List<String> list = new ArrayList<String>();

         list.add("java");

         list.add("hello");

         list.add("se");

         list.add("ee");

 for (int i = ; i < list.size(); i++) {

             String s = (String)list.get(i);

             System.out.println(s);

         }

 java

 hello

 se

 ee

 for (String s : list) {

             System.out.println(s);

         }

 java

 hello

 se

 ee

 Iterator it = list.iterator();

         while (it.hasNext()) {

             System.out.println(it.next());

         }

 java

 hello

 se

 ee