Use the following file:
FormatTester.java
/**
Tests the use of the Formattable interface.
*/
public class FormatTester
{
public static void main(String[] args)
{
BankAccount account1 = new BankAccount(1000.34367);
BankAccount account2 = new BankAccount(55.83147);
BankAccount account3 = new BankAccount(345);
BankAccount account4 = new BankAccount(99000.10924);
System.out.printf("|%10.2s|%10.2s|%10.2s|%10.2s|%n",
account1, account2, account3, account4);
System.out.println("Expected: | 1000.34| 55.83| 345.00| 99000.10|");
}
}