Much work done on most of the classes. If you pull it into your NetBeans, you can run it and it should work. Significant changes:
-the 2 Player Game option on the main menu now starts a new 2 player game
-each player now has two arrays used throughout the program when it runs: one for their own board with their ships, and one for their hit/miss board to show all their shots and if they were a hit or miss
-each player now has their own guess function, in order to keep things more organized
-the board is now a 5X5 square, instead of 10X10
-each board displays a tilde (~) by default. When ships are added to locations, that spot currently changes to an "S"; when a ship location is hit, its value changes to an "X" on both the shooting player's hit/miss board and the shot-at player's personal board; when a shot is a miss, the value in that location changes to an "O" on the shooter's hit/miss board
-deleted multiple commented-out lines that no longer had any relevance
-temporarily deleted the Ship class (but don't worry, I saved all the code from it in a separate file; it just needed to be gone to compile correctly)