我试图从wiki学习The decorator pattern is an alternative to subclassing. Subclassing adds behavior at compile time, and the change affects all instances of the original class; decorating can provide new behavior at run-time for individual objects.
我有这个疑问，如果我创建一个类Original original = new Original（）;那么如何将它子类化为SubClass extends Original会影响类Original的对象的原始引用，它应该保持原样吗？