如何用数组中的值填充TableView的Column

Question

我有ObservableList类GameLogEntry的实例：

public class GameLogEntry {
    private int gameNumber;

    private int chosenStratA;
    private int chosenStratB;

    private Double[] scoresByB;
    private Double[] scoresByA;

    private double higherPrice;
    private double lowerPrice;
    private double averagePrice;

    private int maxIndex;

在我的程序中，我使用此ObservableList中的值填充TableView的列。

我的专栏：

@FXML
    private TableColumn<GameLogEntry, String> colGameNum;

    @FXML
    private TableColumn<GameLogEntry, String> colChosenStratA;

    @FXML
    private TableColumn<GameLogEntry, String> colScoreByBOne;

    @FXML
    private TableColumn<GameLogEntry, String> colScoreByBTwo;

    @FXML
    private TableColumn<GameLogEntry, String> colChosenStratB;

    @FXML
    private TableColumn<GameLogEntry, String> colScoreByAOne;

    @FXML
    private TableColumn<GameLogEntry, String> colScoreByATwo;

    @FXML
    private TableColumn<GameLogEntry, String> colLowerPrice;

    @FXML
    private TableColumn<GameLogEntry, String> colHigherPrice;

    @FXML
    private TableColumn<GameLogEntry, String> colAveragePrice;

我正在initialize方法中这样做：

colGameNum.setCellValueFactory(new PropertyValueFactory<GameLogEntry, String>("gameNumber"));
colChosenStratA.setCellValueFactory(new PropertyValueFactory<GameLogEntry, String>("chosenStratA"));
colChosenStratB.setCellValueFactory(new PropertyValueFactory<GameLogEntry, String>("chosenStratB"));
colHigherPrice.setCellValueFactory(new PropertyValueFactory<GameLogEntry, String>("higherPrice"));
colLowerPrice.setCellValueFactory(new PropertyValueFactory<GameLogEntry, String>("lowerPrice"));
colAveragePrice.setCellValueFactory(new PropertyValueFactory<GameLogEntry, String>("averagePrice"));

但是我还需要填充CS（B1），CS（B2），CS（A1）和CS（A2）列。

CS（B1）应该用scoresByB [0]，

填充

CS（B2）-具有scoresByB [1]，

CS（A1）-具有scoresByA [0]，

CS（A2）-具有scoresByA [1]。

问题是-我可以使用与其他值相同的简单方法来做到这一点吗？如果没有，我该如何以其他方式呢？

Answer 1

只需自己实施工厂。您可以创建一个辅助方法来避免重复代码：

static <S, T> Callback<TableColumn.CellDataFeatures<S, T>, ObservableValue<T>> createArrayValueFactory(Function<S, T[]> arrayExtractor, final int index) {
    if (index < 0) {
        return cd -> null;
    }
    return cd -> {
        T[] array = arrayExtractor.apply(cd.getValue());
        return array == null || array.length <= index ? null : new SimpleObjectProperty<>(array[index]);
    };
}

colScoreByBOne.setCellValueFactory(createArrayValueFactory(GameLogEntry::getScoresByB, 0));
colScoreByBTwo.setCellValueFactory(createArrayValueFactory(GameLogEntry::getScoresByB, 1));
colScoreByAOne.setCellValueFactory(createArrayValueFactory(GameLogEntry::getScoresByA, 0));
colScoreByATwo.setCellValueFactory(createArrayValueFactory(GameLogEntry::getScoresByA, 1));

要使其正常工作，您需要将列的类型更改为TableColumn<GameLogEntry, Double>。 （实际上，您应该更改列的 all 的值类型，因为没有单个属性属于String类型；所有属性都属于{{1 }}或Double。）