有没有办法垂直向上移动JTextArea的插入符号？

import javax.swing.*;
import javax.swing.text.*;

public class VerticalCaretExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Vertical Caret Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JTextArea textArea = new JTextArea();
        textArea.setText("This is a JTextArea with vertical caret movement.");

        DefaultCaret caret = (DefaultCaret) textArea.getCaret();
        caret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE);
        caret.setBlinkRate(500); // 设置插入符号的闪烁速率

        JScrollPane scrollPane = new JScrollPane(textArea);
        frame.getContentPane().add(scrollPane);

        frame.setSize(400, 300);
        frame.setVisible(true);
    }
}