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Exception Handling
In Java is one of the effective means to handle the runtime errors so that the regular flow of the application can be preserved. Java Exception Handling is a mechanism to handle runtime errors such as ClassNotFoundException, IOException, SQLException, RemoteException, etc.

Major reasons why an exception Occurs
Invalid user input
Device failure
Loss of network connection
Physical limitations (out of disk memory)
Code errors
Opening an unavailable file
Errors represent irrecoverable conditions such as Java virtual machine (JVM) running out of memory, memory leaks, stack overflow errors, library incompatibility, infinite recursion, etc. Errors are usually beyond the control of the programmer, and we should not try to handle errors.

For more about Exception Handling in Java visit
https://hkrtrainings.com/excep....tion-handling-in-jav