How can i take Input a variable from console

import java.util.*;    
public class Demo
{
static private Scanner input =new Scanner(System.in);                  //static becz we are going to use it in static                   method
public static void main(String[] args)
{
double data;
System.out.print("Please Enter Data :  ");                        //displaying msg to inpuut data
data=input.nextDouble();                                                // assigning double to data variable
System.out.println("Data :    "+data);

}
}