Help with this class implementing JDBC

[lo2]

Hi there I have this class:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class ConnTest {
	public static void main(String args[]){

		String dbuser = "db_abc";
		String passwd = "yourpassword";
		
		Connection conn;
		int port = 1521;
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
			conn = DriverManager.getConnection(
					"jdbc:oracle:thin:@localhost:"+port+":dbwc", dbuser, passwd);
			conn.setAutoCommit(false);
			
		PreparedStatement s = conn.prepareStatement("Select * from Ships");
		
		ResultSet rs = s.executeQuery();
		
		while (rs.next()){
			String sname = rs.getString(1);
			String sclass = rs.getString(2);
			String slaunched = rs.getString(3);
			
			System.out.println(sname + ":" + sclass + ":" + slaunched);
		}
		
		} catch(SQLException e) {
			System.out.println(e);
		} catch(ClassNotFoundException e) {
			System.out.println(e);
		}

	}
}

I would really like to get explained what is happening in these lines:

Class.forName("oracle.jdbc.driver.OracleDriver");
			conn = DriverManager.getConnection(
					"jdbc:oracle:thin:@localhost:"+port+":dbwc", dbuser, passwd);

What does this Class.forName do? And where is the DriverManager object created?

[wsaryada]

Applications no longer need to explictly load JDBC drivers using Class.forName(). Existing programs which currently load JDBC drivers using Class.forName() will continue to work without modification.

When the method getConnection is called, the DriverManager will attempt to locate a suitable driver from amongst those loaded at initialization and those loaded explicitly using the same classloader as the current applet or application.

You can read more on the following link: DriverManager (Java Platform SE 7 )

[makpandian]

Class.forName("X") loads the class if it not already loaded on JVM. Typically its called dynamic class loading.