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The "http protocol" is a stateless response or request based protocol.
You may contain the state information between different page requests as given below:
HTTP Sessions are the recommended useful approach. A session finds the requests that originate from the same browser in the mean while the period of conversation. All the servlets may share the similar session. The JSESSIONID is started by the server and may be passed to client through URL re-writing (if cookies are turned off), cookies or built-in SSL process. Care could be given to minimize size of objects stored in session and objects stored in session could be serializable. In a Java servlet the session may be retrieve as given:
HttpSession session = request.getSession(true); //gives a current session or a new session
//To get/put a value in/from the session
Name name = new Name("Parker");
session.setAttribute("lastname", name); //session.putValue(...) is deprecated as of 2.2
session.getAttribute("lastname");//get a value. session.getValue(...) is deprecated
//If a session is no longer needed e.g. user has logged out, etc then it may be invalidated. session.invalidate();
//you may also set the session inactivity lease period on every session basis session.setMaxInactiveInterval(300);
Write a short note on image preloading process? The primary use of image preloading procedure is to download the image within the cache before it is actually required to displa
Both Java and C++ use same syntax and are Object Oriented, but there are several differences between Java and C++: 1. Java does not use pointers. Pointers are inherently
Finding an Applet's Size When running inside a web browser the size of an applet is set through the height and width attributes and cannot be changed by the applet. Several app
A JSP page is a text-based document that having two types of text: static template data, which can be expressed in any text-based format like HTML, SVG, WML, and XML, and JSP eleme
I want to develop a Chat application for j2me Project Description: We require a chat application for a community website. Skills required: Java, J2ME
You have recently joined a games company. The SQA manager has given you the task of improving the code quality of simple games. This is a standard task which the SQA manager gives
Write a program of else statement in java? The else statement in Java // This is the Hello program in Java class Hello { public static void main (String args[]) { if (
public class Foothill { public static void main(String[] args) { Client person_1 = new Client("Bruce Ruprecht", 16000, 10); Writer writer_1 = new Writer("Adam Buf
In the airplane program, you may have noticed that the loading of each image appears to be jerky, erratic, or slow, and that the URL for each image flickers in the status bar each
explain jumps in loops and explain labelled loops
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