Sort elements of Java ArrayList Example

This Java Example shows how to sort the elements of java ArrayList object using Collections.sort method.

import java.util.ArrayList;
import java.util.Collections;

public class SortJavaArrayListExample {

 public static void main(String[] args) {

  // create an ArrayList object
  ArrayList arrayList = new ArrayList();

  // Add elements to Arraylist
  arrayList.add("1");
  arrayList.add("3");
  arrayList.add("5");
  arrayList.add("2");
  arrayList.add("4");

  /*
   * To sort an ArrayList object, use Collection.sort method. This is a
   * static method. It sorts an ArrayList object's elements into ascending
   * order.
   */
  Collections.sort(arrayList);

  // display elements of ArrayList
  System.out
    .println("ArrayList elements after sorting in ascending order : ");
  for (int i = 0; i < arrayList.size(); i++)
   System.out.println(arrayList.get(i));

 }
}

The output is:



ArrayList elements after sorting in ascending order :
1
2
3
4
5