JavaFX to-do list application with ListView

Last update on December 21 2024 09:40:14 (UTC/GMT +8 hours)

Write a JavaFX program to develop a to-do list application using a ListView. Allow users to add, remove, and edit items in the list.

Sample Solution:

JavaFx Code:

//Main.java

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

    private ObservableList<String> items;
    private ListView<String> listView;
    private TextField newItemField;
    private int editIndex = -1; // Initialize to -1

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

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("To-Do List");

        items = FXCollections.observableArrayList();
        listView = new ListView<>(items);
        newItemField = new TextField();
        Button addButton = new Button("Add");
        Button removeButton = new Button("Remove");
        Button editButton = new Button("Edit");

        addButton.setOnAction(event -> {
            String newItem = newItemField.getText();
            if (!newItem.isEmpty()) {
                if (editIndex != -1) {
                    items.set(editIndex, newItem); // Edit existing item
                    editIndex = -1; // Reset edit index
                } else {
                    items.add(newItem); // Add new item
                }
                newItemField.clear();
            }
        });

        removeButton.setOnAction(event -> {
            int selectedIndex = listView.getSelectionModel().getSelectedIndex();
            if (selectedIndex >= 0) {
                items.remove(selectedIndex);
            }
        });

        editButton.setOnAction(event -> {
            int selectedIndex = listView.getSelectionModel().getSelectedIndex();
            if (selectedIndex >= 0) {
                newItemField.setText(items.get(selectedIndex));
                editIndex = selectedIndex; // Set edit index
            }
        });

        HBox inputBox = new HBox(10);
        inputBox.getChildren().addAll(newItemField, addButton, removeButton, editButton);

        VBox root = new VBox(10);
        root.getChildren().addAll(inputBox, listView);

        Scene scene = new Scene(root, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

The above JavaFX program creates a basic to-do list application with the ability to add, remove, and edit items in the list using a ListView. You can input a new item, select an existing item to edit, and click the corresponding buttons to perform actions on the to-do list.

Sample Output:

Flowchart:

Java Code Editor:

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