- Trending Categories
- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Conversion of Array To ArrayList in Java
We can convert an array to arraylist using following ways.
Using Arrays.asList() method - Pass the required array to this method and get a List object and pass it as a parameter to the constructor of the ArrayList class.
Collections.addAll() method - Create a new list before using this method and then add array elements using this method to existing list.
Iteration method - Create a new list. Iterate the array and add each element to the list.
Example
import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class Tester { public static void main(String args[]) { String[] array = {"a", "b", "c", "d", "e"}; //Method 1 List<String> list = Arrays.asList(array); System.out.println(list); //Method 2 List<String> list1 = new ArrayList<String>(); Collections.addAll(list1, array); System.out.println(list1); //Method 3 List<String> list2 = new ArrayList<String>(); for(String text:array) { list2.add(text); } System.out.println(list2); } }
Output
[a, b, c, d, e] [a, b, c, d, e] [a, b, c, d, e]
Advertisements