tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ryan Rich <ryanr...@richservices.com>
Subject Re: getParameter not comparing to Strings
Date Thu, 18 May 2000 17:03:44 GMT
You cannot compare Strings using ==, you must use the method equals().

Instead of:
if (request.getParameter("someparameter") == myrequest) { 

Use:
if (request.getParameter("someparameter").equals(myrequest)) {


 
On Thu, 18 May 2000, Richard McKinley wrote:

> When I use request.getParameter() it returns a string that look exactly like
> the string to which I want to compare it.  Alas, the result of the compare
> is that they are not the same.  Attached is a small .jsp that shows the
> problem.  What am I doing wrong?
> 
> 
> ***********start getparameter.jsp**************
> <%
> String myrequest = "fish";
> %>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> <head>
> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
> 
> <!-- The expression tags interpolate script variables into the HTML -->
> 
> <title>getrequest</title>
> </head>
> 
> <body bgcolor=white>
> 
> <h1>
>   The result of request.getParameter("someparameter") = 
>   <%= request.getParameter("someparameter")%>
> </h1>
> <a href="getparameter.jsp?someparameter=<%= myrequest%>">test</a><br>
> <%
> if (request.getParameter("someparameter") == myrequest) {
>   out.print(request.getParameter("someparameter") + "==" + myrequest +
> "<br>");
> } else {
>   out.print(request.getParameter("someparameter") + "!=" + myrequest +
> "<br>");
> }
> %>
> </body>
> 
> --------------------------------------------------------------------------
> To unsubscribe, email: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commmands, email: tomcat-user-help@jakarta.apache.org
> 
> 


Mime
View raw message