Not able to send email in java

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Java

When sending mail in java using gmail server error is occurring that "could not connect to smtp host". Below is the code and error:
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package p1;

import java.util.Properties;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/**
 *
 * @author abc
 */

public class SendMail
{
   public static boolean sender(String from,String password,String message,String to[])
   {
       String host ="smtp.gmail.com";
       Properties pro = System.getProperties();
       pro.put("mail.smtp.starttls.enable","true");
       pro.put("mail.smtp.host",host);
       pro.put("mail.smtp.user",from);
       pro.put("mail.smtp.password",password);
       pro.put("mail.smtp.port",465);
       pro.put("mail.smtp.auth","true");
       
       Session session = Session.getDefaultInstance(pro,null);
       MimeMessage mimemessage =new MimeMessage(session);
       
       try
       {
           mimemessage.setFrom(new InternetAddress(from));
           //noe get the address of ricipents 
           InternetAddress[] toAddress = new InternetAddress[to.length];
           
           for (int i = 0; i <to.length; i++)
           {
               
               toAddress[i] = new InternetAddress(to[i]);
           }
               //now add the all toaddress elements
               
               for (int j = 0; j <toAddress.length; j++) 
               {
                   
                   mimemessage.addRecipient(RecipientType.TO, toAddress[j]);
               } //add subject
                   mimemessage.setSubject("My name is jay");
                   // set message to mimee message
                   mimemessage.setText(message);
                  
                   Transport transport = session.getTransport("smtp");
                   
                   transport.connect(host,from,password);
                   transport.sendMessage(mimemessage, mimemessage.getAllRecipients());
                       System.out.println("8888888888888");
                   transport.close();
                   
                   
                       
                   return true;
               
       }
            catch(Exception e)// genrate MessagingException
           {
           e.printStackTrace();
           }
       
       return false;
   }
       
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package p1;

/**
 *
 * @author abc
 */
public class EmailDemo {
    public static void main(String[] args) {
        String[] to={"jayspatel27@gmail.com","sanjayhpatel3@gmail.com"};
       if( SendMail.sender("jayspatel27@gmail.com", "9426841090", "message to ecipents ", to))
       {
            System.out.println("Success");}
       else
       {
           System.out.println("enter proper detail");
       }
        
        
    }
    
}

------------------------------------------
error:-
---------------------------------------------

run:
javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
enter proper detail
  nested exception is:
	java.net.ConnectException: Connection timed out: connect
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1972)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
	at javax.mail.Service.connect(Service.java:295)
	at javax.mail.Service.connect(Service.java:176)
	at p1.SendMail.sender(SendMail.java:61)
	at p1.EmailDemo.main(EmailDemo.java:14)
Caused by: java.net.ConnectException: Connection timed out: connect
	at java.net.DualStackPlainSocketImpl.connect0(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:579)
	at java.net.Socket.connect(Socket.java:528)
	at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:319)
	at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:233)
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1938)
	... 5 more
BUILD SUCCESSFUL (total time: 22 seconds)