Stream<String> valuestream = map.values().stream();

回答: 这段代码是通过map的values()方法获取到一个Stream<String>对象。\[3\]在这个代码片段中，map是一个Map对象，values()方法返回一个Collection视图，然后通过stream()方法将其转换为一个Stream对象。这个Stream对象包含了map中所有的value值。
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