JavaFX table view headers bug?

Question

Hi,
I created simple application with table view and I have problem with the way that table view headers are displaying.
When table view is not focused headers are improper width but when table get focus then headers width is changing and everything is working as expected.
Before table view get focus:
http://imageshack.us/a/img841/6853/j9u9.png
After table view get focus:
http://imageshack.us/a/img43/922/169f.png
Best regards,
Lukas

Answer 1

You should run this app without problems becouse it is embeded SQLLite databse. Look into SqlLiteDB class. You can even delete database.db file becouse sqllite driver will automatically create database.
I check your example and is perfect becouse is showing my issue You should only make small change that you skipped: ( table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY); )
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.MapValueFactory;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import java.util.*;
public class Main extends Application {
    @Override
    public void start(Stage primaryStage) {
        final AnchorPane root = new AnchorPane();
        root.setPadding(new Insets(10));
        final HBox controls = new HBox(5);
        final Button getDataButton = new Button("load data");
        final TextField textField = new TextField();
        final TableView<Map> table = new TableView<>();
        table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
        getDataButton.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                DataSource dataSource = new DataSource();
                table.getColumns().clear();
                table.getColumns().addAll(dataSource.getTableColumns());
                table.setItems(dataSource.getQueryResult());
        controls.getChildren().addAll(getDataButton, textField);
        AnchorPane.setTopAnchor(controls, 10.0);
        AnchorPane.setLeftAnchor(controls, 10.0);
        AnchorPane.setRightAnchor(controls, 10.0);
        AnchorPane.setTopAnchor(table, 45.0);
        AnchorPane.setRightAnchor(table, 10.0);
        AnchorPane.setLeftAnchor(table, 10.0);
        AnchorPane.setBottomAnchor(table, 10.0);
        root.getChildren().addAll(controls, table);
        primaryStage.setScene(new Scene(root, 1000, 1000));
        primaryStage.show();
    public static class DataSource {
        public List<TableColumn<Map, Object>> getTableColumns() {
            TableColumn<Map, Object> idColumn = new TableColumn<>("ID");
            idColumn.setCellValueFactory(new MapValueFactory<Object>("ID"));
            TableColumn<Map, Object> nameColumn = new TableColumn<>("NAME");
            nameColumn.setCellValueFactory(new MapValueFactory<Object>("NAME"));
            return Arrays.asList(idColumn, nameColumn);
        public ObservableList<Map> getQueryResult() {
            List<Map> result = new ArrayList<>();
            for (int i = 0; i < 200; i++) {
                Map<String, Object> row = new HashMap<>();
                row.put("ID", i);
                row.put("NAME", "Name " + i);
                result.add(row);
            return FXCollections.observableArrayList(result);
    public static void main(String[] args) {
        launch(args);