java - Generics in Java, and extending classes

Question

I'm trying to write a method that get a B that extends SearchBoard(interface), and an M that extends BoardMove(interface).

Now I have written CrossWord(interface), and MyCrossWord that implements CrossWord, but my method is not willing to recognize MyCrossWord as a legit SearchBoard obj.. I know I did something wrong with the generics someplace.

Answer 1

<B extends SearchBoard, M extends BoardMove> void someMethod(B board, M move) {
...
}

只要 B 是 SearchBoard、CrossWord 或 MyCrossWord，它就应该接受 MyCrossWord 作为第一个参数。