Nurikabe Java Game

Do you Like Sudoku, Nurikabe is played on a grid. Like Sudoku, Nurikabe is a purely logic puzzle. Like Sudoku, each puzzle has only one solution, and like Sudoku, that solution can be reached without resorting to trial and error. Like Sudoku, puzzles can be very easy, presenting even the beginner with a 5 or 10 minute diversion, or very hard, occupying the hardened puzzler with a significant challenge.

The Objective

The object of Nurikabe is to shade each square black or leave it white, based on a few simple rules. Nurikabe does have more rules than Sudoku, but they quickly become intuitive.

The rules

Each square must be black or white. Nurikabe has 4 additional rules:

-Each group of white cells ('islands') must contain only one number

-The number of white squares in a group must equal that number

-All black squares must be linked together to form a continous block (the 'wall' or 'stream')

-2x2 blocks of black squares are disallowed