Returns a string representation of this collection. The string
representation consists of a list of the collection's elements in the
order they are returned by its iterator, enclosed in square brackets
({@code "[]"}). Adjacent elements are separated by the characters
{@code ", "} (comma and space). Elements are converted to strings as
by {@link string#valueOf(Object)}.
@return a string representation of this collection
Returns a string representation of this collection. The string representation consists of a list of the collection's elements in the order they are returned by its iterator, enclosed in square brackets ({@code "[]"}). Adjacent elements are separated by the characters {@code ", "} (comma and space). Elements are converted to strings as by {@link string#valueOf(Object)}.
@return a string representation of this collection