Can we use iterator in ArrayList?

java

programming

iterator

arraylist

[Edit]

Java - how to use Iterator with ArrayList

2 contributors

7 contributions

0 discussions

0 points

Created by:

Violet-Hoffman

352

In this article, we would like to show you how to use iterator with ArrayList in Java.

Nội dung chính Show

Java - how to use Iterator with ArrayList
Introduction
Create iterator
Iterator methods
Practical example
Video liên quan

Quick solution:

Iterator myIterator = myArrayList.iterator(); while (myIterator.hasNext()) { System.out.print(myIterator.next() + " "); }

Introduction

Iterator is an object that can be used to loop through collections. In this article, we will focus on the ArrayList collection and loop through it.

Create iterator

To use Iterator, the first thing we need to do is obtain it from a Collection. To do so, we use iterator() method in the following way:

List myArrayList = ... Iterator myIterator = myArrayList.iterator();

Iterator methods

hasNext() -checksif there is at least one element left to iterate over, it's commonlyused as a condition in while loops.
next() -stepsover the next element and obtainsit.

Practical example

In this example, we create an iterator for letters ArrayList to display all the elements in the proper order.

import java.util.*; public class Example { public static void main(String[] args) { List letters = new ArrayList<>(); letters.add("A"); letters.add("B"); letters.add("C"); // create an iterator Iterator myIterator = letters.iterator(); // display values after iterating through the ArrayList System.out.println("The iterator values of the list are: "); while (myIterator.hasNext()) { System.out.print(myIterator.next() + " "); } } }

Output:

The iterator values of the list are: A B C

Top List List

Can we use iterator in ArrayList?

Java - how to use Iterator with ArrayList

Introduction

Create iterator

Iterator methods

Practical example

Bài Viết Liên Quan

Quảng Cáo

Có thể bạn quan tâm

Toplist được quan tâm

Quảng cáo

Xem Nhiều

Quảng cáo

Chúng tôi

Điều khoản

Trợ giúp

Mạng xã hội