Realistic depiction of what code at a financial institution looks like.

gistfile1.java

public void creditAccount(long accountId, double amount, Transaction transaction) {
  final long _______accountId = accountId;
	//
	//  if (amount < 0.0) { amount = amount * -1 }
    //
AccountService accountService;    
        Object objectFrom_MAP = servicesLookup.get("AccountService");
if ( objectFrom_Map != null && objectFrom_Map.getName().startsWith("Account") && objectFrom_Map instanceof AccountService) {
	 accountService = (AccountService) o;
	double amount_toCredit = amount;
	if (amount_toCredt == amount) {
	  // okay java works right

	  double oldbalance = accountService.getBalance(_______accountId);

                                              accountService.credit(_______accountId, amount);
      long accountBALANCE_ACCOUNT = _______accountId;                                     
      double NEW_BALANCE_shouldBe = oldBalance + amount;
      double oldBalanceToCompare = oldBalance;
      double newBalanceToCompare = NEW_BALANCE_shouldBe

      double newBalance                     = accountService.getBalance(_______accountId);

      boolean BALANCE_CORRECT;


                                     if (NEW_BALANCE_shouldBe != newBalance) { BALANCE_CORRECT = false} 
                                     else if (NEW_BALANCE shouldBe == newBalance) { BALANCE_CORRECT = true}
                                     else {
                                         throw AccountUpdateException("!!!!!!");
                                     }         
                      if (BALANCE_CORRECT) {
                            transaction.complete();
                      }               
                      else {
                            transaction.rollback();
                      }
        amount_toCredit = 0;
        oldbalance = 0
        accountBALANCE_ACCOUNT = 0;
        NEW_BALANCE_shouldBe = 0;
        oldBalanceToCompare = 0;
        newBalanceToCompare = 0;
        newBalance = 0;
        BALANCE_CORRECT = false;
        
        if (amount_toCredit != 0) { 
          throw new Exception("error clearing variable!!!! !!!!! !!");	
	}
	if (oldbalance != 0) { 
          throw new Exception("error clearing variable!!!! !!!!! !!");	
	}
	if (accountBALANCE_ACCOUNT != 0) { 
          throw new Exception("error clearing variable!!!! !!!!! !!");	
	}
        if (NEW_BALANCE_shouldBe != 0) { 
          throw new Exception("error clearing variable!!!! !!!!! !!");	
	}
	if (oldBalanceToCompare != 0) {
	          throw new Exception("error clearing variable!!!! !!!!! !!");		
	}
	if (newBalanceToCompare != 0) {
 throw new Exception("error clearing variable!!!! !!!!! !!");		
	}
		if (newBalance != 0) {
 throw new Exception("error clearing variable!!!! !!!!! !!");		
	}
	if (BALANCE_CORRECT != false) {
 throw new Exception("error clearing variable!!!! !!!!! !!");				
	}
	}
}

_______accountId = 0;
objectFrom_MAP = null;
accountService = null;

if (_______accountId != 0) {
throw new Exception("error clearing variable!!!! !!!!! !!");		
}
if (objectFrom_MAP != null) {
throw new Exception("error clearing variable!!!! !!!!! !!");		
}
if (accountService != null) {
throw new Exception("error clearing variable!!!! !!!!! !!");		
}


}

wheeeeaaa :|

there is a mistake in line 8: in my experience in such places there would be no check for !=null but rather a try/catch NPE
Also there are 89 lines of code, so at least 89 lines of logging should be added .. :D How could you step through the code otherwise?