java 邮件消息发送错误

Question

I am using JavamailAPI, I downloaded and installed the javamail-1.4.4 and jaf-1.1.1. Added the mail.jar and activation.jar to the CLASSPATH. Ii am able to compile the msgsend class, when i trying to run the msgsend class i am getting the following exception.

Exception in thread "main" java.lang.NoClassDefFoundError: msgsend/java
Caused by: java.lang.ClassNotFoundException: msgsend.java
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: msgsend.java.  Program will exit.

Please any can help me in solving this issue.

Thanks in advance..

Answer 1

Looks like you are trying to launch your program by

java msgsend.java

but the java expects a class name, not a file name.

java msgsend

Also, class names in Java should be upper-case.

Answer 2

First, you will need to compile your msgsend.java using javac and then run it as follows:

java msgsend

See that I removed the .java extension as java will look for msgend.class .