Returns a key-value mapping associated with the least key strictly greater than the given key, or {@code null} if thereis no such key.
@param key the key
@return an entry with the least key greater than {@code key}, or {@code null} if there is no such key
@throws ClassCastException if the specified key cannot be comparedwith the keys currently in the map
@throws NullPointerException if the specified key is nulland this map does not permit null keys
@throws ClassCastException {@inheritDoc}
@throws NullPointerException if the specified key is nulland this map uses natural ordering, or its comparator does not permit null keys
@since 1.6
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.