class X { 
int i, j; 
} 
class Y { 
int i, j; 
} 
class Z extends X { 
int k; 
} 

public class InstanceOfDemo { 
public static void main(String args[]) { 
X x = new X(); 
Y y = new Y(); 
Z z = new Z();
if(x instanceof X) 
System.out.println("x is instance of X"); 
X obj; 
obj = z; // X reference to c
if(obj instanceof Z) 
System.out.println("obj is instance of Z"); 
}
}