The iterator() method of java.util.AbstractList class is used to return an iterator over the elements in this list in proper sequence.
This implementation returns a straightforward implementation of the iterator interface, relying on the backing list’s size(), get(int), and remove(int) methods.
Syntax:
public Iterator iterator()
Returns Value: This method returns an iterator over the elements in this list in proper sequence.
Below are the examples to illustrate the iterator() method.
Example 1:
// Java program to demonstrate// iterator() method// for Integer value import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // Creating object of AbstractList<Integer> AbstractList<Integer> arrlist1 = new ArrayList<Integer>(); // Populating arrlist1 arrlist1.add(10); arrlist1.add(20); arrlist1.add(30); arrlist1.add(40); arrlist1.add(50); // print arrlist1 System.out.println("ArrayList : " + arrlist1); // creating object of Iterator // using iterator() method Iterator it = arrlist1.iterator(); // printing the iterated value while (it.hasNext()) { System.out.println("Value is : " + it.next()); } } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
ArrayList : [10, 20, 30, 40, 50] Value is : 10 Value is : 20 Value is : 30 Value is : 40 Value is : 50
Example 2:
// Java program to demonstrate// iterator() method// for String value import java.util.*; public class GFG1 { public static void main(String[] argv) throws Exception { try { // Creating object of AbstractList<String> AbstractList<String> arrlist1 = new ArrayList<String>(); // Populating arrlist1 arrlist1.add("A"); arrlist1.add("B"); arrlist1.add("C"); arrlist1.add("D"); arrlist1.add("E"); // print arrlist1 System.out.println("ArrayList : " + arrlist1); // creating object of Iterator // using iterator() method Iterator it = arrlist1.iterator(); // printing the iterated value while (it.hasNext()) { System.out.println("Value is : " + it.next()); } } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } }} |
Output:
ArrayList : [A, B, C, D, E] Value is : A Value is : B Value is : C Value is : D Value is : E
