Three ways to traverse a list object in Java

1. Enhanced for Loop

 for (String str:list) {//Its internal is essentially a call to the iterator traversal mode, which has other limitations, not recommended.     System.out.println (str);}

2. Normal for loop

 for int i = 0; I < list.size (); i++) {//internal not locked, the most efficient, but in multithreading to consider the problem of concurrent operations.     System.out.println (List.get (i));

3. Iterator traversal

iterator<string> iter = list.iterator ();  while  data locking is performed during execution, performance is slightly poor, and if an element is removed during the loop, only the Iter.remove () method can be called.     System.out.println (Iter.next ());}

Three ways to traverse a list object in Java