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How to synchronize TreeMap?

TreeMap implementation is not synchronized.   If multiple threads access TreeMap and atleast one thread updates the TreeMap, it must be synchronized externally.  If no external synchronization, use 

 SortedMap m = Collections.synchronizedSortedMap(new TreeMap(...));

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Windows 8.3 file naming setting is disabled for the product

To enable Windows 8.3 file naming setting use fsutil command Example:  c:\> fsutil 8dot3name set C: 0