does th开发者_如何学Ce above command produce a deep copy of a LinkedHashMap's elements?
In Java, clone()
is almost always shallow. This is for two reasons:
- Performance
- Not every object defines a working
clone()
method, so deep copying isn't always possible.
LinkedHashMap
derives from HashMap
, which specifies this for the clone() method:
Returns a shallow copy of this HashMap instance: the keys and values themselves are not cloned.
(So no, it's a shallow clone rather than deep. Not that it really matters for the strings.)
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