运行下面的程序时，不应用 TableCell（数字左对齐而不是右对齐）。单击“更改值”按钮可更正对齐方式。
使用 jdk1.8.0-ea-b114
我错过了什么明显的东西还是一个错误？
import java.util.Arrays;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;
public class TestFX extends Application {
public static void main(String[] args) {
launch(TestFX.class);
}
@Override
public void start(final Stage stage) throws Exception {
MyTable table = new MyTable();
table.table.getItems().addAll(Arrays.asList(new Item(0), new Item(1), new Item(-1)));
Scene scene = new Scene(table);
stage.setScene(scene);
stage.show();
}
static class MyTable extends VBox {
private final Button button = new Button("Change Values");
private final TableView<Item> table = new TableView<>();
MyTable() {
super();
TableColumn<Item, Double> value = new TableColumn<>("Value");
value.setCellValueFactory(new PropertyValueFactory<>("value"));
value.setCellFactory((p) -> new NumberTableCell<>());
table.getColumns().add(value);
button.setOnMouseClicked(this::changeValues);
getChildren().addAll(button, table);
}
public void changeValues(MouseEvent e) {
for (Item i : table.getItems()) {
i.value.set(i.value.get() + 1);
}
}
}
public static class Item {
private final DoubleProperty value;
public Item(double value) { this.value = new SimpleDoubleProperty(value); }
public DoubleProperty valueProperty() { return value; }
}
static class NumberTableCell<T> extends TableCell<T, Double> {
@Override
protected void updateItem(Double item, boolean empty) {
super.updateItem(item, empty);
if (empty || item == null) {
setText(null);
setTextFill(null);
} else {
setText(String.valueOf(item));
setAlignment(Pos.CENTER_RIGHT);
}
}
}
}