babu sharath

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since Jul 06, 2006
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Recent posts by babu sharath

What is cmd.exe in the code
I am running in UNIX environment
When I run the code I am getting following error :

java.io.IOException: cmd.exe: not found
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:52)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at Sample.getEnv(Sample.java:19)
at Sample.main(Sample.java:10)
11 years ago
due to some reasons I dont want to use -D option
If I have 10 enviromnet variables , than everytime -D with 1- those variables is not a good option i think
11 years ago
HI ,

I created a environment variable using:
setenv file_name /home/test/a.txt
How to access that environment variable from java code.
I tried
String s = System.getenv("file_name");
I am getting following error when runnig :

Exception in thread "main" java.lang.Error: getenv no longer supported, use properties and -D instead: input
at java.lang.System.getenv(System.java:691)
at Li.main(Li.java:6)

Than I tried
String s = System.getProperty("file_name"); It is giving null as output

How to access the environment vatiable ?
11 years ago
Hi ,
I am using java1.4
I write following code.
Problem is : In the end new file is created , but it is empty nothing is written
in that file . Why ? line1 and line2 should be placed in the file , why it is not happening ?

import java.io.*;
class Test
{
public static void main(String args[])
{
try {
File f = new File("test12.txt");
if(!f.exists())
f.createNewFile();
FileWriter fw = new FileWriter(f);
PrintWriter pw = new PrintWriter(fw);
pw.println("line1");
pw.println("line2");
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
HI ,
Sorry I didn't wrote the complete code earlier :

File file = new File("test_file");
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
while( (line=br.readLine()) != null )
{
line = line.trim();
System.out.println( line );
if (line.charAt(0)=='#')
{
continue;
}
}
( When a line starts with a # I want to ignore that )
In above senario , file is read upto empty line and next lines were not read
what is the problem with above code ?

Sharath
HI ,
I want to read the file and print the contents of file.
For that I wrote :

File file = new File("test_file");
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
while( (line=br.readLine()) != null )
{
line = line.trim();
System.out.println( line );
}

Above is working if there is no blank lines in the file.
If file is like below :
test1
test2

test3
End of file.

Then it is printing first two lines only.Because 3rd line is empty.
How to handle this situation ? Is readLine() takes that empty line as null ?

Regards,
Sharath
Hi ,
Thanks .. Now it is working ..
Earlier web-app tag was ...
<web-app xmlns="http://java.sun.com/ns/j2ee"
xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version=" 2.4">
Now I changed to what it is mentioned in the post.
It is working now ....

Regards,
Sharath
Hi ,
In servlet I wrote request.setAttribute("test",somestringarray );
In JSP I used EL to retrive that array contents like
${test}
But in output those array contents are not coming .. in out put
${test} is coming ...

Do I have to write anything to enable EL

Regards,
Sharath
Hi ,

we have many books in market like HFSJ and others , how do you think that
your book is better than those ? what are the features ??

Regards,
Sharath
ONE MORE QUESTION : do i need to do anything after passing the exam , like filling any form on net ?
I passed the exam on Aug 3, 2006. I haven't got the certificate yet. In cert manager it says kit was mailed 2 weeks back. How long does it take to reach here? I'm in mangalore, India.

in certmanager where did I get the message that it was mailed already .
after logging into certmanager i am unable to find that info .
PLEASE HELP ME REGARDING THIS
where is mailing status there .. i didn't find mailing status any where ..
it is working fine ( /manager/html)
xml file i written is :
<web-app xmlns="http://java.sun.com/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">

<servlet>
<servlet-name> select </servlet-name>
<servlet-class>com.example.web.Status </servlet-class>
</servlet>

<servlet-mapping>
<servlet-name> select </servlet-name>
<url-pattern> /Selectname.do </url-pattern>
<servlet-mapping>

</web-app>