Networking Section Index | Page 18

When you try to create a new URL by calling its constructor, it will throw a MalformedURLException if the URL string is not parseable or contains an unsupported protocol.

A timeout in a network application happens when a reply isn't received in a timely manner. Timeouts usually need to be handled in an application-specific manner because there is no "right" thing ...more

Internet Protocol, or IP, provides an unreliable packet delivery system--each packet is an individual, and is handled separately. Packets can arrive out of order or not at all. The recipient does...more

One way to do this is by using a URLConnection to open a stream to your desired URL, then copy the data out of the stream to a file on your local file system. As an example, here's a little snip...more

To have your URLConnection object use a proxy, you will first need to set some system properties: Properties properties = System.getProperties(); properties.put("http.proxyHost", "...more

The JINI-USERS mailing list has a FAQ at http://www.artima.com/jini/faq.html. In addition, Sun maintains a FAQ at http://www.sun.com/jini/faqs/.more

The code snippet: String host = InetAddress.getByName("216.217.9.172").getHostName(); should give you the hostname www.jguru.com

The code snippet: ip =InetAddress.getByName("www.jguru.com").getHostAddress(); should give you the IP address 216.217.9.172

Objects that implement Serializable may be sent across a socket connection using an ObjectInputStream and ObjectOutputStream combination. Here are the steps to follow: First, define an object to ...more

RFC stands for "Request for Comment". The RFCs form an integral part of the Internet standards; standards are formed by first publishing a specification as an RFC. If you wish to implement a s...more

Java uses two system properties to designate a proxy: http.proxyHost and http.proxyPort. For applets, these are automatically set to use the browser's settings. However, in an application you need...more

Core Jini is probably the best book currently available for learning how to use Jini. The Jini Specification is also available, but as its name implies it is the specification, and contains only a...more

Sun manages the JINI-USERS mailing list. A searchable archive of this list can be found at http://archives.java.sun.com/archives/jini-users.html. There is also a link on that page which lets you ...more

Time-to-live, or TTL, is an 8-bit unsigned byte that is assigned to each multicast packet. For each route, the TTL value stored in the packet is decremented. When it reaches zero, the packet is ...more

Two reasons: speed and overhead. UDP packets have almost no overhead--you simply send them then forget about them. And they are fast, because there is no acknowledgement required for each pack...more