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  1.  
  2. import java.util.Iterator;
  3. import java.util.List;
  4. import java.util.Map;
  5. import java.util.concurrent.ConcurrentHashMap;
  6. import java.util.concurrent.CopyOnWriteArrayList;
  7.  
  8.  class ThreadSafeIteratorExample {
  9.  
  10. 	public static void main(String[] args) {
  11.  
  12. 		List<String> myList = new CopyOnWriteArrayList<String>();
  13.  
  14. 		myList.add("1");
  15. 		myList.add("2");
  16. 		myList.add("3");
  17. 		myList.add("4");
  18. 		myList.add("5");
  19.  
  20. 		Iterator<String> it = myList.iterator();
  21. 		while(it.hasNext()){
  22. 			String value = it.next();
  23. 			System.out.println("List Value:"+value);
  24. 			if(value.equals("3")){
  25. 				myList.remove("4");
  26. 				myList.add("6");
  27. 				myList.add("7");
  28. 			}
  29. 		}
  30. 		System.out.println("List Size:"+myList.size());
  31.  
  32. 		Map<String,String> myMap = new ConcurrentHashMap<String,String>();
  33. 		myMap.put("1", "1");
  34. 		myMap.put("2", "2");
  35. 		myMap.put("3", "3");
  36.  
  37. 		Iterator<String> it1 = myMap.keySet().iterator();
  38. 		while(it1.hasNext()){
  39. 			String key = it1.next();
  40. 			System.out.println("Map Value:"+myMap.get(key));
  41. 			if(key.equals("1")){
  42. 				myMap.remove("3");
  43. 				myMap.put("4", "4");
  44. 				myMap.put("5", "5");
  45. 			}
  46. 		}
  47.  
  48. 		System.out.println("Map Size:"+myMap.size());
  49. 	}
  50.  
  51. }
Success #stdin #stdout 0.04s 4386816KB
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stdin
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Standard input is empty
stdout
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List Value:1
List Value:2
List Value:3
List Value:4
List Value:5
List Size:6
Map Value:1
Map Value:2
Map Value:4
Map Value:5
Map Size:4
https://ideone.com/92a0xJ
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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