Java. Lang. classcastexception: Java. Lang. Long

Reuse previous pagesProgramSettotalcount (SQL) failed. java. Lang. classcastexception: Java. Lang. Long exception

 

Solution:

Set

(Integer) result. Get (0). intvalue ();

Changed:

(Long) result. Get (0). intvalue ();

 

Apparently, the return type of the SQL statistics statement has changed. You can view the return type using the following methods for similar issues:

 

System. Out. println ("return type:" + result. Get (0). getclass (). getname ());

 

 

In addition,

Because the catch processing in settotalcount (SQL) is only simple return 0, I have been querying for a long time and I don't know where the problem is. We recommend that you output an exception prompt on the console when capturing an exception. Simple printstacktrace () is good.