Question

what is the difference between AbstractApplicationContext and ApplicationContext ?
can we call

context.registerShutdownHook()  

using ApplicationContext?

I saw this while going through a sample code –

public static void main(String[] args) {
    AbstractApplicationContext context =new ClassPathXmlApplicationContext("Beans.xml");
    context.registerShutdownHook();
}

Answer 1

Same as the diff between abstract class (AbstractApplicationContext ) and an interface (ApplicationContext).

Can we call context.registerShutdownHook() using ApplicationContext?

No, because registerShutdownHook() is part of ConfigurableApplicationContext interface which is not extended by ApplicationContext