Go4Expert - String compare with Form field

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String compare with Form field

I am new to JSP and am having trouble comparing string with the value in a form field submitted.

The following is the code that I am executing through Tomcat and is not giving me the desired result:

Code: java

Code:

<%

String myvar = request.getParameter("var1");

boolean first = false;

if (myvar == null) {  

        first = true;

} else {

        if (myvar == "compareme") out.println("string matches"); else out.println("string MISMATCH");                  

}

%>

<html>

<head><title>String compare with Form Input</title></head>

<body>

<h2>If you enter input as "compareme", I should say "MATCH", 

else "MISMATCH"</h2>

<% if (! first) { %>

Input was <%= myvar %> <br>

<% }  %>

<hr>

<form>Please enter a string <input name=var1>

and <input type=submit></form>

</body>

</html>

You will notice that even though the correct string "compareme" is submitted in the form, the string comparison still fails. I have tried appending .toString() and .trim() to myvar but that has not helped either.

I am obviously missing something very basic in JSP. Please help

Re: String compare with Form field

Ok, posting the code once again for increased legibility:

Code: java

Code:

<%

String myvar = request.getParameter("var1");

boolean first = false;

if (myvar == null) {  

        first = true;

} else {

        if (myvar == "compareme") out.println("string matches"); else out.println("string MISMATCH");                  

}

%>

<html>

<head><title>String compare with Form Input</title></head>

<body>

<h2>If you enter input as "compareme", I should say "MATCH", else "MISMATCH"</h2>

<% if (! first) { %>

Input was <%= myvar %> <br>

<% }  %>

<hr>

<form>Please enter a string <input name=var1>

 and <input type=submit></form>

</body>

</html>