"if key exists in hashmap java" Code Answer's
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check if map contains key java
if (map.containsKey(key)) {
// Okay, there's a key but the value is null
} else {
// Definitely no such key
}
Source: stackoverflow.com
if key exists in hashmap java
Hash_Map.containsKey(key_element)
Source: www.geeksforgeeks.org
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