listing29.4.java

来自「java 完全探索的随书源码」· Java 代码 · 共 22 行

   // setter method for the InputText property.
   public synchronized void setInputText( String newText ) {
      String oldText = InputText;
      InputText = newText;
      setText( InputText );
      changeAgent.firePropertyChange( "inputText", new String( oldText ),
                                      new String( newText ) );
   }

   // these two methods allow this Bean to have bound properties.
   public void addPropertyChangeListener( PropertyChangeListener l ) {
      changeAgent.addPropertyChangeListener( l );
   }

   public void removePropertyChangeListener( PropertyChangeListener l ) {
      changeAgent.removePropertyChangeListener( l );
   }

   protected PropertyChangeSupport changeAgent = 
     new PropertyChangeSupport( this );