Java Swing - 如何使用ListModel作为模型类型从JList中删除项目

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

public class Main {
  private String[] elements = { "Monday", "Tueday", "Wednesday" };
  private JList made_list = new JList();

  public Main() {
    made_list.setModel(new DefaultListModel());
    for (String element : elements) {
      ((DefaultListModel) made_list.getModel()).addElement(element);
    }

    JButton removeItemBtn = new JButton("Remove Item");
    removeItemBtn.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        removeActionPerformed(e);
      }
    });

    JPanel panel = new JPanel();
    panel.add(new JScrollPane(made_list));
    panel.add(removeItemBtn);

    JOptionPane.showMessageDialog(null, panel);
  }

  private void removeActionPerformed(ActionEvent e) {
    System.out.println("made_list's model: " + made_list.getModel());
    System.out.println("Model from a fresh JList: " + new JList().getModel());
    DefaultListModel model = (DefaultListModel) made_list.getModel();
    if (model.size() > 0) {
      model.remove(0);
    }
  }

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