accounttextview.java

java 编程源代码

// AccountTextView.java
// AccountTextView is an AbstractAccountView subclass
// that displays an Account balance in a JTextField.
package com.deitel.advjhtp1.mvc.account;

// Java core packages
import java.util.*;
import java.text.NumberFormat;

// Java extension packages
import javax.swing.*;

public class AccountTextView extends AbstractAccountView {  

   // JTextField for displaying Account balance
   private JTextField balanceTextField = new JTextField( 10 );
   
   // NumberFormat for US dollars
   private NumberFormat moneyFormat = 
      NumberFormat.getCurrencyInstance( Locale.US );
      
   // AccountTextView constructor
   public AccountTextView( Account account )
   {
      super( account );
      
      // make balanceTextField readonly
      balanceTextField.setEditable( false );
      
      // lay out components
      add( new JLabel( "Balance: " ) );
      add( balanceTextField );
      
      updateDisplay();
   }
   
   // update display with Account balance
   public void updateDisplay()
   {      
      // set text in balanceTextField to formatted balance
      balanceTextField.setText( moneyFormat.format( 
         getAccount().getBalance() ) );
   }
}

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 * (C) Copyright 2002 by Deitel & Associates, Inc. and         *
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