The same is true of the classes in java.util.
ut il中的类同样重要。
No Collection class within java.util fulfills these requirements, but it's trivial to write one.
ut il中没有collection类能满足这些需求，但是编写一个这样的类很简单。
No Collection class within java.util fulfills these requirements, but it's trivial to write one.
ut il中没有collection类能满足这些需求，但是编写一个这样的类很简单。
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