Java Swing - 如何使用Model來同步JList和JComboBox

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import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.Timer;
public class Main {
  public static void main(String[] args) {
    int TIMER_DELAY = 2000;
    String[] data = { "A", "B", "C", "D" };
    DefaultComboBoxModel<String> model = new DefaultComboBoxModel<>(data);
    JComboBox<String> combobox = new JComboBox<>(model);
    JList<String> jlist = new JList<>(model);
    new Timer(TIMER_DELAY, new ActionListener() {
      private int count = 0;
      public void actionPerformed(ActionEvent e) {
        model.addElement("count: " + count);
        count++;
      }
    }).start();
    JPanel comboPanel = new JPanel();
    comboPanel.add(combobox);
 
 
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