java.io.FileNotFoundException

Question

I am trying to web scrape some data so that I can use it in my application.

The site I am trying to get data off is yahoo but I am getting a FileNotFoundException when it's trying to stream the data in.

I have also set the IP address and port explicitly.

Would be really thankful if someone can tell me where I am going wrong.

I have posted the sample code as well.

parentUrl = "http://www.yahoo.com";
pageUrl = new URL(parentUrl);
System.out.println(parentUrl);

try {
    in = new BufferedReader(new InputStreamReader(pageUrl.openStream()));
} catch(Exception ex2) {
    ex2.printStackTrace();
}

while ((inputLine = in.readLine()) != null) {
    out.write(inputLine);
    in.close();
}

out.close();

You need to show the code where you construct out. That'll be where the problem is. — Cameron Skinner
– Cameron Skinner, Commented Jan 31, 2012 at 6:04
Also note that you are calling in.close() inside your read loop. You'll never be able to read more than one line with this. — Cameron Skinner
– Cameron Skinner, Commented Jan 31, 2012 at 6:07
@CameronSkinner is right.. you just need to remove in.close() from your while loop. — Dawood
– Dawood, Commented Jan 31, 2012 at 6:12
@CameronSkinner - i removed that statement and pushed it outside the loop , its still giving me the same exception. its creating a file test.html in the desired location but with no data in it. — Nischal Hp
– Nischal Hp, Commented Jan 31, 2012 at 6:32
It would help if you showed us the actual exception stacktrace — Stephen C
– Stephen C, Commented Jan 31, 2012 at 6:40

Bohemian · Accepted Answer · 2012-01-31 06:51:25Z

1

The problem is in the initialization of out. You haven't shown us that code, but it will be something like:

OutputStream out = new FileOutputStream("non/existent/path/somefilename");

It's probably due to you using a relative path, so to help you debug it, I recommend you change it to:

File file = new File("non/existent/path/somefilename");
System.out.println(file.getAbsolutePath()); // start with this simple debugging
OutputStream out = new FileOutputStream(file);

My guess is that the path of the file is not where you think it is.

answered Jan 31, 2012 at 6:51

Bohemian♦

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