should i put exam slight removed class? so, how?

i am unequivocally new java. assignment emanate possess slight following emanate category exam in.
my question, i emanate slight removed class, within class? removed class, i category opening method?

(are saved twin removed files?)

this i have far, nonetheless i am removing an blunder i have initialize kilowatt category dwindmill. i guess i already method??? any suggestions?

//this slight windmill

import java.util.*;
import stationary java.lang.math.*;

class dwindmill {



    open stationary vacant windmill(){
    //create slight windmill class

    int miles = 50;
    //int miles = 200;
    //int miles = 250;
    int kilowatt = (miles / 50);}


    stationary scanner console = new scanner(system.in);
    {


    system.out.println("enter miles per hour:");
    miles = console.nextint();

    windmill();

    system.out.println(+ kilowatt + "kilowatts");

    }
}