Java. Lang. noclassdeffounderror: COM/Sun/mail/util/lineinputstream

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• Cause of exception:
• Solution:

 

Exception in thread "Main" Java. Lang. noclassdeffounderror: COM/Sun/mail/util/lineinputstream

Cause of exception:

The Java EE version is different from that of javamail.
For example, if javamail 1.3 or lower is on javaee5, the above error will occur, but it will work normally in javaee1.4. (However, I have tried javaee5 + javamail1.4.) Because javaee5 contains javamail classes but is not comprehensive, the javamail package conflicts.

 

 

Solution:

Download the latest mail. jar from sun and remove the Java EE package that comes with myeclipse.

But you may also need to use the servlet related classes in the EE package, you can copy the servlet-api.jar from the Lib folder of Tomcat to the project, use it to replace the EE package, everything is OK !.