The higherEntry() method of NavigableMap interface in Java is used to return a key-value mapping associated with the least key strictly greater than the given key, or null if there is no such key existed.
Map.Entry< K, V > higherEntry(K key)
Where, K is the type of key maintained by this map and V is the type of values mapped to the keys.
Parameters: This function accepts a single parameter Key which refers to the type of key maintained by this map container.
Return Value: It returns a key-value mapping associated with the least key strictly greater than the given key, or null if there is no such key existed.
Below programs illustrate the higherEntry() method in Java:
Program 1: When the key is integer.
The mapping with least key is : 3=three
Program 2: When the key is string.
The mapping associated with the least key is : six=seven
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