creating a set of first values from a map having pair values-CodePudding

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creating a set of first values from a map having pair values

Time：07-22

I have a map which has pair values

 Map<String, Pair<Request, Request>> myRequest;

I would like to create a set only fetching the first value from the pair. Is there way to use Java streams to do this?

CodePudding user response：

Not sure what the definition of Pair is but something like

myRequest.values()
    .stream()
    .map(it -> it.getFirst())
    .collect(Collectors.toSet())