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Alex Rivera
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I am reading "Effective Java" by Joshua Bloch, item 39 make defensive copy, and I have some questions. I always use the following construct: MyObject.getSomeRef().setSomething(somevalue); which is short for: SomeRef s = MyClass.getSomeRef(); s.setSomething(); MyObject.setSomeRef(s); It always works, but I guess if my getSomeRef() was returning a copy then my shortcut would not work, how can I know if the implementation of MyObject is hidden if it is safe to use a shortcut or not?
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