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import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.Iterator; import java.util.List; public class UnmodifiableCollection { public static void main(String args[]) { List<String> list = new ArrayList<String>(); list.add("This"); list.add("is"); list.add("Unmodifiable Collection"); System.out.println("Element added to list: " + list.get(2)); Collection<String> immutableCol = Collections.unmodifiableCollection(list); Iterator<String> iterator = immutableCol.iterator(); while(iterator.hasNext()) { System.out.println(iterator.next()); } } } |
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