Selenium automation testing course with Java- HashSet, LinkedHashSet and TreeSet - class 24
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In the Java Collection Framework, the Set interface is a part of the java.util package and represents a collection of unique elements — that is, it does not allow duplicate values.
Key Characteristics of a Set:
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No duplicates: A Set cannot contain duplicate elements.
Unordered (in general): The order of elements is not guaranteed (except for specific implementations).
Allows at most one null element (depends on implementation, like HashSet allows one null).
Common Methods:-
boolean add(E e); // Adds element if not already present
boolean remove(Object o); // Removes specified element
boolean contains(Object o); // Checks if element exists
int size(); // Returns number of elements
void clear(); // Removes all elements
boolean isEmpty(); // Checks if set is empty