package javabeans;import java.awt.*;import javax.swing.border.*;import java.beans.*;import java.awt.event.*;import java.util.*;import javax.swing.*;public class BeanieBaby extends JPanel {  BorderLayout borderLayout1 = new BorderLayout();  private float price;	// 新增加的price屬性聲明  private String allTiedup;	// allTiedUp屬性字段  private transient PropertyChangeSupport propertyChangeListeners = new PropertyChangeSupport(this);  private transient Vector mouseListeners;  JLabel jLabel1 = new JLabel();	// PropertyChangeSupport實(shí)例，用于消息處理  public BeanieBaby() {    try {      jbInit();    }    catch(Exception ex) {      ex.printStackTrace();    }  }  private void jbInit() throws Exception {    jLabel1.setHorizontalAlignment(SwingConstants.CENTER);    jLabel1.setText("BeanBaby");    this.setBackground(Color.red);    this.setBorder(BorderFactory.createRaisedBevelBorder());    this.setLayout(borderLayout1);    this.setPrice(10);    this.getPrice();    this.add(jLabel1,  BorderLayout.CENTER);  }  public float getPrice() {	// price屬性的讀方法getter    return price;  }  public void setPrice(float price) {	// price屬性的寫(xiě)方法setter    this.price = price;  }  public String getAllTiedup() {	// allTiedUp讀方法    return allTiedup;  }  public void setAllTiedup(String allTiedup) {	// allTiedUp寫(xiě)方法     String  oldAllTiedup = this.allTiedup;     this.allTiedup = allTiedup;     // 利用PropertyChangeSupport通知監(jiān)聽(tīng)器屬性值變了！     propertyChangeListeners.firePropertyChange("allTiedup", oldAllTiedup, allTiedup);   }   // 事件監(jiān)聽(tīng)器的注銷方法   public synchronized void removePropertyChangeListener(PropertyChangeListener l) {     super.removePropertyChangeListener(l);     propertyChangeListeners.removePropertyChangeListener(l);   }   // 事件監(jiān)聽(tīng)器的注冊(cè)方法   public synchronized void addPropertyChangeListener(PropertyChangeListener l) {     super.addPropertyChangeListener(l);     propertyChangeListeners.addPropertyChangeListener(l);   }  public synchronized void removeMouseListener(MouseListener l) {    super.removeMouseListener(l);    if (mouseListeners != null && mouseListeners.contains(l)) {      Vector v = (Vector) mouseListeners.clone();      v.removeElement(l);      mouseListeners = v;    }  }  public synchronized void addMouseListener(MouseListener l) {    super.addMouseListener(l);    Vector v = mouseListeners == null ? new Vector(2) : (Vector) mouseListeners.clone();    if (!v.contains(l)) {      v.addElement(l);      mouseListeners = v;    }  }  protected void fireMouseClicked(MouseEvent e) {    if (mouseListeners != null) {      Vector listeners = mouseListeners;      int count = listeners.size();      for (int i = 0; i < count; i++) {        ((MouseListener) listeners.elementAt(i)).mouseClicked(e);      }    }  }  protected void fireMouseEntered(MouseEvent e) {    if (mouseListeners != null) {      Vector listeners = mouseListeners;      int count = listeners.size();      for (int i = 0; i < count; i++) {        ((MouseListener) listeners.elementAt(i)).mouseEntered(e);      }    }  }  protected void fireMouseExited(MouseEvent e) {    if (mouseListeners != null) {      Vector listeners = mouseListeners;      int count = listeners.size();      for (int i = 0; i < count; i++) {        ((MouseListener) listeners.elementAt(i)).mouseExited(e);      }    }  }  protected void fireMousePressed(MouseEvent e) {    if (mouseListeners != null) {      Vector listeners = mouseListeners;      int count = listeners.size();      for (int i = 0; i < count; i++) {        ((MouseListener) listeners.elementAt(i)).mousePressed(e);      }    }  }  protected void fireMouseReleased(MouseEvent e) {    if (mouseListeners != null) {      Vector listeners = mouseListeners;      int count = listeners.size();      for (int i = 0; i < count; i++) {        ((MouseListener) listeners.elementAt(i)).mouseReleased(e);      }    }  }}