我在eclipse中使用超简单表单，并使用jcalendar1.4中的jdatechooser。我在jframe中添加组件，运行代码，日期选择器似乎是正确的，但是当我选择一个日期时，组件显示的是月份的名称，而不是30/11/2020

package a_vistas;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import com.toedter.calendar.JDateChooser;

public class Test extends JFrame {

    private JPanel contentPane;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Test frame = new Test();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public Test() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        JDateChooser dateChooser = new JDateChooser();
        dateChooser.setDateFormatString("dd/MM/yyyy");
        dateChooser.setBounds(71, 43, 259, 20);
        contentPane.add(dateChooser);
    }
}