Java by API/javax.mail/Folder

Folder: getMessages()

 
import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.URLName;
public class Main {
  public static void main(String[] args) throws Exception {
    URLName server = new URLName("protocol://username:password@host/foldername");
    Session session = Session.getDefaultInstance(new Properties(), null);
    Folder folder = session.getFolder(server);
    if (folder == null) {
      System.out.println("Folder " + server.getFile() + " not found.");
      System.exit(1);
    }
    folder.open(Folder.READ_ONLY);
    // Get the messages from the server
    Message[] messages = folder.getMessages();
    for (int i = 0; i < messages.length; i++) {
      System.out.println("------------ Message " + (i + 1) + " ------------");
      messages[i].writeTo(System.out);
    }
    folder.close(false);
  }
}

Folder.READ_ONLY

 
import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.URLName;
public class Main {
  public static void main(String[] args) throws Exception {
    URLName server = new URLName("protocol://username:password@host/foldername");
    Session session = Session.getDefaultInstance(new Properties(), null);
    Folder folder = session.getFolder(server);
    if (folder == null) {
      System.out.println("Folder " + server.getFile() + " not found.");
      System.exit(1);
    }
    folder.open(Folder.READ_ONLY);
    // Get the messages from the server
    Message[] messages = folder.getMessages();
    for (int i = 0; i < messages.length; i++) {
      System.out.println("------------ Message " + (i + 1) + " ------------");
      messages[i].writeTo(System.out);
    }
    folder.close(false);
  }
}