• URL = Uniform Resource Locator
• WWW access: images, classes or text.
• Security: Access check for URL's from different hosts as the server or client.
• Loading text data is similar to reading from file.

public String open_url(String filename)
{
	try
	{
		return load( new BufferedReader(
			new InputStreamReader(
				new URL(filename).openStream())));
	}
	catch(FileNotFoundException file_not_found_exception)
	{
		System.err.println(filename+" read error:"
			+file_not_found_exception+"!");
		file_not_found_exception.printStackTrace();
	}

	return null;
}