Arrays aleatórios - primos e não primos

Este exemplo traz poucas diferenças em relação
ao outro que postei antes deste.
O que caracteriza a principal diferença deste
pro outro é que aqui não usei arrayList,
e nem o método shuffle da classe Collections,
para embaralhamento dos números,
tudo foi feito usando arrays simples do tipo int
e o embaralhamento dos números foi feito através
da classe Random da biblioteca java.util.Random;

Acompanhe as imagens abaixo:

Veja abaixo o código do programa:

import java.util.Random;

public class PROJETO {

     public static int  tam  = 30;

     public static void Sorteia ( int vet [ ] ) {

         int a = 0, i, temp, y;

         J jht = new J ( );

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

         for ( i = 2; i < tam + 2; i++ ) {

              vet [ a ] = i;

              a++;

         }

         Random random = new Random ( );

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

              y = random.nextInt ( tam );

              temp = vet [ a ];

              vet [ a ] = vet [ y ];

              vet [ y ] = temp;

         }

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

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 24, ( short ) 3 );

         System.out.printf ( "VETORES ALEATÓRIOS - PRIMOS E NÃO PRIMOS" );

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( int ) 10, ( int ) 7 );

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

              if ( i == 15 )

                   jht.gotoxy ( ( int ) 10, ( int ) 8 );

              if ( i == 30 )

                   jht.gotoxy ( ( int ) 10, ( int ) 9 );

              System.out.printf ( " %2d ", vet [ i ] );

         }

         jht.getche ( );

     }

     public static void Insere_Aleat ( int vet [ ] ) {

         J jht = new J ( );

         int vet_1 [ ] = new int [ tam ];

         int vet_2 [ ] = new int [ tam ];

         int a = 0, b = 0, c = 0, k = 0, i, z = 0;

         int p, t = 0, u = 0, v = 0;

         if ( k == tam && z >= 1 )

              k = 0;

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

              k++;

              a = vet [ i ] - 2;

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( short ) 23, ( short ) 10 );

              System.out.printf ( "%d°", k + 0 );

              jht.textcolor ( jht.LIGHTBLUE );

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

              jht.textcolor ( jht.LIGHTRED );

              System.out.printf ( " %d ", vet [ a ] );

              if ( k >= 1 && k <= tam ) {

                   jht.textcolor ( jht.LIGHTRED );

                   jht.gotoxy ( ( int ) 42, ( int ) 10 );

                   if ( k >= 1 || k <= tam ) {

                        for ( b = 1, p = 0; b <= vet [ a ]; b++ ) {

                            if ( vet [ a ] % b == 0 )

                                 p++;

                        }

                        if ( p == 2 ) {

                            vet_1 [ t ] = vet [ a ];

                            t++;

                            u = t;

                        } else {

                            vet_2 [ c ] = vet [ a ];

                            c++;

                            v = c;

                        }

                   }

              }

              jht.gotoxy ( ( int ) 45, ( int ) 10 );

              jht.textcolor ( jht.LIGHTBLUE );

              System.out.printf ( " posição" );

              jht.textcolor ( jht.LIGHTRED );

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

              jht.textcolor ( jht.LIGHTBLUE );

              jht.gotoxy ( ( int ) 23, ( int ) 12 );

              System.out.printf ( "O programa está agora" );

              jht.textcolor ( jht.LIGHTRED );

              System.out.printf ( " copiando " );

              jht.textcolor ( jht.LIGHTBLUE );

              System.out.printf ( "números" );

              if ( k == tam ) {

                   jht.gotoxy ( ( short ) 23, ( short ) 15 );

                   jht.textcolor ( jht.LIGHTBLUE );

                   System.out.printf ( "Abaixo os números primos entre " );

                   jht.textcolor ( jht.LIGHTRED );

                   System.out.printf ( "1" );

                   jht.textcolor ( jht.LIGHTBLUE );

                   System.out.printf ( " e" );

                   jht.textcolor ( jht.LIGHTRED );

