Question

My IDE is Eclipse Indigo. I get this when I was trying to connect:

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

And here is my code.

public class TPCH
{
    public static void main(String[] args)
    {
        String userName = "tpch";
        String password = "tpch";
        Connection conn = null;
        Properties connectionProps = new Properties();
        connectionProps.put("user", userName);
        connectionProps.put("password", password);

        try
        {
            Class.forName("com.mysql.jdbc.Driver");
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        try {
            conn = DriverManager.getConnection(
                           "jdbc:mysql://localhost:3306/",
                           connectionProps);
        } catch (SQLException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            System.out.println("Error connecting to db");
        }
    }
}

I think JDBC is not imported. I tried to import it by

preference -> java -> build path -> user library -> add jars

But I still got that exception.

Answer 1

That’s not how you add JARs to the classpath in Eclipse.

You have to right-click on your project, select Java Build Path > Libraries and add a JAR file. For MySQL, you’d need the MySQL Connector J.