Networking Section Index

Java 5 introduced the abstract CookieHandler class to help with the process, though Java 5 lacks a usable implementation. You must implement yourself. Java 6 added the CookieManager for just such ...more

Starting with Java 5, there is an isReachable() method in the InetAddress class. You can specify either a timeout or the NetworkInterface to use. For more information on the underlying Internet Co...more

A URL String can be simply encoded using the static encode(String s, String enc) method within the URLEncoder class. encode(String s) has been deprecated with encode(String s, String enc) now bei...more

The URLConnection class contains various methods, which return specific header fields or the whole lot. Specific header fields can be obtained either by their name or the position of where they ...more

The URLClassLoader class was created specifically to facilitate the downloading of classes over a network. Three constructors are provided, the first of which simply takes a URL[] as an argument ...more

The JDesktop Integration Components (JDIC), available from https://jdic.dev.java.net, offers support for this: import java.net.*; import org.jdesktop.jdic.desktop.*; public class LaunchURL { ...more

The URL class contains a variety of accessor methods, which return the values of a URL's components. URL's use of accesors makes having to parse a URL to gain this information a thing of the pa...more

The InetAddress class gives the programmer a solution to this problem through a process called resolution. When an IP address is obtained from an host name we call this Host Name Resolution with ...more

A URL (Uniform Resource Locator) represents a reference to resource on a network. The resource may take many forms. Maybe it is an image stored on a web server of that sports car youve been dream...more

Your servlet must know how to speak NNTP, or call a library that does. There are NNTP implementation in the following packages: JavaMail: See the JavaMail:NNTP FAQ subtopic. Jakarta Commons...more

HttpUrlConnection headache and the TIMEOUT I have many links(urls) to be checked for their activeness. I want to set a timeout and check whether urls response within the timeout. My final goal i...more

I'm looking for information on how to write a java program that uses a http url connection object to request data from a servlet... however, I don't want to construct a new tcp/ip connection every ...more

Java application can't estabilish network connection, if the connection came up after application start. First I'm running a the java program below with no network connection. While the program run...more

A SocketChannel that has registered with the Selector showing interest in both OP_READ|OP_WRITE I would expect the select() method to continously return showing that the channel isWritable() until ...more

I want to interrupt an accept()-operation on a ServerSocketChannel with jdk14. But issueing an interrupt() blocks. here is a test program demonstrating this: import java.net.*; import java.nio.*;...more