In Java. Write the code that implements a skeleton application that corresponds to the Observer Design Case. Write a main method that adds and removes item to make sure everything works as expected. Inventory interface Observer + void removeltem(Item) int serialNumber int year +void addObserver(Observer) void removeObserver(Observer) notifyObservers(Item) void itemAdded(ltem) void itemRemoved(ltem) ListView In Java. Write the code that implements a skeleton application that corresponds to the Observer Design Case. Write a main method that adds and removes item to make sure everything works as expected. Inventory interface Observer + void removeltem(Item) int serialNumber int year +void addObserver(Observer) void removeObserver(Observer) notifyObservers(Item) void itemAdded(ltem) void itemRemoved(ltem) ListView