Threadsafe vs Synchronized

Question

I\'m new to java. I\'m little bit confused between Threadsafe and synchronized. Thread safe means that a method or class instance can be used by multiple threads at the same tim

Answer 1

In practice, performance wise, Thread safe, Synchronised, non-thread safe and non-synchronised classes are ordered as:

Hashtable(slower)  <  Collections.SynchronizedMap  <  HashMap(fastest)