Javax.mail.* Package does not exist - Why?

Question

Im using a class called emailer to send an email from a java application,
I am using netbeans 6.9.1 and I am using J2SE, I downloaded the javamail api and added the jar to the classpath and also put it in the src for netbeans.

Netbeans is throwing up an error saying Package javax.mail does not exist and I dont know why? As I feel I have done everything correct, here is the code

import java.util.*;
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.mail.*;
import javax.mail.internet.*;

/**
* Simple demonstration of using the javax.mail API.
*
* Run from the command line. Please edit the implementation
* to use correct email addresses and host name.
*/
public final class Emailer {

  public static void main( String... aArguments ){
    Emailer emailer = new Emailer();
        try {

            emailer.sendEmail("fromblah@blah.com", "toblah@blah.com", "Testing 1-2-3", "blah blah blah");
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(Emailer.class.getName()).log(Level.SEVERE, null, ex);
        }
   }


  public void sendEmail(String aFromEmailAddr, String aToEmailAddr,
    String aSubject, String aBody) throws ClassNotFoundException
  {
      Class.forName("javax.mail");

    Session session = Session.getDefaultInstance( fMailServerConfig, null );
    MimeMessage message = new MimeMessage( session );
    try {

      message.addRecipient(
        Message.RecipientType.TO, new InternetAddress(aToEmailAddr)
      );
      message.setSubject( aSubject );
      message.setText( aBody );
      Transport.send( message );
    }
    catch (MessagingException ex){
      System.err.println("Cannot send email. " + ex);
    }
  }


  public static void refreshConfig() {
    fMailServerConfig.clear();
    fetchConfig();
  }



  private static Properties fMailServerConfig = new Properties();

  static {
    fetchConfig();
  }


  private static void fetchConfig() {
    InputStream input = null;
    try {

      input = new FileInputStream( "C:\\Temp\\MyMailServer.txt" );
      fMailServerConfig.load( input );
    }
    catch ( IOException ex ){
      System.err.println("Cannot open and load mail server properties file.");
    }
    finally {
      try {
        if ( input != null ) input.close();
      }
      catch ( IOException ex ){
        System.err.println( "Cannot close mail server properties file." );
      }
    }
  }
}

How to solve this?

Answer 1

添加javax.mail.jar和activation.jar以转到项目 - >构建路径 - >配置构建路径 - > Java构建路径 - >库。

Answer 2

You need to right click on the project name in the project tab the go to

Properties-> Libraries -> Press Add Jar/Folder

... Browse and select your jar...and click OK...and

Clean and Build and re-run