Java Nested interface

iOrder.java

interface iOrder
{
void placeOrder();

interface iCancelOrder
{
void cancelOrder();
}
}

customer.java

class customer implements iOrder
{

public void placeOrder()
{
System.out.println("Customer can place order online");
}

public void cancelOrder()
{
System.out.println("Customer can cancel order online");
}

public static void main(String args[])
{

customer obj = new customer();

obj.placeOrder();
obj.cancelOrder();

}

Output