⚡ JavaFX Observables Tasks

• Java code to display list of employees when button pressed in FXML controller gridpane
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📄 Table of contents

• ⚡ JavaFX Observables Tasks
  • 📄 Table of contents
  • 📚 General info
  • 📷 Screenshots
  • 📶 Technologies
  • 💾 Setup
  • 💻 Code Examples
  • 🆒 Features
  • 📋 Status & To-Do List
  • 👏 Inspiration
  • ✉️ Contact

📚 General info

• Code from Java Programming Masterclass Section 15-285 JavaFx background tasks in Java - see 👏 Inspiration below
• Progress bar shown below list with text detail of data added using simple for loop
• Employee Service now separated
• Progress bar and Progress label binding to

📷 Screenshots

N/A

📶 Technologies

• Java v11
• JavaFX v11 - now a Java Plugin
• class Collections static methods that operate on or return collections.
• interface ObservableList - a list that allows you to track changes
• JavaFX FXML an XML format that enables you to compose JavaFX GUIs like web GUIs in HTML

💾 Setup

• Open folder in an IDE such as IntelliJ. Run from Main.java

💻 Code Examples

• Main.java code to create a list observable then bind values to a FXML ListView

public class Controller {

  private Task<ObservableList<String>> task;

  @FXML
  private ListView listView;

  @FXML
  private ProgressBar progressBar;

  @FXML
  private Label progressLabel;

  public void initialize() {
    task = new Task<ObservableList<String>>() {
      @Override
      protected ObservableList<String> call() throws Exception {

        String[] names = {"Tim Buchalka",
                "Bill Rogers",
                "Jack Jill",
                "Joan Andrews",
                "Mary Johnson",
                "Bob McDonald"};

        ObservableList<String> employees = FXCollections.observableArrayList();

        for(int i=0; i<6; i++) {
          employees.add(names[i]);
          updateMessage(names[i] + " added to the list");
          updateProgress(i + 1, 6);
          Thread.sleep(200);
          updateMessage("list complete");
        }
        return employees;

      }
    };

    progressBar.progressProperty().bind(task.progressProperty());
    progressLabel.textProperty().bind(task.messageProperty());
    listView.itemsProperty().bind(task.valueProperty());
  }

  @FXML
  public void buttonPressed() {
    new Thread(task).start();
  }
}

🆒 Features

• Progress label shows each name as it is added to the list then a 'list complete' message is displayed

📋 Status & To-Do List

• Status: Working
• To-Do: Nothing

👏 Inspiration

• Udemy: Java Programming Masterclass for Software Developers
• SimpleTech TV: Fix JavaFX runtime components are missing and are required to run this application in IntelliJ IDEA

📁 License

• N/A

✉️ Contact

• Repo created by ABateman, email: gomezbateman@yahoo.com