tests/Java/zh/CoffeMachine.java

class CoffeMachine {
    /* ezzel nem végeztem időben
    static interface MachineState {
        MachineState insertCoins(int i);
        MachineState enterOrder(String type, String extras);
        MachineState doneButtonPush();
    }

    static class ReadyState implements MachineState {
        MachineState insertCoins(int i) {
            balance = i;
            return new OrderState();
        }
        MachineState enterOrder(String type, String extras) {
            // request gets denied
            return this;
        }
        MachineState doneButtonPush() {
            // request gets denied
            return this;
        }
    }

    static class OrderState implements MachineState {
        MachineState insertCoins(int i) {
            System.out.println("Giving back the inserted " + i + "currency.");
            return this;
        }
        MachineState enterOrder(String type, String extras) {
            currentDrink = hotDrinkFactory(type, extras);
            return this;
        }
        MachineState doneButtonPush() {
            System.out.println("Giving back the all inserted currency (" + balance + ").");
            return new ReadyState();
        }
    }

    static class FinalizeState implements MachineState {
        MachineState insertCoins(int i) {
            System.out.println("Giving back the inserted " + i + "currency.");
            return this;
        }
        MachineState enterOrder(String type, String extras) {
            // nothing happens
            return this;
        }
        MachineState doneButtonPush() {
            prepareHotDrink(currentDrink);
            currentDrink = null;
            return new ReadyState();
        }
    }

    int balance = 0;
    MachineState ms = ReadyState();
    HotDrink currentDrink = null;
    */

    void boil(HotDrink hd, int temperature) {
        System.out.println("Boiling at " + temperature + " degrees Celsius.");
    }

    void mix(HotDrink hd) {
        System.out.println("Mixing.");
    }

    void stir(HotDrink hd) {
        System.out.println("Stirring.");
    }

    void handOut(HotDrink hd) {
        System.out.println(hd);
    }

    // Template metódus
    HotDrink prepareHotDrink(HotDrink hd) {
        System.out.println("Preparing hot drink...");
        boil(hd, hd.getBoilingTemperature());
        mix(hd);
        stir(hd);
        System.out.println("Hot drink prepared.");
        handOut(hd);
        return hd;
    }

    // Factory metódus
    public HotDrink hotDrinkFactory(String type, String extras) {
        HotDrink hd = null;

        switch (type.toLowerCase()) {
            case "coffee":
                hd = new HotCoffee();
                break;
            case "tea":
                hd = new HotTea();
                break;
            default:
                System.out.println("Invalid type.");
                return null;
        }

        for (char extra : extras.toCharArray()) {
            switch (extra) {
                case 's':
                    hd = new SugarDecorator(hd);
                    break;
                case 'm':
                    hd = new MilkDecorator(hd);
                    break;
                default:
                    System.out.println("Extra '" + extra + "' is not recognized.");
            }
        }

        prepareHotDrink(hd);

        return hd;
    }
}