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map.keyset in java

Dangerous Dunlin answered on May 21, 2020 Popularity 10/10 Helpfulness 1/10

answer map.keyset in java

related map.keySet

map.keyset in java

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Method returns a set having the keys of the hash map.

Popularity 10/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on May 21 2020

Dangerous Dunlin

0 Answers Avg Quality 2/10

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map.keySet

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/**Here, the loop iterates over keySet. 
For each key, we get the corresponding value using Map.get.
While this is an obvious way to use all of the entries in the map,
it requires two operations for each entry — one to get the next key and one 
to look up the value with get.
If we need just the keys in a map,
keySet is a good option. However, there's a faster way to 
get both the keys and values. **/
for (String key : bookMap.keySet()) {
    System.out.println("key: " + key + " value: " + bookMap.get(key));
}

Popularity 9/10 Helpfulness 2/10 Language java

Source: www.baeldung.com

Tags: java

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Contributed on Mar 23 2022

Zenon Codes

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map.keyset in java

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