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Although recompiling Bar.java solves this problem, a better solution is available.
Compliant Solution
Wiki Markup final}} Fields and Constants," |http://java.sun.com/docs/books/jls/third_edition/html/binaryComp.html#13.4.9] of the _Java Language Specification_ \ [[JLS 2005|AA. References#JLS 05]\],
Other than for true mathematical constants, we recommend that source code make very sparing use of class variables that are declared
staticandfinal. If the read-only nature offinalis required, a better choice is to declare aprivate staticvariable and a suitable accessor method to get its value.
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In this solution, the private version value cannot be copied into the Bar class when it is compiled, consequently preventing the bug. Note that most just-in-time (JIT) code generators can inline the getVersion() method at runtime, so little or no performance penalty is incurred.
Exceptions
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*DCL04-EX1*: According to [§9.3, "Field (Constant) Declarations," |http://java.sun.com/docs/books/jls/third_edition/html/interfaces.html#9.3] of the _Java Language Specification_ \[ [JLS 2005|AA. References#JLS 05]\], "Every field declaration in the body of an interface is implicitly {{public}}, {{static}}, and {{final}}. It is permitted to redundantly specify any or all of these modifiers for such fields."
DCL04-EX2: Constants declared using the enum type are permitted to violate this guideline.
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C Secure Coding Standard: DCL00-C. Const-qualify immutable objects
Bibliography
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[[JLS 2005AA. References#JLS 05]] | http://java.sun.com/docs/books/jls/third_edition/html/binaryComp.html#13.4.9] | ]]></ac:plain-text-body></ac:structured-macro> | |
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