ArrayList - o método sort

Utilizando o método sort da classe Collections
fica muito fácil ordenar valores de um ArrayList,
Fica claro que há limitações, e este método
não satisfaz em todos os casos.
De qualquer forma, acompanhe meu exemplo:
 

Veja abaixo uma imagem do programa em execução:

Veja abaixo o código do programa:

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

public class PROJETO {

     public static void main ( String args [ ] ) {

         J jht = new J ( );

         jht.textbackground ( jht.WHITE );

         jht.Moldura ( ( short ) 1, ( short ) 24, ( short ) 2, ( short ) 68 );

         jht.title ( " " );

         int i;

         ArrayList < String > arrList = new ArrayList <> ( Arrays.asList (

                   "3", "4", "5", "6", "1", "7", "8", "9", "2","0" ) );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 23, ( short ) 3 );

         System.out.printf ( "ARRAYLIST - O MÉTODO SORT" );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( short ) 18, ( short ) 5 );

         System.out.printf ( "Abaixo a impressão normal do ArrayList" );

         // ////////////////////////////////////////////

         jht.gotoxy ( ( int ) 18, ( int ) 7 );

         jht.textcolor ( jht.BLACK );

         for ( i = 0; i < arrList.size ( ); i++ ) {

              if ( i == 10 )

                   jht.gotoxy ( ( int ) 18, ( int ) 8 );

              System.out.print ( " " );

              System.out.printf ( arrList.get ( i ) );

         }

         //Ordenando o ArrayList

         Collections.sort ( arrList );

         // ////////////////////////////////////////////

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( short ) 18, ( short ) 9 );

         System.out.printf ( "Abaixo a impressão do ArrayList ordenado" );

         jht.textcolor ( jht.LIGHTMAGENTA );

         jht.gotoxy ( ( int ) 18, ( int ) 11 );

         for ( i = 0; i < arrList.size ( ); i++ ) {

              if ( i == 10 )

                   jht.gotoxy ( ( int ) 18, ( int ) 11 );

              System.out.print ( " " );

              System.out.printf ( arrList.get ( i ) );

         }

         // ////////////////////////////////////////////

         jht.textbackground ( jht.WHITE );

         jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( short ) 23, ( short ) 19 );

         System.out.printf ( "Por: " );

         jht.textcolor ( jht.LIGHTBLUE );

         System.out.printf ( "Samuel Lima" );

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( short ) 23, ( short ) 20 );

         System.out.printf ( "sa_sp10@hotmail.com" );

         jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 29, ( short ) 22 );

         System.out.printf ( "MUITO OBRIGADO" );

         jht.getche ( );

     }

}