Koneksi dari Java ke MySQL via JDBC

package cobajavaswing;

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
import java.sql.Connection;
import java.sql.SQLException;

public class Koneksi {
    private static Connection connection;

    public static Connection getConnection(){
        //pengecekan koneksi database
        if (connection==null){
            try{
              String username = "rpl";
              String password = "Cm9150oZzemHHojq";
              String url = "jdbc:mysql://localhost:3306/rpl_perpustakaan";

              MysqlDataSource source = new MysqlDataSource();
              source.setUser(username);
              source.setPassword(password);
              source.setURL(url);

              connection = source.getConnection();
            } catch (SQLException ex){
              System.out.println("Error koneksi database");
            }
        }
        return connection;
    }
}