Hello everyone. One question regarding maps. I have a map

Question

Hello everyone. One question regarding maps. I have a map

with 5 objects. My task was to convert the map to stream. I got that part. Now I have to search the map for all the usernames which contain the letter "h" or "fu". I have to use either regex or string.contains() method for that. Does someone have a link with a good explanation and an example of how regex works? Or even the string.contains() method in combination with maps/hashmaps/streams?

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30.10.2021

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Pedro Aguiar · Accepted Answer

Pedro Aguiar

Do you want to check whether a string has "h" and/or "lu" in it?

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30.10.2021

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Hello everyone. One question regarding maps. I have a map

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