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Java Swing - 如何在“enter”键被按下后添加到JList

jlist 【jlist】
我们想知道如何在“enter”键被按下后添加到JList。
代码展示 运行结果 
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.DefaultListModel;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.KeyStroke;

public class Main extends JFrame {
  JComboBox<String> comboBox;
  DefaultListModel<String> model;

  Main() {
    comboBox = new JComboBox<>(new String[] { "111", "222", "333" });
    JList<String>  list = new JList<>(model = new DefaultListModel<>());
    add(comboBox, BorderLayout.SOUTH);
    add(new JScrollPane(list));

    addKeyBindings((JComponent) getContentPane());
    addKeyBindings(comboBox);

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    pack();
    setVisible(true);
  }

  private void addKeyBindings(JComponent c) {
    c.getInputMap(JComboBox.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(
        KeyStroke.getKeyStroke("ENTER"), "doSomething");
    c.getActionMap().put("doSomething", new AbstractAction() {

      @Override
      public void actionPerformed(ActionEvent e) {
        Object selectedItem = comboBox.getSelectedItem();
        if (selectedItem != null) {
          model.addElement((String) selectedItem);
        }
      }
    });
  }

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

}