How to add element in List while iterating in java?

Question

Say I have a List like:

List list = new ArrayList<>();
list.add(\"a\");
list.add(\"h\");
list.add(\"f\");
list.add(\"s\");

Answer 1

Iterate through a copy of the list and add new elements to the original list.

for (String s : new ArrayList(list))     
{
    list.add("u");
}

See How to make a copy of ArrayList object which is type of List?