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javafxtableviewtreemap

JavaFX fill tableView with treeMap data

I have a TableView with two columns, a TreeMap<String, String> and an ObservableMap. I want to fill the TableView with my TreeMap data. But tableview.setItems(observableMap) does not work because setItems expects an ObservableList. I tried the same with observableHashMap which also didn't work. What can I do to fill my TableView with my data in the TreeMap?

Solution

  • Use the keys as item type for the TableView and use the cellValueFactory for the value column to extract the value:

    Map<String, String> map = ...

TableView<String> tableView = new TableView();

// fill table with keys
tableView.getItems().addAll(map.keySet());

TableColumn<String, String> keyColumn = new TableColumn<>("key");
keyColumn.setCellValueFactory(cd -> new SimpleStringProperty(cd.getValue()));

TableColumn<String, String> valueColumn = new TableColumn<>("value");
valueColumn.setCellValueFactory(cd -> new SimpleStringProperty(map.get(cd.getValue())));

tableView.getColumns().addAll(keyColumn, valueColumn);

    Alternatively you could also use a TableView<Map.Entry<String, String>>

    ...

// fill table with keys
tableView.getItems().addAll(map.entrySet());

TableColumn<Map.Entry<String, String>, String> keyColumn = new TableColumn<>("key");
keyColumn.setCellValueFactory(new PropertyValueFactory<>("key"));

TableColumn<Map.Entry<String, String>, String> valueColumn = new TableColumn<>("value");
valueColumn.setCellValueFactory(new PropertyValueFactory<>("value"));

...