In this example we shall show you how to obtain an ArrayList Iterator, that is an iterator over the elements of the ArrayList. To obtain an ArrayList Iterator one should perform the following steps:
- Create a new ArrayList.
- Populate the arrayList with elements, using
add(E e)API method of ArrayList. - Use
iterator()API method to obtain the Iterator of the arrayList elements. - Iterate through the arrayList elements, using
hasNext()andnext()API methods of Iterator,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.util.ArrayList;
import java.util.Iterator;
public class ArrayListIteratorExample {
public static void main(String[] args) {
// Create an ArrayList and populate it with elements
ArrayList arrayList = new ArrayList();
arrayList.add("element_1");
arrayList.add("element_2");
arrayList.add("element_3");
arrayList.add("element_4");
arrayList.add("element_5");
// The Iterator object is obtained using iterator() method
Iterator it = arrayList.iterator();
// To iterate through the elements of the collection we can use hasNext() and next() methods of Iterator
System.out.println("ArrayList elements :");
while(it.hasNext())
System.out.println(it.next());
}
}
Output:
ArrayList elements :
element_1
element_2
element_3
element_4
element_5
This was an example of how to obtain an ArrayList Iterator in Java.
