List conversion, to array

In this chapter you will learn:

1. How to convert list to array

Convert List to Array

• Object[] toArray()
  Returns an array containing all of the elements in this list in proper sequence (from first to last element).
• <T> T[] toArray(T[] a)
  Returns an array containing all of the elements in this list in proper sequence (from first to last element); the runtime type of the returned array is that of the specified array.

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
//from j a v a 2s  .c  om
public class Main {
  public static void main(String[] args) {
    List list = new ArrayList();

    list.add("1");
    list.add("2");
    list.add("3");

    list.add("java2s.com");

    System.out.println(list);

    Object[] array = list.toArray();

    System.out.println(Arrays.toString(array));
  }
}

The output:

Next chapter...

What you will learn in the next chapter:

1. How to get the sub list from a list

List

    List interface

    List add/insert elements

    List clear/remove elements

    List search

    List element get and set

    List and its Iterator

    List size, empty

    List conversion, to array

    List to sublist

    List comparison

    List filling

    List reversing

    List rotating and shuffling

    List sorting

    List element swap

    List element replacing

    List copy

    List binary search

ArrayList

    ArrayList

    ArrayList Creation

    ArrayList add/insert

    ArrayList get/set element

    ArrayList clear/remove

    ArrayList search

    ArrayList copy and shallow copy

    ArrayList size, trim to size and capacity

    ArrayList to array

LinkedList

    LinkedList class

    LinkedList creation

    LinkedList add/insert elements

    LinkedList get elements

    LinkedList search

    LinkeList replace/set elements

    LinkedList remove element

    LinkedList copy

    LinkedList iterator

    LinkedList peek element

    LinkedList pop/push element

    LinkedList conversion

List Utilities

    List filling

    List reversing

    List rotating and shuffling

    List sorting

    List element swap

    List element replacing

    List copy

    List binary search