Exception error

[Rose88]

Hey all,

I have an excption error!...it shows errors where is catch... I don't know why. please help me!

public class overTheLimitException extends Exception {

	public overTheLimitException(){
			super ("Your Credit Card is over it's limit");
		}
}
public class NotEnoughMoneyException extends Exception {
	public  NotEnoughMoneyException(){
		super("The balance is under 0");
	}

}
public class CreditCard {
	/**
	 * String cardNumber
	 */
	protected String cardNumber;
	/**
	 * double balance
	 */
	protected double balance;
	/**
	 * int limit
	 */
	protected int limit;
	/**
	 * CreditCard constructor
	 * @param cardNumber
	 * @param balance
	 * @param limit
	 */
	public CreditCard(String cardNumber, double balance, int limit) {
		super();
		this.setCardNumber(cardNumber);
		this.setBalance(balance);
		this.setLimit(limit);
	}//end of constructor
	/**
	 * @return the cardNumber
	 */
	public String getCardNumber() {
		return cardNumber;
	}
	/**
	 * @param cardNumber the cardNumber to set
	 */
	public void setCardNumber(String cardNumber) {
		this.cardNumber = cardNumber;
	}
	/**
	 * @return the balance
	 */
	public double getBalance() {
		return balance;
	}
	/**
	 * the method updates CreditCard's Balance
	 * @param balance the balance to set
	 */
	public void setBalance(double bal) {
		this.balance = bal;
	}
	/**
	 * @return the limit
	 */
	public int getLimit() {
		return limit;
	}
	/**
	 * @param limit the limit to set
	 */
	public void setLimit(int limit) {
		this.limit = limit;
	}
	/**
	 * 
	 */
	public void chargeCard(double amount){
		try{
			if(limit<balance){
					if(amount<=balance){
						balance-=amount;
					}
			}
					}catch (NotEnoughMoneyException e){
						System.err.println("Caught NotEnoughMonetException: "+ e.toString());
					}catch(overTheLimitException e){
					System.err.println("Caught overTheLimitException: "+ e.toString());
				
				}
		}//ChargeCard
}//class

[angryboy]

can you post the errors as welll?

[Eranga]

can you post the errors as welll?

@Rose88, I don't think anyone wants to run your code and find the issues and fix it for you. So you have to give more details about your questions next time onwards, such as a code segment on your question and error messages if any. That's what angryboy wants to point here, I guess.

[mtyoung]

no error throws, how can you catch it...

you should check the value of final balance before modify the variable balance...
like

if (balance - amount < 0)
   do something, may be throw error
else if ...
   do something, may be throw error
else
   balance = xxx

[rameshperumal1984]

for ur doubts logon questionpapers.net

[Eranga]

I have an excption error!...it shows errors where is catch... I don't know why. please help me!

I think our thread starter comes with an error .

[mtyoung]

error should be catch block cant possibly catch a error, as no that kind of error throw in the try block

[Eranga]

Oh yes, you are correct. But even that code deals with the wrong exception, comes with an error, right?

[tim]

Hi Rose.

An exception is not an error. The Exception and Error classes are subclasses of the Throwable class. You probably got the following problem when you tried to compile:

/C:/Users/User/Desktop/CreditCard.java:73: exception NotEnoughMoneyException is never thrown in body of
corresponding try statement
}catch (NotEnoughMoneyException e){
^
/C:/Users/User/Desktop/CreditCard.java:75: exception overTheLimitException is never thrown in body of
corresponding try statement
}catch(overTheLimitException e){
^
2 errors

The compiler said that no exceptions are being thrown in your block of code. So you need to throw them according to your solution. So, let's say, the balance is negative when the person is in dept, and the limit is always positive. Then you could do this:

public void chargeCard(double amount){
	try {
		if(balance - amount >= 0 - limit){
			// it's okay to make more dept
			balance-=amount;
		} else {
			// the limit is reached
			throw new overTheLimitException();
		}
	} catch (overTheLimitException e) {
		System.err.println("Caught overTheLimitException: "+ e.toString());
	}
}

This example shows you how to throw an exception and how to recognize when no exceptions are being thrown, and you are trying to catch them.

Good luck Rose.