Java Swing - 如何使用JComboBox从数组调用信息

import java.awt.Component;

import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Main extends JPanel {
  private static final MyData[] data = { new MyData("Monday", 1, false),
      new MyData("Tuesday", 2, false), new MyData("Wednesday", 3, false),
      new MyData("Thursday", 4, false), new MyData("Friday", 5, false),
      new MyData("Saturday", 6, true), new MyData("Sunday", 7, true), };
  JComboBox<MyData> myCombo = new JComboBox<MyData>(data);
  JTextField textField = new JTextField(10);
  JTextField valueField = new JTextField(10);
  JTextField weekendField = new JTextField(10);

  public Main() {
    add(myCombo);
    add(new JLabel("text:"));
    add(textField);
    add(new JLabel("value:"));
    add(valueField);
    add(new JLabel("weekend:"));
    add(weekendField);

    myCombo.setRenderer(new DefaultListCellRenderer() {
      @Override
      public Component getListCellRendererComponent(JList list, Object value,
          int index, boolean isSelected, boolean cellHasFocus) {
        String text = value == null ? "" : ((MyData) value).getText();
        return super.getListCellRendererComponent(list, text, index,
            isSelected, cellHasFocus);
      }
    });
    myCombo.setSelectedIndex(-1);

    myCombo.addActionListener(e -> {
      MyData myData = (MyData) myCombo.getSelectedItem();
      textField.setText(myData.getText());
      valueField.setText(String.valueOf(myData.getValue()));
      weekendField.setText(String.valueOf(myData.isWeekend()));
    });
  }

  public static void main(String[] args) {
    Main mainPanel = new Main();
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(mainPanel);
    frame.pack();
    frame.setVisible(true);
  }
}

class MyData {
  String text;
  int value;
  boolean weekend;

  MyData(String text, int value, boolean weekend) {
    this.text = text;
    this.value = value;
    this.weekend = weekend;
  }

  public String getText() {
    return text;
  }

  public int getValue() {
    return value;
  }

  public boolean isWeekend() {
    return weekend;
  }
}