nr prime java

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package pkg40313;
import java.util.*;
/**
 *
 * @author L1PC08
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
       int x,i,ok=1;
       Scanner ts=new Scanner(System.in);
       System.out.println("dati doua nr de la tastatura");
       x=ts.nextInt();

       for(i=2;i<x/2;i++)
       if(x%i==0)ok=0;
       if(ok==0)
           System.out.println(x+" nu este  prim");
       else
           System.out.println(x+"este prim");
    }

}