Check Mail program failed

Question

Hi all, I have a litle problem with a function in a check mail program, that is a NoSuchProviderException, the code is:
public void checkMail(){
try{
Properties props = new Properties();
Session session = Session.getDefaultInstance(props, null);
Store store = session.getStore("pop3");
store.connect("myhost", "myusername", "mypassword");
Folder folder = store.getFolder("inbox");
folder.open(Folder.READ_ONLY);
Message message[] = folder.getMessages();
for (int i=0;i<message.length;i++){
System.out.println(i + ": " + message.getFrom()[0] + "\t" + message[i].getSubject());
System.out.println(message[i].getContent());
folder.close(false);
store.close();
}catch(NoSuchProviderException e){
System.out.println("problems : " + e.getMessage());
}catch(MessagingException e){
System.out.println("problems2");
}catch(IOException e){
System.out.println("problems3");
the message is:"No provider for pop3"
, I have tried to put POP3 and others combinations, only one works, it's imap, but fail in the next step, because of the machine does not support the imap protocol. Also I have pop3.jar in classpath, I have no idea what is the problem.
thanks

Answer 1

You must have com.sun.mail.pop3.* package in your classpath and it seems like you don't