This activity will be about ArrayList, HashSet, and HashMap implementation. 1st Activity implement an ArrayList and HashSet Ask for user input 5 times, and then add the values into the ArrayList and ...

Java Collection means a single unit of objects. Java Collection framework provides many interfaces (Set, List, Queue, Deque) and classes (ArrayList, Vector, LinkedList, PriorityQueue, HashSet, ...

It’s easy to remove duplicates from a list in Java. There are a variety of functions in Java that simplify that process. Finding duplicates in a Java list? That’s actually a bit more complicated, but ...