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The only European country with a declining population in the nineteenth century was
TreeSet< T >
A navigable set implementation based on a Red-Black tree, which stores its elements in sorted, ascending order.
Boolean
Refers to a primitive data type that has only two possible values: true or false.
Data Structure
A data structure is a particular way of organizing and storing data in a computer so that it can be used efficiently.
Collection
In programming, a collection is an object that groups multiple elements into a single unit. Collections are used to store, retrieve, manipulate, and communicate aggregate data.