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HashMap如何根据Key的自然排序输出?Value呢? #2

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@agi-queen

问题:HashMap如何根据Key的自然排序输出?Value呢?
意图:是否能够灵活应用Java的API。如果这道题都答不出来,那面试可想而知。

在平常的面试中,我发现,确实有很大一部分同学答不上来。这是缺乏实践经验和联想能力,只能说sorry了

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