How to connect MySQL Database from Java

In order to connect MySQL database with Java one need to use below mentioned sample script:

<%@ page import="java.sql.*" %>
<%@ page import="com.mysql.jdbc.Driver" %>

<%!
Class.forName("com.mysql.jdbc.Driver").newInstance ();
java.sql.Connection conn;
conn = DriverManager.getConnection(
"jdbc:mysql:///?user=&password=") ;
%>