Introducing Constraints

But what happens if I try to set age to a negative number or a very large number? Maybe I should introduce some constraints on age.

I’ll start by defining some constants for Person, test-first of course.

images/testconstants.png

I get the red squiggly line under MINIMUM_AGE and MAXIMUM_AGE because they haven’t been defined yet. I’ll let Eclipse autogenerate them in the Person class and then I’ll clean them up so they read

​ ​public​ ​static​ ​final​ ​int​ MINIMUM_AGE = 1;
​ ​public​ ​static​ ​final​ ​int​ MAXIMUM_AGE = 200;

This defines the symbols I’ll use to set the lowest and highest ages I’ll accept to 1 and 200. I’ve never heard of anyone living ...

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