It's not just a song from summer camp, its an old-timey game: Here is a Video Explaining the rules

First we will make a BingoCell class, then a BingoCard class, and later we will make a BingoGame class.

The BingoCell class

The BingoCard class will need:

1. a 2-D array of BingoCells
2. a method that constructs the card so that:
   1. The “B” column has 5 unique numbers from 1-15
   2. The “I” column has 5 unique numbers from 16-30
   3. The “N” column has 4 unique numbers from 31-45, with the center a “Free” cell
   4. The “G” column has 5 unique numbers from 46-60
   5. The “O” column has 5 unique numbers from 61-75
3. a toString method that has no parameters, and returns a string representation of the board that is similar to :
4. a draw method takes a Graphics parameter to draw the board
5. a method 'hasBingo' (that returns a boolean) which detects a win for the rows, columns, and diagonals (later you can overload this with method that takes a parameter for the “blackout,” “corners,” or “box” variants)