Java DVD Inventory Program - need to modify GUI to include more buttons and store items in dat file

Version 3 – Modify the inventory program to include and Add button, a Delete button, and a Modify button on the GUI. These buttons should allow the user to perform the corresponding actions on the item name, the number of units in stock, and the price of each unit. An item added to the inventory should have an item number one more than the previous last item. I also need to Add a save button to the GUI that saves the inventory to a C:datainventory.dat file. I need to use exception handling to create the directory and file if necessary. And I need to Add a search button to the GUI that allows the user to search for an item in the inventory by product name (DVD name). If the product is found,... click for more

Automata and Computability

Show that any PSPACE-hard language is also NP-hard.

Automata and Computability (A136)

Show that ANFA is NL-complete.

Automata and Computability

Let A be the language of properly nested parentheses. For example, ( () ) and ( () ( () ) ) () are in A, but ) ( is not. Show that A is in L.

Automata and Computability

Let EQREX = {R,S | R and S are equivalent regular expressions}. Show that EQREX  PSPACE. See attached file for full problem description.