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This rule appears in the C++ Secure Coding Standard as OBJ00-CPP. Declare data members private.
References
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\[[JLS 06|AA. Java References#JLS 06]\] Section 6.6, Access Control \[[SCG 07|AA. Java References#SCG 07]\] Guideline 3-2 Define wrapper methods around modifiable internal state \[[Long 05|AA. Java References#Long 05]\] Section 2.2, Public Fields \[[Bloch 08|AA. Java References#Bloch 08]\] Items 13: Minimize the accessibility of classes and members; 14: In public classes, use accessor methods, not public fields |
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