why I'm getting NotSerializableException exception though I've implemented 'Serializable'

Question

I\'ve implemented Serializable in class \'userInfo\'. Still I\'m getting exception. Here\'s the output console -

java.io.WriteAbortedException: writing aborted;         


        

Answer 1

Without seeing your code, it's hard to know for sure, but the cause of this is almost always that your class has a field that is not serializable (or that contains an object that contains a field, ...). Everything in an object, including everything that the object references and everything that those objects reference, must be serializable to avoid the exception.

Answer 2

why I'm getting NotSerializableException exception though I've implemented 'Serializable'

You haven't.

java.io.NotSerializableException: chatservernazmus.User public class userInfo implements Serializable{ public class User{

The User class must be serializable as well.

Answer 3

Pass -Dsun.io.serialization.extendedDebugInfo=true to the JVM for tracking the exact cause for NotSerializableException.

Eg: Add SET CATALINA_OPTS=%CATALINA_OPTS% -Dsun.io.serialization.extendedDebugInfo=true in the startup.bat