public class CabBookingSystem {

    public int cabId;
    public String driverName;
    public boolean isAvailable;

    public void showCabInfo(){
        System.out.println("Cab Id: " + cabId);
        System.out.println("Driver Name: " + driverName);
        System.out.println("Available: " + isAvailable);
    }

    public static void main(String[] args) {
        System.out.println("new Step 4: Refernce & Object Creation ");

        CabBookingSystem cab1;
        cab1 = new CabBookingSystem();

        cab1.cabId = 101;
        cab1.driverName = "Nitin";
        cab1.isAvailable = true;

        cab1.showCabInfo();

        CabBookingSystem cab2;
        cab2 = null;

        System.out.println("Cab2 reference: " + cab2);

    }
    
}