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# ZCW-MicroLabs-ExceptionsAndLogging
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# PhoneNumberFactory
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* **Purpose** - to demonstrate basic exception handling and logging.
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* **Objective** - to implement a `PhoneNumberFactory` class that generates `PhoneNumber` objects.
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```
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# Part 1; Modify `createPhoneNumber`
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* Upon instantiating a new `PhoneNumber` object, it is possible to receive a `InvalidPhoneNumberFormatException` if the `String` passed into the `PhoneNumber` constructor does not fit the format `(###)-###-####`.<br>
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* `InvalidPhoneNumberFormatException` extends `IOException`, which is a `checked exception`.<br>
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# Part 2; Implement `createPhoneNumberSafely`
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* Using the `createPhoneNumber` method from `Part 1`, define the `createPhoneNumberSafely` method such that the input parameters, `areaCode`, `centralOfficeCode`, `phoneLineCode` are concatenated to create a `String` representation of the respective phone number.
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* Use this `String` object to construct a new instance of `PhoneNumber` and return it.
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* If a `InvalidPhoneNumberFormatException` is thrown within this method, catch it and return `null`.
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# Part 3; Implement `createRandomPhoneNumber`
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* Using the `RandomNumberFactory`, generate a random `Area Code`, `Central Office Code`, and `Phone Line Code`. Pass these values as arguments of the `createPhoneNumberSafely` method from `Part 2` and return the resulting `PhoneNumber` object.
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# Part 4; Implement `createRandomPhoneNumberArray`
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* Using the `createRandomPhoneNumber` from `Part 3`, generate an array of `PhoneNumber` objects, whose length reflects the input argument.
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* For example `createRandomPhoneNumber(5)` should return an array of 5 `PhoneNumber` objects.
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# Part 5; Add logging
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* Add logging to the `createPhoneNumber` method from `Part 1`, which logs the message
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* `"Attempting to create a new PhoneNumber object with a value of (###)-###-####`
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Leon
7 年之前