import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.NoSuchElementException;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.DataFormatException;

/**
*
* @author
*/
public class ExceptionalBankTester {

public static void main(String[] args) {
   System.out.println(testRemoveCoinEmptyBank());
   System.out.println(testLoadCoinsNullReference());
   System.out.println(testLoadCoinsFileNotFound());
   System.out.println(testLoadCoinsFileFound());
   System.out.println(testGoodExceptionalBankConstructor());
   System.out.println(testExceptionalBankConstructor());
   System.out.println(testAddCoinsValidFormat());
   System.out.println(testAddCoinsNoSuchElement());
   System.out.println(testAddCoinsInvalidDataFormat());
   System.out.println(testAddCoinsIllegalArgument());
   System.out.println(testAddCoin());
   System.out.println(testSaveBankSummary());
}

public ExceptionalBankTester() {

}

/**
* * This method checks whether the ExceptionalBank constructor throws an
* IllegalArgumentException with appropriate error message, when it is
* passed a zero or a negative capacity. This test must fail if another kind
* of exception is thrown for such test scenario. ** @return true when this
* test verifies a correct functionality, and false otherwise
*/
public static boolean testExceptionalBankConstructor() {
   try {
// create an exceptional bank with a negative capacity
         ExceptionalBank bank = new ExceptionalBank(-10);
         System.out.println(
               "Problem detected. The constructor call of the ExceptionalBank class did not " + "throw an IllegalArgumentException when it is passed a negative capacity.");
         return false; // return false if no exception has been thrown
   } catch (IllegalArgumentException e1) {
// check that the caught IllegalArgumentException includes
// an appropriate error message
         if (e1.getMessage() == null // your test method should not throw
               // a NullPointerException,but must return false if e1.getMessage is null
               || !e1.getMessage().toLowerCase().contains("must be a non-zero positive integer")) {
            System.out.println(
                     "Problem detected. The IllegalArgumentException thrown by the constructor " + "call of the ExceptionalBank class when it is passed a negative capacity " + "does not contain an appropriate error message.");
            return false;

This lab requires writing 4 methods and the main program that calls...