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import java.util.*; public class CollectionsUnmodifiableSetExample2 { public static void main(String[] args) { Set<String> set = new TreeSet<>(); Collections.addAll(set, "Google", "Facebook", "Instagram"); System.out.println("Initial Set: " + set); Set<String> set2 = Collections.unmodifiableSet(set); System.out.println("Unmodifiable Set: " + set2); //Modifying the original set set.add("Twitter"); System.out.println("Unmodifiable Set: " + set2); } }
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