SELECT tag problem

[varia]

Hi,

I need your help... I need to get the value selected by a user from the HTML page and pass this value into my servlet program for processing. So I did something like this:

Part of my jsp code:

<select name="tool" id="tool">
    <option value=kim>KIM</option>
    <option value=ontomat>Ontomat Annotizer</option>
    <option value=gate>GATE</option>
</select>

And:

Part of my java class protected void doGet(...) metod:

String s=request.getParameter("tool");
	out.println(s);
	if (s.toLowerCase()=="kim") 
	out.println(s);
        else 	out.println("error");

When I select "kim", I want it to print
kim
kim

My problem is that what ever I select it prints out
[what ever I selected]
error

The line

out.println(s);

prints what I selected but "if" part does not work the way I would like it to...

I am new at all this and could really use some help...

Thanks,
Jelena

[rakhi4110]

Hi varia,
Well the problem is not in the SELECT tag.
Try using this code in your JSP file

String check="kim";
        String s=request.getParameter("tool");
	out.println(s);
	if (s.toLowerCase().equals(check)) 
	out.println(s);
        else 	
	out.println("error");

This is because there is difference between == operator and the equals() method.
== operator is used to compare the references of the objects.

public boolean equals(Object o) is the method provided by the Object class. The default implementation uses ==
operator to compare two objects.

But since the method can be overriden like for String class. equals() method can be used to compare the values of two
objects.

String str1 = new String("MyName");
String str2 = new String("MyName");

if(str1 == str2){
out.println("Objects are equal")
}else{
out.println("Objects are not equal")
}

if(str1.equals(str2)){
out.println("Objects are equal")
}else{
out.println("Objects are not equal")
}

Output:
Objects are not equal
Objects are equal

Another snippet:

String str2 = "MyName";
String str3 = str2;

if(str2 == str3){
out.println("Objects are equal")
}else{
out.println("Objects are not equal")
}

if(str3.equals(str2)){
out.println("Objects are equal")
}else{
out.println("Objects are not equal")
}

Output:
Objects are equal
Objects are equal.

Check out this and reply whether your prob is solved or is there something else which i can do for you.
Thanks and Regards,
RAKHI

[varia]

rakhi,

Thanks a million... The problem is solved... It works great now...

Thank you,
Jelena

[rakhi4110]

Jelena,
You are welcome.. anytime to help you..
Since your problem is solved you can mark the status of this post as solved.

Thanks and regards,
RAKHI