Capitalizing the letter in ArrayList using ListIterator

Question

I am trying to write a method to capitalize the first word of every element in an arraylist. So if the arraylist is:

"mary had a little lamb"

It would need to change every element to:

"Mary Had A Little Lamb"

This is the code, and this is the only way I can get it to compile. Every other way gives me an error that says that it can't convert an object to a String.

public static void capitalize(List<String> words)
{
    String str = "";
    ListIterator iter = words.listIterator();
    while (iter.hasNext())
    {
        str = iter.next() + "";
        str.toUpperCase();
        iter.set();
    }
}

Hope that was clear enough. Thanks

*Every other way* - like? – Yassin Hajaj Mar 20 '16 at 18:09 — Yassin Hajaj, Mar 20 '16 at 18:09
Do not forget to use a `ListIterator` preferably – Yassin Hajaj Mar 20 '16 at 18:12 — Yassin Hajaj, Mar 20 '16 at 18:12

ΦXocę 웃 Пepeúpa ツ · Accepted Answer · 2016-03-20T18:17:37.060

3

Since strings objects dont mutate this is not working:

str.toUpperCase();

the changes are getting done but are getting lost too

you have to do:

str = str.toUpperCase();

edited Mar 20 '16 at 18:17

answered Mar 20 '16 at 18:08

ΦXocę 웃 Пepeúpa ツ

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Wow thanks, didn't think I'd miss something that simple. – KyleAK Mar 20 '16 at 18:15
@KyleAK You may mark the answer as accepted now. :) – Yassin Hajaj Mar 20 '16 at 18:22

Capitalizing the letter in ArrayList using ListIterator

1 Answers1