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22This chapter includes 24 problems meant to draw several rules for working with ** Optional** . The problems and solutions presented in this section
3- are based on the Brian Goetz (Java’s language architect) definition: * Optional is intended to provide a limited mechanism for library method
4- return types where there needed to be a clear way to represent “no result," and using null for such was overwhelmingly likely to cause errors.*
3+ are based on the Brian Goetz (Java’s language architect) definition: * Optional is intended to provide a limited mechanism for library method
4+ return types where there needed to be a clear way to represent “no result," and using null for such was overwhelmingly likely to cause errors.*
55 But, where there are rules there are exceptions as well. Therefore, do not conclude that the rules (or practices) presented here should be
6- followed (or avoided) at all costs. Like always, it’s an it depends problem that requires to evaluate the situation and weight pros and cons.
6+ followed (or avoided) at all costs. Like always, it’s an it depends problem that requires to evaluate the situation and weight pros and cons.
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