Đọc dữ liệu từ ArrayList bằng Iterator trong Java - Iterator ArrayList Java

Iterator ArrayList

Java 2016

package Demo22;
import java.util.*;

public class IteratorFailFastTest {
   public void runIteratorAsList() {
      List < String > listNames = Arrays.asList("Tom", "Joe", "Bill", "Dave", "John");
      Iterator < String > iterator = listNames.iterator();

      while (iterator.hasNext()) {
         String nextName = iterator.next();
         System.out.println(nextName);
      }
   }

   public void runIteratorList() {
      List < String > listNames = new ArrayList();
      listNames.add("Tom");
      listNames.add("Joe");
      listNames.add("Bill");
      listNames.add("Dave");
      listNames.add("John");

      Iterator < String > iterator = listNames.iterator();

      while (iterator.hasNext()) {
         String nextName = iterator.next();
         System.out.println(nextName);
      }
   }

   public static void main(String[] args) {
      IteratorFailFastTest tester = new IteratorFailFastTest();
      tester.runIteratorAsList();
      tester.runIteratorList();
   }
}