Project 3.5

package Battery;

public class Battery {

        public static void main(String[] args) {
        Battery batt = new Battery();
        batt.drain(amount);
        batt.fill(amount);
        batt.charge(amount);
        System.out.println(charge);

        }
        private static double charge;
        private static double amount;

        private double charge(double amount) {
                amount = 3000;
                return charge;

        }
        public void drain(double amount) {
                charge = amount - 300;
        }
        public void fill(double amount) {
                charge = amount + 300;
        }
}