{{theTime}}

Search This Blog

Total Pageviews

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(...));

No comments:

java.lang.IllegalArgumentException: Unsupported class file major version 60

- Check the stack trace and version of Java. - Update the correct Java Version to resolve the Exception.