public class Appliance {
    private boolean powerConnected;

    public Appliance(boolean connected) {
        this.powerConnected = connected;
    }

    public boolean getPowerState() {
        return powerConnected;
    }

    public void plug() {
        powerConnected = true;
    }

    public void unplug() {
        powerConnected = false;
    }

    public float min(float v1, float v2) {
        return v1 <= v2 ? v1 : v2;
    }

    public float max(float v1, float v2) {
        return v1 >= v2 ? v1 : v2;
    }

    public float getPowerConsumption() {
        return 0f;
    }

    public void step(float seconds, float ventRPM) {}
}