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What is the difference between Java exception handling and using assert conditions?
It's known that Assert is of two types. But when should we use assert keyword?
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Exceptions versus assertions Use assert statements to test for conditions during development that should never be true if all your code is correct. There's no point in handling such an error by using an exception, because the error indicates that something in the code has to be fixed.
Errors are not Exceptions. Specifically, AssertionError is not a subclass of RuntimeException, so it is not an unchecked exception.
There are three types of exception—the checked exception, the error and the runtime exception.
The error indicates trouble that primarily occurs due to the scarcity of system resources. The exceptions are the issues that can appear at runtime and compile time. 2. It is not possible to recover from an error.
Use assertions for internal logic checks within your code, and normal exceptions for error conditions outside your immediate code's control.
Don't forget that assertions can be turned on and off - if you care about things like argument validation, that should be explicit using exceptions. (You could, however, choose to perform argument validation on private methods using assertions, on the grounds that a violation at that point is due to an internal bug rather than an external error.)
Alternatively it's entire reasonable (IMO) to use exceptions for everything. I personally don't use assertions much at all, but it's a matter of personal preference to some extent. (There can certainly be objective arguments for and against assertions, but it's not sufficiently clear cut to remove preference altogether.)
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