ClassAndObject.java

//Lamp class is created.
//The class has an instance variable `isOn` and three methods turnOn(), turnOff() and displayLightStatus().


class Lamp {
 boolean isOn;

 void turnOn() {
 isOn = true;
 }

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


class ClassObjectsExample {
public static void main(String[] args) {
 
 Lamp l1 = new switch(), l2 = new switch();
 
 l1.turnOn();
 l2.turnOff();
 
 l1.displayLightStatus();
 l2.displayLightStatus();
 }
}


/*The program on running, the output will be:
Light on? true
Light on? false*/