accountwidget.java

Deployment of Server 1.install Tomcat(superior than j2sdk1.4.2 and Tomcat 5.0),and setup the env

import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;

/** 
 * This class configures a GUI interface to the Account class.
 * It is used by both the applet and the standalone application.
 * @author   Ian A. Mason.
 * @version  1.1
 * @since    March 2005
 */

class AccountWidget {

  public static void configure(final Container cont){
      final String answer = "Account balance = $";
      final DecimalFormat formatter =  new DecimalFormat("#.##");
      cont.setLayout(new FlowLayout());
      Label alabel = new Label("Amount in Account (an int):", Label.CENTER);
      alabel.setFont(new Font("SansSerif", Font.PLAIN, 15));
      cont.add(alabel);   
      final TextField afield  = new TextField("0",12);
      afield.setFont(new Font("SansSerif", Font.PLAIN, 15));
      cont.add(afield);   
      Label rlabel = new Label("Interest Rate for Account (an float):", Label.CENTER);
      rlabel.setFont(new Font("SansSerif", Font.PLAIN, 15));
      cont.add(rlabel);   
      final TextField rfield  = new TextField("0.00", 4);
      rfield.setFont(new Font("SansSerif", Font.PLAIN, 15));
      cont.add(rfield);   
      Label tlabel = new Label("Length of Deposit (an int):", Label.CENTER);
      tlabel.setFont(new Font("SansSerif", Font.PLAIN, 15));
      cont.add(tlabel);   
      final TextField tfield  = new TextField("0", 4);
      tfield.setFont(new Font("SansSerif", Font.PLAIN, 15));
      cont.add(tfield);   
      final Button button = new Button("To Compute the Value of the Account -- Press Me!");
      button.setFont(new Font("SansSerif", Font.PLAIN, 20));
      button.setForeground(Color.blue);
      cont.add(button);
      final Label answerLabel = new Label(answer + 0 , Label.LEFT);
      answerLabel.setFont(new Font("SansSerif", Font.PLAIN, 25));
      cont.add(answerLabel);

      /* 
       * note the use of an anonymous inner class to do the event
       * handling, this explains why the awt widgets used in the body 
       * are declared final. 
      */

      button.addActionListener(new ActionListener(){
	      public void actionPerformed(ActionEvent ae){
		  int   a = 0; 
		  int   t = 0;
		  float r = 0F;
		  try{
		      a = Integer.parseInt(afield.getText());
		      r = Float.parseFloat(rfield.getText());
		      t = Integer.parseInt(tfield.getText());
		  }catch(NumberFormatException e){ }
		  //Using the user (i.e. your version) defined Account class
		  Account account = new Account(a,r);        
		  answerLabel.setText(answer + formatter.format(account.getBalance(t)));
		  cont.validate();
	      }
	  });
  }
}