PMD规则之Coupling Rules

·  CouplingBetweenObjects: This rule counts unique attributes, local variables and return types within an object. A number higher than specified threshold can indicate a high degree of coupling.

翻译  对象间的耦合：这个规则统计一个对象中单个的属性、本地变量和返回类型的数目。如果统计数目大于指定的上限值表示耦合度太高。

·  ExcessiveImports: A high number of imports can indicate a high degree of coupling within an object. Rule counts the number of unique imports and reports a violation if the count is above the user defined threshold.

翻译  过多的引入：大量的import表明对象有很高的耦合度。本规则统计单一的import数目，如果数目大于用户定义的上限则报告一个违例。

·  LooseCoupling: Avoid using implementation types (i.e., HashSet); use the interface (i.e, Set) instead

翻译  松耦合：避免使用具体实现类型(如：HashSet);用接口(如：Set)代替。