Java.util.ArrayList.toArray() Method


Advertisements


Description

The java.util.ArrayList.toArray() method returns an array containing 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.

Declaration

Following is the declaration for java.util.ArrayList.toArray() method

public Object[] toArray()

Parameters

  • NA

Return Value

This method returns an array containing all of the elements in this list in proper sequence.

Exception

NA

Example

The following example shows the usage of java.util.Arraylist.toarray() method.

Live Demo
package com.tutorialspoint;

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {

      // create an empty array list with an initial capacity
      ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

      // use add() method to add values in the list
      arrlist.add(20);
      arrlist.add(40);
      arrlist.add(10);
      arrlist.add(15);
      arrlist.add(25);
      
      // let us print all the elements available in list
      for (Integer number : arrlist) {
         System.out.println("Number = " + number);
      }  
      
      Object[] ob = arrlist.toArray();

      System.out.println("Printing elements from first to last:"); 
      for (Object value : ob) {
         System.out.println("Number = " + value);
      }
   }
}   

Let us compile and run the above program, this will produce the following result −

Number = 20
Number = 40
Number = 10
Number = 15
Number = 25
Printing elements from first to last:
Number = 20
Number = 40
Number = 10
Number = 15
Number = 25

java_util_arraylist.htm

Advertisements