listing29.2.java

java 完全探索的随书源码

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
public class TextReader extends TextField {
   // default constructor for this Bean.  This is the constructor that an
   // application builder (such as Visual Basic) would use.
   public TextReader() {
      this( "", 40 );
   }

   // custom constructor for this Bean.  This is the constructor that you
   // would likely use if you were doing your coding from scratch.
   public TextReader( String InputText, int Width ) {
      super( InputText, Width );
      this.InputText = InputText;
      this.Width = Width;
      setEditable( true );

      // update the InputText property when the enter key is
      // pressed within the TextField
      this.addActionListener( new ActionListener() {
        public void actionPerformed( ActionEvent e ) {
          setInputText(getText());
        }
      });
   }

   // this Bean's properties.
   protected String InputText;
   protected int Width;

   // getter method for the InputText property.
   public synchronized String getInputText() {
     return InputText;
   }

   // setter method for the InputText property.
   public synchronized void setInputText( String newText ) {
      String oldText = InputText;
      InputText = newText;
      setText( InputText );
// uncomment this statement after the Listing 29.4 additions are made
//    changeAgent.firePropertyChange( "inputText", new String( oldText ),
//                                    new String( newText ) );
  }
}