Home » Java Book » Collections » Collection » 
« Remove elements from a collection
Get the size of a Collection »
 

Convert collection to Array

ReturnMethodSummary
Object[]toArray()Returns an array containing all of the elements in this collection.
<T> T[] toArray(T[] a)Returns an array containing all of the elements in this collection; the runtime type of the returned array is that of the specified array.

import java.util.ArrayList;
import java.util.Collection;

public class Main {

  public static void main(String args[]) {
     Collection collection = new ArrayList();
     collection.add("java2s.com");
     collection.add("j a v a 2 s.com");
     collection.add("j a v a 2 s . com");
     collection.add("j a v a 2 s . c o m");
     
     Object[] array = collection.toArray();
     System.out.println(array.length);
     
  }
}

The output: 


4
« Remove elements from a collection
Get the size of a Collection »
 
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.