Diferença entre dois arrays de inteiros

Dados dois conjuntos A e B chama-se conjunto diferença ou
diferença entre A e B o conjunto formado pelos elementos
de A que não pertencem a B.
O conjunto diferença é representado por A – B.
Mais informações confira no link abaixo:
"brasilescola.uol.com.br/matematica/operacoes-com-conjuntos"
Partindo destas informações criei este programa,
que simula dois conjuntos de números inteiros,
que são preenchidos pela entrada e dados padrão do java
E depois da impressão na tela, são enviados a um bloco
para a verificação dos elementos do Array A que não fazem
parte do array B.

Veja abaixo imagens do programa em execução:

Veja abaixo o código do programa:

import java.util.Scanner;

public class PROJETO {

     public static int tam = 20;

     public static void main ( String args [ ] ) {

         J jht = new J ( );

         jht.textbackground ( jht.WHITE );

         jht.Moldura ( ( short ) 1, ( short ) 24, ( short ) 2, ( short ) 78 );

         jht.title ( " " );

         int z = 0, y = 0;

         int a = 0;

         int [ ] A = new int [ tam ];

         int [ ] B = new int [ tam ];

         int [ ] C = new int [ tam ];

         int i, p, q, n = 0;

         do {

              jht.cls ( );

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( int ) 22, ( int ) 3 );

              System.out.printf ( "DIFERENÇA ENTRE DOIS ARRAYS DE INTEIROS" );

              jht.textcolor ( jht.LIGHTBLUE );

              jht.gotoxy ( ( int ) 25, ( int ) 5 );

              System.out.printf ( "Quantos números terá o array A ? " );

              jht.textcolor ( jht.LIGHTRED );

              Scanner sc = new Scanner ( System.in );

              p = sc.nextInt ( );

              jht.textcolor ( jht.BLACK );

              jht.gotoxy ( ( int ) 20, ( int ) 9 );

              if ( p < 0 || p > tam ) {

                   System.out.printf ( "Número Acima de 0 e menor que %d ", tam );

                   jht.getche ( );

                   jht.cls ( );

              }

         } while ( ( p < 0 ) || ( p > tam ) );

         for ( i = 0; i < p; i++ ) {

              jht.cls ( );

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( int ) 22, ( int ) 3 );

              System.out.printf ( "DIFERENÇA ENTRE DOIS ARRAYS DE INTEIROS" );

              jht.textcolor ( jht.LIGHTBLUE );

              jht.gotoxy ( ( int ) 32, ( int ) 5 );

              System.out.printf ( "Insira o " );

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( int ) 40, ( int ) 5 );

              System.out.printf ( " %do", i + 1 );

              jht.textcolor ( jht.LIGHTBLUE );

              jht.gotoxy ( ( int ) 44, ( int ) 5 );

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

              jht.textcolor ( jht.LIGHTRED );

              Scanner sc = new Scanner ( System.in );

              A [ i ] = sc.nextInt ( );

         }

         do {

              jht.cls ( );

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( int ) 22, ( int ) 3 );

              System.out.printf ( "DIFERENÇA ENTRE DOIS ARRAYS DE INTEIROS" );

              jht.textcolor ( jht.LIGHTBLUE );

              jht.gotoxy ( ( int ) 25, ( int ) 5 );

              System.out.printf ( "Quantos números terá o array B ? " );

              jht.textcolor ( jht.LIGHTRED );

              Scanner sc = new Scanner ( System.in );

              q = sc.nextInt ( );

              jht.textcolor ( jht.BLACK );

              jht.gotoxy ( ( int ) 20, ( int ) 9 );

              if ( q < 0 || q > tam ) {

                   System.out.printf ( "Número Acima de 0 e menor que %d ", tam );

                   jht.getche ( );

                   jht.cls ( );

              }

         } while ( ( q < 0 ) || ( q > tam ) );

         for ( i = 0; i < q; i++ ) {

              jht.cls ( );

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( int ) 22, ( int ) 3 );

              System.out.printf ( "DIFERENÇA ENTRE DOIS ARRAYS DE INTEIROS" );

              jht.textcolor ( jht.LIGHTBLUE );

              jht.gotoxy ( ( int ) 32, ( int ) 5 );

              System.out.printf ( "Insira o " );

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( int ) 40, ( int ) 5 );

              System.out.printf ( " %do", i + 1 );

              jht.textcolor ( jht.LIGHTBLUE );

              jht.gotoxy ( ( int ) 44, ( int ) 5 );

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

              jht.textcolor ( jht.LIGHTRED );

              Scanner sc = new Scanner ( System.in );

              B [ i ] = sc.nextInt ( );

         }

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( int ) 22, ( int ) 7 );

         System.out.printf ( "Números inseridos no array A ==> " );

         jht.textcolor ( jht.LIGHTRED );

         System.out.printf ( "%d", p );

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( int ) 22, ( int ) 9 );

         for ( i = 0; i < p; i++ ) {

              System.out.printf ( " %d ", A [ i ] );

         }

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( int ) 22, ( int ) 11 );

         System.out.printf ( "Números inseridos no array B ==> " );

         jht.textcolor ( jht.LIGHTRED );

         System.out.printf ( "%d", q );

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( int ) 22, ( int ) 13 );

         for ( i = 0; i < q; i++ ) {

              System.out.printf ( " %d ", B [ i ] );

         }

         jht.getche ( );

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

         int j = 0, aux = 0, auxin = 0;

         aux = 0;

         auxin = 0;

         for ( i = 0; i < tam; i++ ) {

              for ( j = 0; j < tam; j++ ) {

                   if ( A [ i ] != B [ j ] ) {

                        auxin++;

                   }

              }

              if ( auxin == tam ) {

                   C [ aux ] = A [ i ];

              } else {

                   C [ aux ] = 0;

              }

              aux++;

              auxin = 0;

         }

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( int ) 22, ( int ) 15 );

         System.out.printf ( "Abaixo a diferença entre os dois arrays " );

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( int ) 22, ( int ) 17 );

         for ( i = 0; i < p; i++ ) {

              if ( C [ i ] != 0 ) {

                   System.out.printf ( " %d ", C [ i ] );

              }

              if ( A [ i ] == 0 ){

                   C [ i ] = 0;

                   System.out.printf ( " %d ", C [ i ] );

              }

         }

          jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTBLUE );

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

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

         jht.textcolor ( jht.LIGHTMAGENTA );

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

         jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 36, ( short ) 22 );

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

         jht.getche ( );

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

     }

}