Sorting an ArrayList

Source:

import java.util.ArrayList;
import java.util.Collections;
 
public class ArrayListSort { 
  public static void main(String[] args) { 
 
    ArrayList<String> list = new ArrayList<String>();
    list.add("John");
    list.add("Ringo");
    list.add("George");
    list.add("Paul");
 
    for(String str: list){
      System.out.println("Before: " + str);
    }
 
    Collections.sort(list);
 
    for(String str: list){
      System.out.println("After: " + str);
    }
 
  } 
}

Output:

   # java ArrayListSort 
   Before: John
   Before: Ringo
   Before: George
   Before: Paul
   After: George
   After: John
   After: Paul
   After: Ringo