How can I sort this ArrayList the way that I want?

Question

Here is a simple sorting program of an ArrayList:

ArrayList list = new ArrayList();

list.add(\"1_Update\");
list.add(\"11_Add\")         


        

Answer 1

Because strings are sorted in a alphabetic ordering and the underscore character is after characters for numbers. You have to provide a comparator implementing "Natural Order" to achieve desired result.