BankAccount App - Allow Users To Deposit / Withdraw And Transfer Money To Other Accounts Using GUI Interface

This programs is a bank account application that allows users to deposit, withdraw, and transfer money to another accounts using GUI interface. the program works perfect except transferTo part, where if user clicks the transferTo button and choose the beneficiary account and enter the amount it wont transfer to that account.

account class

import java.text.NumberFormat;
import java.util.GregorianCalendar;
import javax.swing.JOptionPane;
public abstract class Account {
String number;
String name;
GregorianCalendar openDate = new GregorianCalendar();

[Code] .....