Copies all of the mappings from the specified map to this map.
These mappings replace any mappings that this map had for any
of the keys currently in the specified map.
@param map mappings to be stored in this map
@throws ClassCastException if the class of a key or value in
the specified map prevents it from being stored in this map
@throws NullPointerException if the specified map is null or
the specified map contains a null key and this map does not
permit null keys
Copies all of the mappings from the specified map to this map. These mappings replace any mappings that this map had for any of the keys currently in the specified map.
@param map mappings to be stored in this map @throws ClassCastException if the class of a key or value in the specified map prevents it from being stored in this map @throws NullPointerException if the specified map is null or the specified map contains a null key and this map does not permit null keys