Answer:
The code is given in the explanation section
Explanation:
//Class Airconditioner
public class AirConditioner {
    private boolean turnOnOff;
//The Constructor
    public AirConditioner(boolean turnOnOff) {
        this.turnOnOff = turnOnOff;
    }
//method turn_on
    public void turn_on(){
        this.turnOnOff = true;
    }
//method turn_off
    public void turn_off( ){
        this.turnOnOff = false;
    }
}
// A new class to test the airconditional class
class AircondionTest{
    public static void main(String[] args) {
//Creating an object of the Aircondional class
        AirConditioner office_a_c = new AirConditioner(false);
//Using the reference varible to call method turn_on       
 office_a_c.turn_on();
    }
}