ICS2606: Computer Programming II - Exceptions and Error Handling

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What is an Exception in programming?

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An Exception is an object representation of an abnormal condition that arises in a code sequence either at compile time or at runtime.

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What does the Exception object handle?

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The Exception object handles unexpected situations like network failure, misspelled or missing filename, and printers that suddenly go offline.

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What is the Exception class a subclass of?

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The Exception class is a subclass of the Throwable class.

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What are checked exceptions?

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Checked exceptions are recognized by the compiler and consist of all classes that directly inherit from Exception, except for RuntimeException.

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Give examples of checked exceptions.

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Examples include IOException, SQLException, and ClassNotFoundException.

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What are unchecked exceptions?

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Unchecked exceptions are RuntimeExceptions that are not recognized by the compiler.

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What is a NullPointerException?

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A NullPointerException occurs when a program attempts to process a null valued object.

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What is an ArrayIndexOutOfBoundsException?

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An ArrayIndexOutOfBoundsException occurs when an array is accessed with an illegal index.

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What is a NumberFormatException?

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A NumberFormatException commonly occurs in parsing when assigning a different type of variable.

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What is an ArithmeticException?

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An ArithmeticException occurs due to arithmetic errors such as division by zero.