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public class Tamp {
    boolean isOn;

    void turnOn() {
        isOn = true;
        System.out.println("Light on? " + isOn);
    }

    void turnOff() {
        isOn = false;
        System.out.println("Light on? " + isOn);
    }
    
    boolean isLightOn() {
        return isOn;
    }

    public static void main(String[] args) {
        Tamp myTamp = new Tamp();
        myTamp.turnOn();
        myTamp.turnOff();
    }
}