Iterate through a Collection using Java Iterator Example

/*
Iterate through a Collection using Java Iterator Example
This Java Example shows how to iterate through a Collection using Java Iterator.
*/
import java.util.Iterator;
import java.util.ArrayList;
public class JavaIteratorExample {
public static void main(String[] args) {
//create an ArrayList object
ArrayList aList = new ArrayList();
//populate ArrayList object
aList.add("1");
aList.add("2");
aList.add("3");
aList.add("4");
aList.add("5");
/*
Get Iterator object by invoking iterator method of collection.
Iterator provides hasNext() method which returns true if has more
elements. next() method returns the element in iteration.
*/
Iterator itr = aList.iterator();
//iterate through the ArrayList values using Iterator's hasNext and next methods
while(itr.hasNext())
System.out.println(itr.next());
/*
Please note that next method may throw a java.util.NoSuchElementException
if iteration has no more elements.
*/
}
}
/*
Output would be
1
2
3
4
5
*/