string;

    public StringCharacterList (String string)
    {
        this.string = string;
    }

    @Override
    public Character get (int index)
    {
        return Character.valueOf (string.charAt (index));
    }

    @Override
    public int size ()
    {
        return string.length ();
    }
}

And then use this class like this:

List <Character> l = new StringCharacterList ("Hello, World!");
System.out.println (l);