PropertyChangeSupport

1

import java.beans.PropertyChangeListener;

import java.beans.PropertyChangeSupport;

/**

 * @author huhy

 *

 */

public class MyBean {

    private String id;

    private String name;

    private PropertyChangeSupport changeSupport = new PropertyChangeSupport(

            this);

    public MyBean(String id, String name) {

        this.id = id;

        this.name = name;

    }

    public String getId() {

        return id;

    }

    public void setId(String id) {

        String oldId = this.id;

        this.id = id;

        changeSupport.firePropertyChange("id", oldId, id);

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        String oldName = this.name;

        this.name = name;

        changeSupport.firePropertyChange("name", oldName, name);

    }

    public void addPropertyChangeListener(PropertyChangeListener listener) {

        changeSupport.addPropertyChangeListener(listener);

    }

    public void removePropertyChangeListener(PropertyChangeListener listener) {

        changeSupport.removePropertyChangeListener(listener);

    }

}

2

import java.awt.GridLayout;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import javax.swing.BorderFactory;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

public class Panel1 extends JPanel implements PropertyChangeListener {

    private static final long serialVersionUID = 1L;

    private MyBean mybean;

    private JLabel nameLabel = new JLabel("name1");

    private JTextField nameInput = new JTextField();;

    private JLabel idLabel = new JLabel("id1");

    private JTextField idInput = new JTextField();

    public Panel1(MyBean mybean) {

        this.mybean = mybean;

        mybean.addPropertyChangeListener(this);

        initialized();

    }

    private void initialized() {

        setBorder(BorderFactory.createTitledBorder("输出1"));

        setLayout(new GridLayout(2, 2));

        idInput.setText(mybean.getId());

        nameInput.setText(mybean.getName());

        add(idLabel);

        add(idInput);

        add(nameLabel);

        add(nameInput);

    }

    @Override

    public void propertyChange(PropertyChangeEvent evt) {

        if (evt.getSource() == mybean) {

            idInput.setText(mybean.getId());

            nameInput.setText(mybean.getName());

        }

    }

}

3

import java.awt.GridLayout;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import javax.swing.BorderFactory;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

public class Panel2 extends JPanel implements PropertyChangeListener {

    private static final long serialVersionUID = 1L;

    private MyBean mybean;

    private JLabel nameLabel = new JLabel("name2");

    private JTextField nameInput = new JTextField();;

    private JLabel idLabel = new JLabel("id2");

    private JTextField idInput = new JTextField();

    public Panel2(MyBean mybean) {

        this.mybean = mybean;

        mybean.addPropertyChangeListener(this);

        initialized();

    }

    private void initialized() {

        setBorder(BorderFactory.createTitledBorder("输出2"));

        setLayout(new GridLayout(2, 2));

        idInput.setText(mybean.getId());

        nameInput.setText(mybean.getName());

        add(idLabel);

        add(idInput);

        add(nameLabel);

        add(nameInput);

    }

    @Override

    public void propertyChange(PropertyChangeEvent evt) {

        if (evt.getSource() == mybean) {

            idInput.setText(mybean.getId());

            nameInput.setText(mybean.getName());

        }

    }

}

4

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTextField;

/**

 * @author huhy

 *

 */

public class PropertyChangeSupportTest extends JFrame {

    private MyBean mybean = new MyBean("123", "helloKitty");

    private JPanel panel = new JPanel(new GridLayout(1, 3));

    private JTextField id = new JTextField();

    private JTextField name = new JTextField();

    private JButton button = new JButton("click");

    public PropertyChangeSupportTest() {

        initialized();

        setLayout(new BorderLayout());

        panel.setBorder(BorderFactory.createTitledBorder("输入"));

        add(panel, BorderLayout.NORTH);

        JPanel panel1 = new Panel1(mybean);

        panel1.setPreferredSize(new Dimension(50, 80));

        JPanel panel2 = new Panel2(mybean);

        panel2.setPreferredSize(new Dimension(50, 100));

        add(panel1, BorderLayout.CENTER);

        add(panel2, BorderLayout.SOUTH);

        setSize(300, 300);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setVisible(true);

    }

    private void initialized() {

        id.setText(mybean.getId());

        name.setText(mybean.getName());

        button.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                mybean.setId(id.getText());

                mybean.setName(name.getText());

            }

        });

        panel.add(id);

        panel.add(name);

        panel.add(button);

    }

    public static void main(String args[]) {

        PropertyChangeSupportTest test = new PropertyChangeSupportTest();

    }

}