gistfile1.java

public class Main {

  public static main(String... args) {

    Map<Integer, Map<Position, Box>> backingMap = Maps.newHashMap();
    Supplier<Map<Position, Box>> factory = newMapFactory();
    Table<Integer, Position, Box> table = Tables.newCustomTable(backingMap, factory);

    Integer rowKey = 0;
    Position columnKey = getPosition();
    Box value = new Box();

    // put
    table.put(rowKey, columnKey, value);

    // get
    Box box = table.get(rowKey, columnKey);

  }

  static <C, V> Supplier<Map<C, V>> newMapFactory() {
    return new MapFactory<C, V>();
  }

  static final class MapFactory<C, V> implements Supplier<Map<C, V>> {

    public Map<C, V> get() {
      return Maps.newHashMap();
    }  

  }
}