Difference between ClassNotFoundException and NoClassDefFoundError

[@rajeshthokala4163]

i dont know really ekalavya story was really there r not in history..,but u have thousands of ekalavyas here sir..,no of my frnds learning by sitting in hostels..,verry glad to share here@@ this is good programming practiece sir

[@choudharyrajesh123]

I think we can get the NoClassDefFoundError even in case of dynamic loading. Suppose you try to load class A dynamically which contains an inner class B and at run time Class A .class is present but class B .class is not there then you will get NoClassDefFoundError error. Correct me if i am wrong

[@madhukumartechfortit2538]

sir am a big fan of u... my ambition is i want to be a good java trainer like u.. please bless me

[@lokeshrao8161]

Good explanation 🙏

[@NayanGohil]

Hi, I understood the difference between these two. But my concern is, if both the things are same (i.e. could not find class at runtime), why the need of having two different exceptions? I mean what happens inside the JVM?

[@love70200]

because , for a hard coded class names, java doesnt want developers to handle it by any hook or crook and wants to treat it like an error from where situation cannot be handled. for a dynamic class name, since at the very begining, classnames were provided dynamically, allows for a situation where classnames are user fed, if users makes a mistake, java gives u an option to take an alternate course of action. hence the need for two

[@amodmaroly8330]

i have a doubt @durga sir so when database driver is loaded using Class.forName("oracle.jdbc.driver.OracleDriver"); at run time how can we say that prepared statement is precompiled

[@digambarrathod8775]

Nice to learn with Durga Sir java but please provide notes for these java course

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[@Indian1947-o1z]

Thank you Sir

[@madhusudhankamalapuram7608]

Thanks sir..........

[@VINAYKUMAR-nj9pl]

The name itself says it is an error( NoClassDefFoundError ) . But you are saying it as an Runtime exception! ?

[@DurgaSoftwareSolutions]

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[@imranmoosani]

but when we do Test t = new Test() - - if class file is not there, wont be get compile time error ? saying class not available ??

[@asifkamranmalick5313]

he meant .class file

[@ap6471]

Sir please also explain using codes too

[@jonesalapat6199]

ClassNotFoundException cannot be called as runtime exception since it does not extend runtime exception

[@DurgaSoftwareSolutions]

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[@AkashJaiswalAkash7771]

+Jones J alapat ClassNotFound is a Checked Exception.. But Suppose During Runtime the Class Specified by the use is Not Present at first Place..So At Runtime we get the ClassNotFoundException ..

[@santoshkumarkar39]

Type casting.......... I remember...

[@sameerpatel3476]

Same happened with me today :'( if I would have got this vdo before I might be selected in IBM today.

[@jitsinghkhalsa1221]

Okay from now onwards, if you face same question, kindly mention below point to interviewer.He/She would be very happy. ClassNotFoundException:- 1)It occurs when an application tries to load a class at run time which is not updated in the classpath. 2)It is thrown by the application itself. It is thrown by the methods like Class.forName(), loadClass() and findSystemClass(). 3)It is an exception. It is of type java.lang.Exception. NoClassDefFoundException 1)It occurs when java runtime system doesn’t find a class definition, which is present at compile time, but missing at run time. 2)It is thrown by the Java Runtime System. 3)It is an error. It is of type java.lang.Error