1  public class VehicleDemo

  2  {

  3     public static void process(Vehicle v, String plateNumber)

  4     {

  5        // This example shows the syntax of instanceof and casting

  6        if (v instanceof Car) 

  7        {

  8           Car c = (Car) v; // Vehicle has no setLicensePlateNumber method--must cast

  9           c.setLicensePlateNumber(plateNumber);

 10        }

 11  

 12        System.out.println(v); // calls v.toString()

 13     }

 14  

 15     public static void main(String[] args)

 16     {

 17        Vehicle aCar = new Car(); 

 18        process(aCar, "XYX123"); 

 19  

 20        Vehicle aLimo = new Car(); 

 21        aLimo.setNumberOfTires(8);

 22        process(aLimo, "W00H00");

 23  

 24        process(new Motorcycle(), "MT1729");

 25     }

 26  }