Java Swing - 如何禁用JList与JCheckBox

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;

public class Main {

  public static void main(String args[]) {
    String ITEMS[] = { "Black", "Blue", "Green", "Orange", "Purple", "Red",
        "White" };
    JList jList = new JList(ITEMS);
    jList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    JScrollPane scroll = new JScrollPane(jList);
    scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
    scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

    JCheckBox chkEnable = new JCheckBox("Enable", true);
    chkEnable.addItemListener(new ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        jList.setEnabled(chkEnable.isSelected());
      }
    });

    JFrame f = new JFrame("Colors");
    Container contentPane = f.getContentPane();
    contentPane.setLayout(new BorderLayout());
    contentPane.add(scroll, BorderLayout.CENTER);
    contentPane.add(chkEnable, BorderLayout.NORTH);

    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(180, 220);
    f.setLocationRelativeTo(null);
    f.setVisible(true);
  }
}