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Iterate Over Unmodifiable Collection

  1. import java.util.ArrayList;
  2. import java.util.Collection;
  3. import java.util.Collections;
  4. import java.util.Iterator;
  5. import java.util.List;
  6.  
  7. public class UnmodifiableCollection {
  8.  
  9.   public static void main(String args[]) {
  10.     List<String> list = new ArrayList<String>();
  11.  
  12.     list.add("This");
  13.     list.add("is");
  14.     list.add("Unmodifiable Collection");
  15.  
  16.     System.out.println("Element added to list: " + list.get(2));
  17.  
  18.     Collection<String> immutableCol = Collections.unmodifiableCollection(list);
  19.  
  20.     Iterator<String> iterator = immutableCol.iterator();
  21.  
  22.     while(iterator.hasNext())
  23.     {
  24.        System.out.println(iterator.next());
  25.     }
  26.   }
  27. }