“NoClassDefFoundError: Could not initialize class” error

NoClassDefFound error is a nebulous error and is often hiding a more serious issue. It is not the same as ClassNotFoundException (which is thrown when the class is just plain not there). NoClassDefFound may indicate the class is not there, as the javadocs indicate, but it is typically thrown when, after the classloader has loaded the bytes for the … Read more

Can I catch multiple Java exceptions in the same catch clause?

This has been possible since Java 7. The syntax for a multi-catch block is: Remember, though, that if all the exceptions belong to the same class hierarchy, you can simply catch that base exception type. Also note that you cannot catch both ExceptionA and ExceptionB in the same block if ExceptionB is inherited, either directly or indirectly, from ExceptionA. The compiler will complain: … Read more

EOFException – how to handle?

While reading from the file, your are not terminating your loop. So its read all the values and correctly throws EOFException on the next iteration of the read at line below: If you read the documentation, it says: Throws: EOFException – if this input stream reaches the end before reading eight bytes. IOException – the stream has … Read more

Why is this code throwing an InvalidOperationException?

As you can see here, the First method throws an InvalidOperationException when the sequence on which it is called is empty. Since no element of the result of the split equals Hello5, the result is an empty list. Using First on that list will throw the exception. Consider using FirstOrDefault, instead (documented here), which, instead of throwing an exception when the sequence is empty, returns … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)