以编程方式选择下一个列表框项

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

public class ListBoxExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("List Box Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);

        String[] items = {"Item 1", "Item 2", "Item 3", "Item 4", "Item 5"};
        JList<String> listBox = new JList<>(items);
        JScrollPane scrollPane = new JScrollPane(listBox);
        frame.getContentPane().add(scrollPane, BorderLayout.CENTER);

        JButton button = new JButton("Select Next Item");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int selectedIndex = listBox.getSelectedIndex();
                if (selectedIndex< items.length - 1) {
                    listBox.setSelectedIndex(selectedIndex + 1);
                }
            }
        });
        frame.getContentPane().add(button, BorderLayout.SOUTH);

        frame.setVisible(true);
    }
}