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
How to convert LinkedList to Array in Java?
The toArray() method of the LinkedList class converts the current Linked List object into an array of object type and returns it. This array contains all of the elements in this list in proper sequence (from first to last element). This acts as bridge between array-based and collection-based APIs.
Therefore, to convert a LinkedList to an array −
Instantiate the LinkedList class.
Populate it using the add() method.
Invoke the toArray() method on the above created linked list and retrieve the object array.
Convert each and every element of the object array to string.
Example
import java.util.Arrays;
import java.util.LinkedList;
public class LinkedListToArray {
public static void main(String[] args) {
LinkedList <String> list = new LinkedList<String>();
//Instantiating an ArrayList object
list.add("JavaFX");
list.add("Java");
list.add("WebGL");
list.add("OpenCV");
list.add("OpenNLP");
list.add("JOGL");
list.add("Hadoop");
list.add("HBase");
list.add("Flume");
list.add("Mahout");
list.add("Impala");
Object[] objectAarray = list.toArray();
int length = objectAarray.length;;
String [] stringArray = new String[length];
for(int i =0; i < length; i++) {
stringArray[i] = (String) objectAarray[i];
}
System.out.println("Contents of the array: \n"+Arrays.toString(stringArray));
}
}Output
Contents of the array: [JavaFX, Java, WebGL, OpenCV, OpenNLP, JOGL, Hadoop, HBase, Flume, Mahout, Impala]
You can also get the String array directly by passing new String[0] to the toArray() method.
Example
import java.util.Arrays;
import java.util.LinkedList;
public class LinkedListToArray {
public static void main(String[] args) {
LinkedList <String> list = new LinkedList<String>();
//Instantiating an ArrayList object
list.add("JavaFX");
list.add("Java");
list.add("WebGL");
list.add("OpenCV");
list.add("OpenNLP");
list.add("JOGL");
list.add("Hadoop");
list.add("HBase");
list.add("Flume");
list.add("Mahout");
list.add("Impala");
String[] stringArray = list.toArray(new String[0]);
System.out.println("Contents of the array: \n"+Arrays.toString(stringArray));
}
}Output
Contents of the array: [JavaFX, Java, WebGL, OpenCV, OpenNLP, JOGL, Hadoop, HBase, Flume, Mahout, Impala]
Updated on: 14-Oct-2019
5K+ Views
Advertisements