[Java] Classes that require exception handling

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Checked exceptions mean that there is no file that should be opened, etc. Exception handling is essential because it is a situation that can occur depending on the situation regardless of the program failure.


A subclass of the Excption class. Occurs when the class cannot be loaded. Exception handling is mandatory.


A subclass of the Exception class. This occurs when using the I/O function. Exception handling is mandatory.


A subclass of the Exception class. It occurs when the target file does not exist when reading or writing the file. Exception handling is mandatory.