Computers and Technology, 15.05.2021 03:20 aylineorozco836
If the user enters any operator symbol other than , -, *, or /, then an UnknownOperatorException is thrown and the user is allowed to reenter that line of input. Define the class UnknownOperatorException as a subclass of the Exception class. Your program should also handle NumberFormatException if the user enters non-numeric data for the operand.
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If the user enters any operator symbol other than , -, *, or /, then an UnknownOperatorException is...
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