The problem is related to objects. Whenever we define a variable for object only the reference of memory(where the actually data of object is stored) gets stored in it. The == operater is used to compare the values actually stored in those variables. So incase of object variables the == operator gets the memory address and not the value stored at that memory address.
The String is an object so it also applies to it. I hope I manage to explain it, if still have any doubt than you can ask again. -----Original Message----- From: "Villén Pizarro, Julia" [mailto:[EMAIL PROTECTED]] Sent: Friday, April 19, 2002 1:20 PM To: [EMAIL PROTECTED] Subject: Re: Question about page parameters type. String? This answers are very helpfull and my problem is solved, but not my curiosity. As you can see I'm not a Java expert but I don't understand why do I have to use this methods when color is a String. Just curiosity, thanks, Julia -----Mensaje original----- De: Vikramjit Singh [mailto:[EMAIL PROTECTED]] Enviado el: viernes, 19 de abril de 2002 5:54 Para: [EMAIL PROTECTED] Asunto: Re: Question about page parameters type. String? or a much faster way is like this <% String color; color=request.getParameter("color") if (color.intern() =="red") { -------------------------- whatever1 } else {whatever2} %> using intern() is quite fast since in equals() each character is checked which is quite time consuming which intern() gives you the canonical representation of the string. in your applications try to use intern() rather than equals(). Regards, Vikramjit Singh, Systems Engineer, GTL Ltd. Ph. 7612929-1031 -----Original Message----- From: Kesav, Ramesh [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 18, 2002 5:19 AM To: [EMAIL PROTECTED] Subject: Re: Question about page parameters type. String? Hi bhusan, That's one point but she is trying to compare using == method which is for object referecne but not the value. No need of casting as paramater always comes as a String and your color variable in the code is also a String so no need of casting. -----Original Message----- From: "Villén Pizarro, Julia" [mailto:[EMAIL PROTECTED]] <mailto:[mailto:[EMAIL PROTECTED]]> Sent: Thursday, April 18, 2002 5:22 PM To: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> Subject: Question about page parameters type. String? Hi all! I call my_page.jsp this way http://my_server/my_page.jsp?color=red <http://my_server/my_page.jsp?color=red> Then I retrieve the value of the parameter "color" and then try to match it, in the following way: <% String color; color=request.getParameter("color") if (color=="red") { whatever1 } else {whatever2} %> The answer is whatever2. I made sure the page is getting the parameter right by writing it out. The question is if I have to do any kind of casting. Thaks in advance, Julia ========================= To unsubscribe: mailto [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html <http://archives.java.sun.com/jsp-interest.html> http://java.sun.com/products/jsp/faq.html <http://java.sun.com/products/jsp/faq.html> http://www.esperanto.org.nz/jsp/jspfaq.jsp <http://www.esperanto.org.nz/jsp/jspfaq.jsp> http://www.jguru.com/faq/index.jsp <http://www.jguru.com/faq/index.jsp> http://www.jspinsider.com <http://www.jspinsider.com> ==========================================================================To unsubscribe: mailto [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html <http://archives.java.sun.com/jsp-interest.html> http://java.sun.com/products/jsp/faq.html <http://java.sun.com/products/jsp/faq.html> http://www.esperanto.org.nz/jsp/jspfaq.jsp <http://www.esperanto.org.nz/jsp/jspfaq.jsp> http://www.jguru.com/faq/index.jsp <http://www.jguru.com/faq/index.jsp> http://www.jspinsider.com <http://www.jspinsider.com> ==========================================================================To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com ========================= To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com ========================= To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com ==========================================================================To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com
