Java - Add Email Subject and Body

Probably you want to build your body with a StringBuilder and then pass that to the sendMail() method.

Something like this ...

import java.io.IOException; 

    import java.nio.file.FileStore; 

    import java.nio.file.FileSystems; 

    import java.util.*; 

    import javax.mail.*; 

    import javax.mail.internet.*; 

    import javax.activation.*; 

    public class LinuxMounts { 

        public static void main(String[] args) throws IOException { 

            String mailFrom = "[email protected]"; 

            String mailTo = "<[email protected]>"; 

            String mailSubject = "Testing from Java"; 

            String mailBody = "You passed!"; 

            String mailHost = "localhost"; 

            StringBuilder sbMailBody = new StringBuilder();

            sbMailBody.append(printHeading()); 

            sbMailBody.append(mailBody);

            for (FileStore store : FileSystems.getDefault().getFileStores()) { 

                String strPath = store.toString(); 

                if (strPath.matches("^/(u01|backups).*$")){ 

                    long total = store.getTotalSpace() / 1024 / 1024 / 1024; 

                    long used = (store.getTotalSpace() - store.getUnallocatedSpace()) / 1024 / 1024 / 1024; 

                    long avail = store.getUsableSpace() / 1024 / 1024 / 1024; 

                    float percentage = total == 0 ? 0 (used * 100) / total);  //prevent divide by zero exp

                    sbMailBody.append(String.format("%-50s %20d %20d %20d %20.2f %n", store, total, used, avail, percentage)); 

                } 

            } 

            System.out.println(sbMailBody.toString());

            sendEmail(mailFrom, mailTo, mailSubject, sbMailBody.toString(), mailHost); 

        } 

        static String printHeading(){ 

            String heading1 = "Filesystem"; 

            String heading2 = "Total Size (MB)"; 

            String heading3 = "Used Space (MB)"; 

            String heading4 = "Available Space (MB)"; 

            String heading5 = "Percentage Used (%)"; 

            String strHeading = String.format("%-50s %20s %20s %20s %20s %n", heading1, heading2, heading3, heading4, heading5); 

            return strHeading;

        } 

        public static void sendEmail(String fromEmail, String toEmail, String subject, String body,String mailHost){ 

            Properties properties = System.getProperties(); 

            //Setup mail server 

            properties.setProperty("mail.smtp.host", mailHost); 

            Session session = Session.getDefaultInstance(properties); 

            try { 

                MimeMessage message = new MimeMessage(session); 

                message.setFrom(new InternetAddress(fromEmail)); 

                message.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmail)); 

                message.setSubject(subject); 

                message.setText(body); 

                // Send message 

                Transport.send(message); 

                System.out.println("Sent message successfully...."); 

            } catch (MessagingException mex) { 

                    mex.printStackTrace(); 

              } 

        }  

    }