Constructor

package oop;

public class oopfile {

    public static void main(String[] args) throws Exception {
    Kifli oopfile = new Kifli("Kifli", 120, "chocolate", 60);
    oopfile.printInfo();
    }

}

package oop;

public class Kifli {
    String type;
    double volume;
    String filling;
    double quantity;

public Kifli(String type, double volume, String filling, double quantity) {
    this.type = type;
    this.volume = volume;
    this.filling = filling;
    this.quantity = quantity;
}

    void printInfo() {
        System.out.println("sugar product: " + this.type);
        System.out.println("volume: " + this.volume);
        System.out.println("filling: " + this.filling);
        System.out.printf("quantity: %.2f\n", this.quantity);
    }

    void put(double number) throws Exception {
        if ((number + this.quantity) > this.volume) {
            throw new Exception();
        } else {
            this.quantity += number;
        }
    }
}