class Light {

    String name;
    float r, g, b;
    boolean on;
	
    void onLight() {
        on = true;
        System.out.println("The light is turned on.");
    }
    
    void offLight() {
        on = false;
        System.out.println("The light is turned off.");
    }	

    void onOrOff () {
        if ( on == true ) 
            System.out.println("The light is on.");
        else System.out.println("The light is off.");
    }

    public static void main(String args[]) {
        Light light = new Light(); // Lightクラスのインスタンス化

        light.r = 1.0f; light.g = 1.0f; light.b = 1.0f; // 白色光

        light.onLight(); // 点灯
        light.onOrOff(); // 消灯か尋ねる.
    
        light.offLight(); // 消灯
        light.onOrOff(); // 消灯か尋ねる.    
    
    }
}