      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  }