Hi
Hey Jean only Sachin has given you the right solution. He is right that you will get a
NullPointerException according to your sample of code. But I think probably you have
missed one line which should be : ----
<%
BufferedReader in = new BufferedReader(
new InputStreamReader(
yc.getInputStream()));
String inputLine;
try
{
inputLine = in.readLine(); //This is the missed line
}
catch(IOException exp)
{
}
if ( inputLine.substring(0,1) == "1" ) {
out.println("yes");
}
else {
out.println("no");
}
%>
Now in the above code do apply the Sachin's suggestions.
P.S. - It is also right that it is not a JSP problem it is pure Java.
Thanks & Regards
Bhushan Bhangale
http://www.bbhangale.com
----- Original Message -----
Couple of things.
1) The code which you have sent us would throw a NullPointerException as the
string variable inputLine is null when you use it in the if statement.
2) Please do try to understand the difference between the == operator and
the equals(String s) method, it shall relieve you of a lot of problems later
on as well in your programming career :-).Just a friendly suggestion.
3) Another easier way could be to use the startsWith(String s) method of the
java.lang.String class.
Have a nice day.
With regards,
Sachin S. Khanna.
www.emailanorder.com
----- Original Message -----
From: Jean Chiang (]iN) <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, January 02, 2001 10:53 AM
Subject: The comparison between string and char.
> I am new to JSP. Who is going to help me? Thanks in advance.
> I read some input from a text file and the first parameter is an int and
> others are string. I have to do different action according to the first
> parameter.
> A part of my source code is listed as follows:
>
> In this case, when my first parameter is "1", it still shows "no". What's
> wrong? I suppose it cannot compare char and string. but how can I deal
with
> this stuff?
>
>
> <% BufferedReader in = new BufferedReader(
> new InputStreamReader(
> yc.getInputStream()));
>
> String inputLine;
>
> if ( inputLine.substring(0,1) == "1" ) {
> out.println("yes");
> }
> else {
> out.println("no");
> }
> %>
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