java connect to mysql

1import java.sql.*;  
2class MySqlConn{  
3    public static void main(String args[]){  
4        try{  
5            Class.forName("com.mysql.cj.jdbc.Driver");  
6            Connection conn = DriverManager.getConnection("jdbc:mysql://
7            localhost:3306/databasename","username","password");  
8            Statement stmt = conn.createStatement();  
9            ResultSet rs = stmt.executeQuery("select * from emp");    
10            con.close();  
11        }catch(Exception ex){
12            System.out.println(ex);
13        }  
14    }
15}