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JDBC Class.forName vs DriverManager.registerDriver
To connect with a database using JDBC you need to select get the driver for the respective database and register the driver. You can register a database driver in two ways −
Using Class.forName() method − The forName() method of the class named Class accepts a class name as a String parameter and loads it into the memory, Soon the is loaded into the memory it gets registered automatically.
Class.forName("com.mysql.jdbc.Driver");Example
Following JDBC program establishes connection with MySQL database. Here, we are trying to register the MySQL driver using the forName() method.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class RegisterDriverExample {
public static void main(String args[]) throws SQLException {
//Registering the Driver
Class.forName("com.mysql.jdbc.Driver");
//Getting the connection
String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established: "+con);
}
}Output
Connection established: com.mysql.jdbc.JDBC4Connection@4fccd51b
Using the registerDriver() method − The registerDriver() method of the DriverManager class accepts an object of the diver class as a parameter and, registers it with the JDBC driver manager.
Driver myDriver = new com.mysql.jdbc.Driver(); DriverManager.registerDriver(myDriver);
Example
Following JDBC program establishes connection with MySQL database. Here, we are trying to register the MySQL driver using the registerDriver() method.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class RegisterDriverExample {
public static void main(String args[]) throws SQLException {
//Registering the Driver
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//Getting the connection
String mysqlUrl = "jdbc:mysql://localhost/mydatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established: "+con);
}
}Output
Connection established: com.mysql.jdbc.JDBC4Connection@4fccd51b
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