To introduce the add and remove operations on Sets
To introduce the union and difference operations on Sets
To develop counting duplicates application
To introduce LinkedHashSet's insertion ordering
To introduce TreeSet's red black tree implementation
10.1 INTRODUCTION
Sets are the third type of Java containers we are going to deal with in this book. Having seen Lists
and Map types, we might have observed that lists and maps allow duplicate values. However there are
many situations where we need to hold only unique elements. This is where ...
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