Can not be resolved session, folder ,store, message[]

Question

i dont have a clue on what i am missing here. Any nice explanation on the why would be great
Session cannot be resolved
Session cannot be resolved or is not a type
Store cannot be resolved or is not a type
Folder cannot be resolved
folder cannot be resolved or is not a type
Message[] cannot be resolved or is not a type
import javax.mail.*;
import javax.mail.internet.*;
public class fetch_mail {
     public static void main (String args[])
      throws Exception {
     Properties props = new Properties();
     Session session = Session.getDefaultInstance(props, null);
     Store store = session.getStore("pop3");
    store.connect("smtp.host.com", "user", "pwd");
    Folder inbox = store.getFolder("INBOX");
    inbox.open(Folder.READ_ONLY);
    try {
    Message message[] = inbox.getMessages();
    for (int i=0, n=message.length; i<n; i++) {
    String subject = message.getSubject().toString();
if (subject.startsWith("[test]")) {
System.out.println("\r" + i + ": "
+ message[i].getFrom()[0]
+ "\t" + message[i].getSubject());
String content =
message[i].getContent().toString();
if (content.length() > 200) {
content = content.substring(0, 200);
System.out.print(content);
catch (IOException e) {
System.err.println("Caught IOException");
// Close connection
inbox.close(false);
store.close();
System.exit(0);

Answer 1

I got it figured out..
Altho i did inlude the jar files into the Eclipse, i actually need to put them in the jdk jre lib ext folder to get it all to work right.
mail.jar and activation.jar