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package TIJ4_code.innerclasses;

//: innerclasses/Games.java

// Using anonymous inner classes with the Game framework.

import static TIJ4_code.net.mindview.util.Print.*;

interface Game { boolean move(); }

interface GameFactory { Game getGame(); }

class Checkers implements Game {

private Checkers() {}

private int moves = 0;

private static final int MOVES = 3;

public boolean move() {

print("Checkers move " + moves);

return ++moves != MOVES;

}

public static GameFactory factory = new GameFactory() {

public Game getGame() { return new Checkers(); }

};

}

class Chess implements Game {

private Chess() {}

private int moves = 0;

private static final int MOVES = 4;

public boolean move() {

print("Chess move " + moves);

return ++moves != MOVES;

}

public static GameFactory factory = new GameFactory() {

public Game getGame() { return new Chess(); }

};

}

public class Games {

public static void playGame(GameFactory factory) {

Game s = factory.getGame();

while(s.move())

;

}

public static void main(String[] args) {

playGame(Checkers.factory);

playGame(Chess.factory);

}

} /* Output:

Checkers move 0

Checkers move 1

Checkers move 2

Chess move 0

Chess move 1

Chess move 2

Chess move 3

*///:~