Método

public static void aleatorio() {

int n = 100000, x = 0;

int original[] = new int[n];

int a[]= new int[n];

for(int i=0; i < n; i++){
       x = (int) (Math.random()*1000);
       original[i]=x;
       a[i]=x;
        if (x >= 120 && x <= 130){
        System.out.println("x =" + x);
        }
    }
    int i, j, menor, aux;
    for(i=0; i<(n-1);i++){
        menor = i;
        for(j=(i+1);j<n;j++)
            if(a[j]<a[menor])
                menor=j;
            
            aux=a[i];
            a[i]=a[menor];
            a[menor]=aux;
        }
    }

public class pesquisaSequencial{

    int  pesquisaSequencial(int vetor[],int tam, int dado) {
        System.out.println(vetor);
        int i = 0;
        if (x >= 120 && x <= 130){
        System.out.println("x =" + x);
        }
        while(i < tam && dado != vetor[i]){
            i++;
        } if(i < tam){
                return i;
               
        } else{
                return -1;
        }
    }