NoClassDefFoundError

[ArashM98]

hi
good evening

tnx for your guidance . when i use this code :
Session session = Session.getInstance(props, new Authenticator() {
@OverRide
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
in my android(java) app i get this error . can you help me with this ?
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/sun/mail/util/MailLogger;