run:
com.microsoft.sqlserver.jdbc.SQLServerException: Le pilote n'a pas pu établir de connexion sécurisée au serveur SQL Server à l'aide du chiffrement SSL (Secure Sockets Layer). Erreur : « Le serveur SQL Server n'a retourné aucune réponse. La connexion a été fermée. ClientConnectionId:b41b6f9f-9c96-431a-ae4b-9066fef73be1 ».
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:2826)
    at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1829)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:2391)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:2042)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1889)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:1120)
    at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:700)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:270)
    at connectbd.ConnectBD.main(ConnectBD.java:41)
Caused by: java.io.IOException: Le serveur SQL Server n'a retourné aucune réponse. La connexion a été fermée. ClientConnectionId:b41b6f9f-9c96-431a-ae4b-9066fef73be1
    at com.microsoft.sqlserver.jdbc.TDSChannel$SSLHandshakeInputStream.ensureSSLPayload(IOBuffer.java:786)
    at com.microsoft.sqlserver.jdbc.TDSChannel$SSLHandshakeInputStream.readInternal(IOBuffer.java:836)
    at com.microsoft.sqlserver.jdbc.TDSChannel$SSLHandshakeInputStream.read(IOBuffer.java:829)
    at com.microsoft.sqlserver.jdbc.TDSChannel$ProxyInputStream.readInternal(IOBuffer.java:999)
    at com.microsoft.sqlserver.jdbc.TDSChannel$ProxyInputStream.read(IOBuffer.java:989)
    at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
    at sun.security.ssl.InputRecord.read(InputRecord.java:503)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
    at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1756)
    ... 8 more
BUILD SUCCESSFUL (total time: 3 seconds)

package connectbd;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.PreparedStatement;

/**
 *
 * @author blaid
 */
public class ConnectBD {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        String Server="SQLSERVER";
        int port = 1433;
        String user = "SIBD_admin_gr15";
        String password = "aPassword123";
        String database = "LP_SIBD_GR15";
        String Instance = "SQLE";
        String jdbcurl;
        Connection con = null;
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        jdbcurl = "jdbc:sqlserver://" + Server + ";instanceName="+Instance+";user=" + user + ";password=" + password + "; databasename=" + database + "";

        try {
            con=DriverManager.getConnection(jdbcurl);
            System.out.println("Connection success");
        } catch(SQLException e) {
                e.printStackTrace();
        }

    }

}