                   System.out.printf ( " 32" );

                   jht.textcolor ( jht.BLACK );

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

                   for ( c = 0; c < u; c++ ) {

                        System.out.printf ( " %2d ", vet_1 [ c ] );

                   }

              }

              if ( k == tam ) {

                   jht.Apaga ( ( short ) 12, ( short ) 13, ( short ) 22,

                            ( short ) 65 );

                   jht.gotoxy ( ( short ) 23, ( short ) 12 );

                   jht.textcolor ( jht.LIGHTBLUE );

                   System.out.printf ( "O programa" );

                   jht.textcolor ( jht.LIGHTRED );

                   System.out.printf ( " copiou" );

                   jht.textcolor ( jht.LIGHTBLUE );

                   System.out.printf ( " com sucesso " );

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

                   jht.textcolor ( jht.LIGHTBLUE );

                   System.out.printf ( "Abaixo os números não primos entre " );

                   jht.textcolor ( jht.LIGHTRED );

                   System.out.printf ( "1" );

                   jht.textcolor ( jht.LIGHTBLUE );

                   System.out.printf ( " e" );

                   jht.textcolor ( jht.LIGHTRED );

                   System.out.printf ( " 32" );

                   jht.textcolor ( jht.BLACK );

                   jht.gotoxy ( ( short ) 22, ( short ) 21 );

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

                        if ( i == 10 )

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

                        System.out.printf ( " %2d ", vet_2 [ i ] );

                   }

              }

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( short ) 30, ( short ) 24 );

              System.out.printf ( "PRESSIONE QUALQUER TECLA" );

              jht.getche ( );

              jht.Apaga ( ( short ) 10, ( short ) 11, ( short ) 54, ( short ) 57 );

              if ( k == 30 )

                   break;

         }

         jht.Apaga ( ( short ) 12, ( short ) 13, ( short ) 22, ( short ) 65 );

     }

     public static void main ( String args [ ] ) {

         J jht = new J ( );

         jht.Moldura ( ( short ) 1, ( short ) 28, ( short ) 2, ( short ) 78 );

         jht.title ( " " );

         int z = 0, y = 0;

         int vet [ ] = new int [ tam ];

         do {

              jht.cls ( );

              jht.gotoxy ( ( short ) 23, ( short ) 12 );

              jht.textcolor ( jht.LIGHTBLUE );

              System.out.printf ( "Agora o programa " );

              jht.textcolor ( jht.LIGHTRED );

              System.out.printf ( "copiará " );

              jht.textcolor ( jht.LIGHTBLUE );

              System.out.printf ( "os números" );

              jht.gotoxy ( ( short ) 24, ( short ) 13 );

              System.out.printf ( "primos e não primos em dois vetores" );

              z++;

              jht.textcolor ( jht.LIGHTRED );

              jht.gotoxy ( ( short ) 29, ( short ) 5 );

              System.out.printf ( "%dª", z + 0 );

              jht.textcolor ( jht.LIGHTBLUE );

              System.out.printf ( " Rodada " );

              jht.textcolor ( jht.LIGHTRED );

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

              jht.textcolor ( jht.LIGHTBLUE );

              System.out.printf ( "números gerados" );

              Sorteia ( vet );

              Insere_Aleat ( vet );

              y++;

         } while ( y < 3 );

         jht.Apaga ( ( short ) 24, ( short ) 25, ( short ) 29, ( short ) 65 );

         jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTBLUE );

         jht.gotoxy ( ( short ) 23, ( short ) 24 );

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

         jht.textcolor ( jht.LIGHTMAGENTA );

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

         jht.textcolor ( jht.BLACK );

         jht.gotoxy ( ( short ) 23, ( short ) 25 );

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

         jht.Sleep ( ( short ) 1800 );

         jht.textcolor ( jht.LIGHTRED );

         jht.gotoxy ( ( short ) 36, ( short ) 27 );

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

         jht.getche ( );

     }

}