ArrayList - o método indexOf

Como disse no tópico "ArrayList - definição e inicialização",
o ArrayList foi criado para se ter mais flexibilidade
com arrays, neste exemplo mostro o quanto é simples saber
qual é a posição de um elemento num ArrayList,
só foi preciso invocar o método .indexOf para esta ação.

Veja abaixo uma imagem do programa em execução:

Veja abaixo o código do programa:

import java.util.ArrayList;

import java.util.Arrays;

public class PROJETO {

     public static void main ( String args [ ] ) {

         int i, tam = 0, pos = 0;

         J jht = new J ( );

         jht.title ( " " );

         jht.textbackground ( jht.WHITE );

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

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

                   "Palmeiras",

                   "Corinthians",

                   "São Paulo" ) );

         jht.textcolor ( jht.LIGHTRED );

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

         System.out.println ( "ARRAYLIST - O MÉTODO INDEXOF" );

         jht.textcolor ( jht.LIGHTBLUE );

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

         System.out.println ( "Veja abaixo os" );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 33, ( short ) 5 );

         System.out.println ( "3" );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( short ) 35, ( short ) 5 );

         System.out.println ( "elementos" );

         jht.gotoxy ( ( short ) 18, ( short ) 6 );

         System.out.println ( "inicializados pelo ArrayList" );

         jht.textcolor ( jht.BLACK );

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

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

              if ( i == 1 ){

                   jht.textcolor ( jht.LIGHTRED );

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

                   System.out.print ( arrList.get ( 1 ) );

              }else{

                   if ( i == 0 )

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

                   if ( i == 1 )

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

                   if ( i == 2 )

                        jht.gotoxy ( ( int ) 18, ( int ) 10 );

                   jht.textcolor ( jht.BLACK );

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

              }

         }

         // Retornando a posição deste elemento

         pos = arrList.indexOf ( "Corinthians" );

         tam = arrList.size ( );

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

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( short ) 18, ( short ) 12 );

         System.out.println ( "O elemento " );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 29, ( short ) 12 );

         System.out.println ( "Corinthians" );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( short ) 41, ( short ) 12 );

         System.out.println ( "está na posição " );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 57, ( short ) 12 );

         System.out.println ( pos );

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

         jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 27, ( short ) 19 );

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

         jht.textcolor ( jht.LIGHTBLUE );

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

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( short ) 27, ( 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 ( );

     }

}