您可以使用PropertyChangeListener，实际上每个组件都内置了一个。例如：
import java.awt.event.*;import java.beans.PropertyChangeEvent;import java.beans.PropertyChangeListener;import javax.swing.*;@SuppressWarnings("serial")public class Example extends Jframe { public Example() { super(); OuterView theGUI = new OuterView(); setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); setResizable(false); add(theGUI); pack(); setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { new Example(); } }); }}class OuterView extends JPanel { private String innerValue = ""; public OuterView() { super(); InnerView innerPanel = new InnerView(); innerPanel.addPropertyChangeListener(new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent evt) { if (evt.getPropertyName().equals(InnerView.COMBO_CHANGED)) { innerValue = evt.getNewValue().toString(); System.out.println("new value from inside of OuterView: " + innerValue); } } }); JButton button = new JButton("display OuterView's model"); button.addActionListener(new ButtonListener()); add(innerPanel); add(button); } private class ButtonListener implements ActionListener { @Override public void actionPerformed(ActionEvent ae) { System.out.println("button was clicked. innerValue: " + innerValue); } }}class InnerView extends JPanel { public static final String COMBO_CHANGED = "Combo Changed"; // private SwingPropertyChangeSupport pcSupport = new // SwingPropertyChangeSupport(this); String oldValue = ""; public InnerView() { super(); String[] items = new String[] { "item 1", "item 2", "item 3" }; JComboBox comboBox = new JComboBox(items); comboBox.addActionListener(new ComboBoxListener()); add(comboBox); } private class ComboBoxListener implements ActionListener { @Override public void actionPerformed(ActionEvent ae) { String text = ((JComboBox) ae.getSource()).getSelectedItem() .toString(); firePropertyChange(COMBO_CHANGED, oldValue, text); oldValue = text; System.out.println("store " + text + " in InnerView's model"); } }}
