* StringBuffer (Java 5) may be declared as StringBuilder
* Replace map with flatMap
* Use instanceof naming
* No need to specify paramter types.
* Remove verbose code
* Fix JavaDoc issues
* Make internal class a record.
* Remove unused import.
* Make internal class a record.
* Made internal class a record.
* Removed unused import
* Fix typos
* Fix typo in test.
* Make variables final if they can be.
* Do not use final so that test can pass.
For testing, we use a trick to set this variable, but it won't work if
it is final. Right now, I'd like to keep the test.
Removed CellState.RESERVED for now
Made the Object an Island for now
Validate#notNull() in constructor
Made state and island variables final
Also updated the filters
Also commented out CellState.RESERVED.
That was a tough one. I had to rewrite IslandGrid#getIslandAt(int, int) quite a few times before using the stream() thing. I tested it a bit - it seems it is working like a charm.
I just hope that it won't be something useless - another plumbing change that adds nothing. It shouldn't - because of the "RESERVED" thing - but, well... it's been quite a hard thing!