What is the difference between the keywords throw and throws in exception handling?

They are used in different portions of the code for different purposes:

• throws: it declares that a method can potentially throw particular type or types of exception
• throw: it actually throws the exception

The difference between throws and throw is that throw is used to define user defined exceptions as per their requirement where as throws is used to propagate the exception

ex:
public class Servlet extends HttpServlet(HttpServletRequest req,HttpServletResponse res)throws IOException,ServletException
{
//code
}