Collections.sort is not sorting anything

Question

I'm trying to sort a String array in a short, simple way. I'm trying to use Collections.sort, but I don't understand why it doesn't sort anything. Code:

public static String[] FishNamesSorted;
.....
List<String> nameslist = new ArrayList<String>();
nameslist.toArray(FishNamesSorted);
Collections.sort(nameslist, String.CASE_INSENSITIVE_ORDER); <--- NOT WORKING

Collections.sort(nameslist, new Comparator<String>() { <--- NOT WORKING
    @Override
    public int compare(String p1, String p2) {
    if (p1 == null) {
        return 1;
    }
    if (p2 == null) {
        return -1;
    }
    return p1.compareToIgnoreCase(p2);
    }
});

Results in both cases:

• Poecilia Latipinna
• Poecilia Reticulata
• Notropis Chrosomus
• Pseudomugil Gertrudae
• ....

Whyyyy?

Answer 1

Collections.sort(list) definitely works. The problem in your code is you placed the list into the array before sorting. The array should be sorted if you sort your list first before putting it to the array

List<String> nameslist = new ArrayList<String>();

/* add elements to namesList */

Collections.sort(nameslist);
Object[] fishNamesSorted = nameslist.toArray();

Answer 2

The solution was

Arrays.sort(FishNamesSorted, String.CASE_INSENSITIVE_ORDER)

I had misunderstood how it works