JavaFx：使用ObservableMap填充TableView

Question

我在互联网上找不到正确的答案，如何用ObservableMap作为MapProperty填充tableviw。我想在按值排序的tableview中显示文章。

public class Article {

    private MapProperty<String, Integer> article = new SimpleMapProperty<>(); 


        public final ObservableMap<String, Integer> geArticle() {
            return article.get();
        }

        public final void setArticle(ObservableMap<String, Integer> value) {
            article.set(value);
        }

        public MapProperty<String, Integer> articleProperty() {
            return article;
        }
    }

 public class TableController extends VBox implements Initializable{

    @FXML private TableView<Article> tableView;
    @FXML private TableColumn<Article, String> article;
    @FXML private TableColumn<Article, Integer> count;

    ......

    @Override
        public void initialize(URL location, ResourceBundle resources) {
            article.setCellValueFactory(new PropertyValueFactory<Article, String>("article"));
            count.setCellValueFactory(new PropertyValueFactory<Article, Integer>("count"));
    }
  }

Answer 1

一种简单的方法是遍历keySet并创建一个文章列表：

ObservableList<Article> list =  FXCollections.observableArrayList();

    for(String key : article.keySet()){
        Article art = new Article(key, article.get(key));
        list.add(art);
    }

然后将表Items设置为list。

而如果要对列表排序，在文章可比中实现，使用collections.sort（list）；

public class Article implements Comparable<Article> {
       //...
        public int compareTo(Article compareArticle ) {

              //ascending order
              return this.value - compareArticle.getValue();
        }

    }