UnknownHostException again!

Question

I posted one question previously and all of them answered that there is some problem with DNS but i changed my DNS to many addressed and now i have the most reliable, google DNS :-

8.8.8.8

Still i get the same UnknownHostException. What can be the problem? This is my code :-

 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
                DocumentBuilder db = dbf.newDocumentBuilder();
                Document doc = db.parse("http://rss.news.yahoo.com/rss/india");

Infact if i pass address as something very common like :- http://google.com i still get the same error. Please help me :(. I have my submissions tomorrow.

Thanks in advance :)

EDIT : If i type the same address in my mozilla, it works great. So, i am sure that there is no DNS problem.

2nd EDIT :- I found this link http://www.ehow.com/how_4747553_fix-unknownhostexception-java-applications-ubuntu.html

But when i run the command

sudo apt-get install lib32nss-mdns

i get package not found.

Somebody even mentioned :-

-Djava.net.preferIPv4Stack=true

But where do i write this statement of Djava?

I am using Netbeans 6.8 to run my web application

OscarRyz · Accepted Answer · 2010-06-16 16:19:45Z

2

Probably you need a proxy.

If so, try passing it in the command line

 java  -Dhttp.proxyHost=your.proxy.server  -Dhttp.proxyPort=80 YourJavaApp

EDIT to set this information ( -Dhttp...etc etc ) in netbeans use the Run menu:

Run\Set Project Configuration\Customize\Run

Should look like this:

run http://img227.imageshack.us/img227/7903/netbeansy.png

Use the one that says: Virtual machine options and type:

-Dhttp.proxyHost=your.proxy.server  -Dhttp.proxyPort=80

Or as per your update type:

-Djava.net.preferIPv4Stack=true

edited Jun 16, 2010 at 16:19

answered Jun 16, 2010 at 16:05

OscarRyz

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1 Comment

TCM Over a year ago

Can you just tell me where should i write this line -Djava.net.preferIPv4Stack=true in Netbeans?

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