package coreservlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; /** Example using servlet initialization and the * getLastModified method. *

* Taken from Core Servlets and JavaServer Pages * from Prentice Hall and Sun Microsystems Press, * http://www.coreservlets.com/. * © 2000 Marty Hall; may be freely used or adapted. */ public class LotteryNumbers extends HttpServlet { private long modTime; private int[] numbers = new int[10]; /** The init method is called only when the servlet * is first loaded, before the first request * is processed. */ public void init() throws ServletException { // Round to nearest second (ie 1000 milliseconds) modTime = System.currentTimeMillis()/1000*1000; for(int i=0; i\n" + "

" + title + "

\n" + "Based upon extensive research of " + "astro-illogical trends, psychic farces, " + "and detailed statistical claptrap, " + "we have chosen the " + numbers.length + " best lottery numbers for you." + "

" + numbers[i]); } out.println("

" + ""); } /** The standard service method compares this date * against any date specified in the If-Modified-Since * request header. If the getLastModified date is * later, or if there is no If-Modified-Since header, * the doGet method is called normally. But if the * getLastModified date is the same or earlier, * the service method sends back a 304 (Not Modified) * response, and does not call doGet. * The browser should used its cached version of * the page in such a case. */ public long getLastModified(HttpServletRequest request) { return(modTime); } // A random int from 0 to 99. private int randomNum() { return((int)(Math.random() * 100)); } }