Java Cube Root

import java.util.Scanner;

public class FindingCubeRoot {

   public static void main(String args[]){

      double i, precision = 0.000001;

      System.out.println("Enter a number ::");

      Scanner sc = new Scanner(System.in);

      int num = sc.nextInt();



      for(i = 1; (i*i*i) <= num; ++i);

      for(--i; (i*i*i) < num; i += precision);

      System.out.println("Cube root of the given number is "+i);

   }

}