1.Check Parameters

參數檢查

–Don’t trust the inputs

–Fail quickly and cleanly

–Document exceptions that will be thrown?including unchecked exceptions

-For unexported (non-public) methods, assert the validity of parameters

2.Exceptions are not for control flow

*異常僅用于例外情況，盡量使用標準異常庫

-Exceptions should never be used for ordinary control flow

-Well-designed APIs do not force clients to program to exceptions

3.Cater for client assumptions

-Return empty arrays or collections, not nulls

4.Defensive copying

對于每個可變參數的賦值和構造進行防御性拷貝

-Make defensive copies when needed

*Perform defensive copying before checking validity

*For get methods, return defensive copies of mutable internal fields

5.Immutability?

轉載于:https://www.cnblogs.com/eli-ayase/p/5281971.html

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