Error in connecting oracle 11G in localhost using JDBC

Question

import java.sql.*;

public class one {

    public static void main(String[] args)

    {
            Connection conn=null;
             


        

Answer 1

The connection string is malformed. It should be "jdbc:oracle:thin://@localhost:1521/ecom" Notice the transposition of // and @.

Answer 2

1) Please be sure database host name, port number, or database instance name are correct. 2) Be sure the TNSListener has been started ( run lsnrctl start)