It's a Java API that allows you to send SMS messages.
Yes. The easiest way is to use SmsSender.sendWapSiPushMsg()
or .SmsSender.sendWapSiPushMsg()
Yes. The easiest way is to use SmsSender.sendMmsNotification()
.
Install the javacomm api from sun.
WMA is targeted towards J2ME.
smsj is targeted to create different types of messages. jsr212 is more focused on the sending part.