Java TreeMap higherEntry(K key) Method Example

The floorEntry(K key) method  of java.util.TreeMap class returns a key-value mapping associated with the greatest key less than or equal to the given key, or null if there is no such key, where as higherEntry(K key) method returns a key-value mapping associated with the least key strictly greater than the given key, or null if there is no such key.
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