// instance.java -- test the `instanceof' operator.import java.util.EventListener;public class instance implements EventListener{  public static void main (String[] args)  {    Object x1 = new instance ();    EventListener x2 = new instance ();    IllegalArgumentException iae      = new IllegalArgumentException ("any random class");    String x3 = "zardoz";    Object x4 = "zardoz";    // Test simple object stuff    System.out.println (x1 instanceof Object);    System.out.println (x1 instanceof IllegalArgumentException);    System.out.println (x1 instanceof EventListener);    System.out.println (x1 instanceof String);    System.out.println ("=");    // Test with value which is an interface.    System.out.println (x2 instanceof Object);    System.out.println (x2 instanceof IllegalArgumentException);    System.out.println (x2 instanceof EventListener);    System.out.println ("=");    // Test with value which is a final class.    System.out.println (x3 instanceof Object);    System.out.println (x3 instanceof String);    System.out.println ("=");    // Test with value which is a random class.    System.out.println (iae instanceof Object);    System.out.println (iae instanceof IllegalArgumentException);    System.out.println (iae instanceof EventListener);    System.out.println ("=");    // Test with value which is a final class, but not known    // statically.    System.out.println (x4 instanceof Object);    System.out.println (x4 instanceof IllegalArgumentException);    System.out.println (x4 instanceof EventListener);    System.out.println (x4 instanceof String);    System.out.println (x4 instanceof int[]);  }}