Where to use Hashtable in real time in Java (Core Java Interview Question

In this session, I have explained about where exactly we have to use Hashtable in real time in Java programs or Java application or Java projects. We use Hashtable to store key value pairs in Java in a thread-safe manner in a multi-threaded environment or application. Hashtable is by default synchronized and thread-safe and there is no need to synchronize manually to stop the interruption of threads in a multi-threaded environment. When compared with HashMap, Hashtable is slow in sleep i.e. low in performance, due it its default thread safety features. But Hashtable is a legacy feature that is still there in the latest versions of Java, for backward compatibility of the applications whose code is written long back using Hashtable. Latest modern alternative for Hashtable is ConcurrentHashMap, which is threadsafe of HashMap. Hashtable is not recommended to be used in a single threaded environment, as it makes it slow and thread safety feature is not required too. HashMap is used to store key values pairs in a single threaded programs for its speed and no thread safety features. I have also practically written the Java program demonstrating how to use Hastable.
Where to use Hashtable in real time in Java (Core Java Interview Question #483)
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[@razatech22]

Why to use Hashtable at all When we have a better alternative i.e. ConcurrentHashMap???

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Watch the video please, don't judge by title