JAVA Programming :: Exception Handling - Discussion

What is the output for the below code ?

public class A {}
public class B implements Serializable {
private static A a = new A();
public static void main(String... args){
B b = new B();
try{
FileOutputStream fs = new
FileOutputStream("b.ser");
ObjectOutputStream os = new
ObjectOutputStream(fs);
os.writeObject(b);
os.close();
}catch(Exception e){
e.printStackTrace();
}
}
}