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PODiffrerent users have access the same variables in my servlet
 

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    <p><br/> Firstly, thanks for reading my question.. I am newbie in programming servlets, and i have come up with this problem: In my webApplication differrent users have access in the same variables and this is sth that i dont want to happen. I have the sense that i haven't construct My webApplication well so i will present it. In my JSP pages when i want to call the servlet to do some process, i always call it with this way:</p> <pre><code>&lt;a href="MyServlet?check"&gt;Some Html Code&lt;/a&gt; &lt;a href="MyServlet?show"&gt;Some Html Code&lt;/a&gt; </code></pre> <p>I chose this way because i wanted to pass FROM the jsp TO the servlet a parameter (in this case "check", in order to inform the servlet "hey you, the user clicked the button check") - (can i do this with another way?) Anyway! So, in MyServlet i have written this:<br/><br/><strong>MyServlet</strong></p> <pre><code>import javax.servlet.http.HttpServlet //i import and many others.. public class MyServlet extends HttpServlet{ private int count1; //these are the variables that see all the users private String Title; protected void processRequest(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException { if(request.getQueryString().equals("check")){ //do some stuff and then put a value (its not random) in the count1 count1 = 10; //lets say this value its 10 for a user1. request.setAttribute("count", count1); RequestDispatcher disp = getServletContext().getRequestDispatcher("/page1.jsp"); disp.forward(request, response); } else if (request.getQueryString().equals("show")){ //do some stuff and then put a value in the count1 title = "title"; //same here request.setAttribute("title", title); RequestDispatcher disp = getServletContext().getRequestDispatcher("/page2.jsp"); disp.forward(request, response); } } </code></pre> <p>So in MyServlet i have nested if-else statements for all the links in my jsp. As i said in the beginning all the users in my application have access in the same variables. So if user1 after he clicked the button check the variable count1 takes a value 10, and then an other user2 clicks the same buttons and the variable takes an another value (e.g 20), then the user1 has also the value 20... <br/><br/>I tried to put the definitions of the variables inside the method processRequest but then i have to initialize the variables firstly, as the IDE Enviroment i use, alert me that in the lines i use these variables that the variables may not have been initialized.But i dont want to init the variables, because everytime i call the servlet all the variables init and i loose the value that had before..<br/><br/>What should i do? thanks a lot!</p>
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