Eclipse中的Access restriction错误

在Eclipse中遇到了如下的错误：

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Access restriction: The method XXX from the type [A Class] is not accessible due to restriction on required library [A package].

用如下的方法就可以解决：

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Windows -> Preferences -> Java -> Compiler -> Errors/Warnings -> Deprecated and trstricted API -> Forbidden reference (access rules): -> change to warning