What are the methods for implementing a drop-down list in Java?

In Java, implementing a dropdown list is typically done using Swing or JavaFX programming. Here are two methods:

1. Implement a drop-down list using Swing.

import javax.swing.*;
import java.awt.*;

public class DropdownListExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Dropdown List Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        String[] options = {"Option 1", "Option 2", "Option 3"};
        JComboBox<String> dropdown = new JComboBox<>(options);
        
        frame.add(dropdown, BorderLayout.CENTER);
        
        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}

1. Implement a dropdown list using JavaFX.

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class DropdownListExample extends Application {
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Dropdown List Example");

        ComboBox<String> dropdown = new ComboBox<>();
        dropdown.getItems().addAll("Option 1", "Option 2", "Option 3");

        VBox vbox = new VBox(dropdown);

        Scene scene = new Scene(vbox, 300, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

These are two common methods for implementing dropdown lists in Java, using Swing and JavaFX respectively. Depending on specific requirements, you can choose which method to use.