how to get the value of a string variable in java

Question

I send some values from one jsp page to another using link like -

<a href="get.jsp?value=Mobile">Mobile Phones</a>

In the nex page i get the value using request.getParameter like-

if (request.getParameter("value") == "Mobile") {
         electronicType = "Mobile Phone";
}

Then I want to make another link using the value like-

<a href="mob.jsp">electronicType</a>

Instead of electronicType I want the value of electronicType. But I can not get the value of electronicType. please somebody help me.

reply so that v know you have got ur answer and v can close this question — Santino 'Sonny' Corleone
– Santino 'Sonny' Corleone, Commented Jul 3, 2014 at 7:26

Santino 'Sonny' Corleone · Accepted Answer · 2014-07-03 07:19:13Z

1

if (request.getParameter("value") == "Mobile") {
         electronicType = "Mobile Phone";
}

This is wrong,for comparison in java you need to use .equals So your code should be

if (request.getParameter("value").equals("Mobile")) {
             electronicType = "Mobile Phone";
    }

== you can use for number or if you want to check if an object is null

For example if(object == null)

But for Strings you need to use .equals

Read the SO post that Sotirios Delimanolis has suggested

And in your <a href="mob.jsp">electronicType</a> use JSP tags like this

<a href="mob.jsp"><%=electronicType%></a>

Or a better way

<a href="mob.jsp"><c:out value="${electronicType}" /></a>

edited Jul 3, 2014 at 7:19

answered Jul 3, 2014 at 7:11

Santino 'Sonny' Corleone

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Comments

Tusar · Accepted Answer · 2014-07-03 07:19:06Z

1

AS suggested by @Sanito use equals() instead of = to comparing String

<a href="mob.jsp"><c:out value="${electronicType}" /></a>

used JSTL to print value

answered Jul 3, 2014 at 7:19

Tusar

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Comments

Darshan Lila · Accepted Answer · 2014-07-03 07:16:42Z

0

First of all note that you are not comparing two strings right way. Use equals() method.

For electronicType, add a session varible for electronicType and use it whenever you need from session. Otherway is to add it in the url.

answered Jul 3, 2014 at 7:16

Darshan Lila

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