Question

在我的javaFx应用程序中，我试图将我的进度条附加到一个应该从另一个类执行某些方法的任务，当我单击按钮时，我似乎无法通过这些方法执行任务这个任务。

这是我用户输入的两个单词的搜索页面控制器

FXML Controller class

public class WordComparePageController implements Initializable  {
@FXML
private TextField wordOneText;
@FXML
private TextField wordTwoText;
@FXML
private Button pairSearchButton;
@FXML
private TextField wordPairText;

WordNetMeasures wordNetMeasures = new WordNetMeasures();

private double distance;
private double linDistance;
private double leskDistance;

DecimalFormat df = new DecimalFormat("#.0000");
DecimalFormat pf = new DecimalFormat("#.0");
@FXML
private ProgressBar progressBar;
@FXML
private ProgressIndicator progressIndicator;

@Override
public void initialize(URL url, ResourceBundle rb) {}

绑定进度条任务

@FXML
private void onSearchButtonClicked(ActionEvent event) throws    InstantiationException, IllegalAccessException {

   progressBar.progressProperty().bind(taskPS.progressProperty());
       progressIndicator.progressProperty().bind(taskPS.progressProperty());

    Thread th = new Thread(taskPS);
    th.setDaemon(true);
    th.start();
            }

  Task<Void> taskPS = new Task<Void>() {

    @Override
    protected Void call() throws InstantiationException, IllegalAccessException {
       updateProgress(0, 1);

        distance = wordNetMeasures.searchForWord(wordOneText.getText(), wordTwoText.getText());
        linDistance = wordNetMeasures.linMethod(wordOneText.getText(), wordTwoText.getText());
        leskDistance =   wordNetMeasures.leskMethod(wordOneText.getText(), wordTwoText.getText());
       updateProgress(1, 40);
        ProjectProperties.getInstance().setPathResult(distance);

        System.out.println("Distance: = " + ProjectProperties.getInstance().getPathResult());

    ProjectProperties.getInstance().setWordText(wordOneText.getText() + "," + wordTwoText.getText());

        String wordNetDistance = String.valueOf(df.format(distance));
        ProjectProperties.getInstance().setPathWordNetText(wordNetDistance);
        ProjectProperties.getInstance().setLinWordNetText((String.valueOf(df.format(linDistance))));
        ProjectProperties.getInstance().setLinResult(linDistance);
        ProjectProperties.getInstance().setPathResult(distance);
        ProjectProperties.getInstance().setLeskResult(leskDistance);
            ProjectProperties.getInstance().setLeskWordNetText((String.valueOf(df.forma  t(leskDistance))));

        updateProgress(40, 70);



        Database databaseConnection = new Database();
        try {
            databaseConnection.getConnection();
             databaseConnection.addWordNetToDatabase(ProjectProperties.getInstance().getWordText(), distance, linDistance, leskDistance);
            updateProgress(100, 100);
        } catch (SQLException ex) {
            Logger.getLogger(WordComparePageController.class.getName()).log(Level.SEVERE, null, ex);
        }

        return null;
    }
};

}

具有任务的wordnet度量方法的类

public class WordNetMeasures {


private static ILexicalDatabase db = new NictWordNet();
private static RelatednessCalculator[] rcs = {
    new HirstStOnge(db), new LeacockChodorow(db), new Lesk(db), new WuPalmer(db),
    new Resnik(db), new JiangConrath(db), new Lin(db), new Path(db)
};

private static RelatednessCalculator pathMethod = new Path(db);
private static RelatednessCalculator linMethod = new Lin(db);
private static RelatednessCalculator leskMethod = new Resnik(db);
private static double distance;
private static double linDistance;
private static double leskDistance;



public static double searchForWord(String word1, String word2) {
    WS4JConfiguration.getInstance().setMFS(true);
    RelatednessCalculator rc = pathMethod;
    distance  = rc.calcRelatednessOfWords(word1, word2);

    return distance;
}


public static double linMethod(String word1, String word2) {
    WS4JConfiguration.getInstance().setMFS(true);
    RelatednessCalculator rc = linMethod;
    linDistance = rc.calcRelatednessOfWords(word1, word2);

    return linDistance;
}


public  static double leskMethod(String word1, String word2) {
    WS4JConfiguration.getInstance().setMFS(true);
    RelatednessCalculator rc = leskMethod;
    leskDistance = rc.calcRelatednessOfWords(word1, word2);

    return leskDistance;
}


/**
 * Gets the ontology path for the word passed in
 * @param word
 * @return
 * @throws JWNLException 
 */
public String[] getWordNetPath(String word) throws JWNLException {

    String[] wordResults = new String[500];
    RiWordnet wordnet = new RiWordnet();
    String[] posOfWord = wordnet.getPos(word);
    int[] wordIds = wordnet.getSenseIds(word, posOfWord[0]);
    wordResults = wordnet.getHypernymTree(wordIds[0]);

    return wordResults;
}

/**
 * Gets the set of synsets for the word passed in
 * @param word
 * @return 
 */
public String[] getWordNetSynset(String word) {
    RiWordnet wordnet = new RiWordnet();
    String[] posOfWord = wordnet.getPos(word);
    int[] wordIds = wordnet.getSenseIds(word, posOfWord[0]);
    String[] wordResults = wordnet.getSynset(wordIds[0]);

    return wordResults;
}

}

Answer 1

Task只能使用一次。要重用它，您必须重新实例化它，或者创建一个扩展Service的类。

Service负责创建和管理Task，并且无需重新附加progressProperty的绑定。

必须将ProgressBar添加到Scene才能显示

public class TestApp extends Application {

    private Stage progressStage;

    @Override
    public void start(Stage primaryStage) throws IOException {

        Button btn = new Button("start task");

        TaskService service = new TaskService();
        service.setOnScheduled(e -> progressStage.show());
        service.setOnSucceeded(e -> progressStage.hide());

        ProgressBar progressBar = new ProgressBar();
        progressBar.progressProperty().bind(service.progressProperty());

        progressStage = new Stage();
        progressStage.setScene(new Scene(new StackPane(progressBar), 300, 300));
        progressStage.setAlwaysOnTop(true);

        btn.setOnAction(e -> service.restart());

        primaryStage.setScene(new Scene(new StackPane(btn), 300, 300));
        primaryStage.show();
    }

    private class TaskService extends Service<Void> {

        @Override
        protected Task<Void> createTask() {
            Task<Void> task = new Task<Void>() {

                @Override
                protected Void call() throws Exception {

                    for (int p = 0; p < 100; p++) {
                        Thread.sleep(40);
                        updateProgress(p, 100);
                    }
                    return null;
                }
            };
            return task;
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}

任务/进度条JavaFX应用程序

1 个答案: