In Java, a Set is part of the Java Collections Framework and is used to store unique elements . The main rule of Set: No duplicate values allowed What is a Set? A Set is a collection that: Does not allow duplicates Does not maintain index Can store null values (depends on implementation) Types of Set in Java 1. HashSet Does not maintain order Fast performance Allows one null value HashSet < String > set = new HashSet <>(); set . add ( "Apple" ); set . add ( "Banana" ); set . add ( "Apple" ); // duplicate ignored System . out . println ( set ); Enter fullscreen mode Exit fullscreen mode 2. LinkedHashSet Maintains insertion order Slightly slower than HashSet LinkedHashSet < String > set = new LinkedHashSet <>(); set . add ( "Apple" ); set . add ( "Banana" ); set . add ( "Mango" ); System . out . println ( set ); Enter fullscreen mode Exit fullscreen mode 3. TreeSet Stores elements in sorted order Uses natural sorting Does not allow null TreeSet set = new TreeSet<>(); set .…