JDK Tutorials - Herong's Tutorial Examples - v6.32, by Herong Yang
What Is a Datagram?
This section describes what is a datagram - An independent and self-contained message sent over the network whose arrival, arrival time, and content are not guaranteed.
Datagram: An independent and self-contained message sent over the network whose arrival, arrival time, and content are not guaranteed. This definition is copied from the Sun's Java tutorial document. A datagram should at least contain the following information:
Datagram Socket: A logical concept represents the contact point on the local system of a datagram communication link.
Internet Address: A unique number to identify each computer system on the Internet.
Port: A number representing an entry point of on a computer system on the Internet, where a two-way communication link can be established.
Local System: The computer system at this end of a communication link.
Remote System: The computer system at the other end of a two-way communication link.
A datagram communication link on the Internet involves:
The following diagram illustrates how application programs can use datagram socket send data to another computer system through a datagram communication link on the Internet:
Computer System I Computer System II Datagram|Address a| Internet |Address b|Datagram Sender<--->Socket|Port 1 |----------->| Port 2|Socket<--->Receiver
Table of Contents
Date, Time and Calendar Classes
Date and Time Object and String Conversion
Number Object and Numeric String Conversion
Locales, Localization Methods and Resource Bundles
Calling and Importing Classes Defined in Unnamed Packages
HashSet, Vector, HashMap and Collection Classes
Character Set Encoding Classes and Methods
Encoding Conversion Programs for Encoded Text Files
►Datagram Network Communication
Establishing a Datagram Communication Link
DatagramServer.java - A Datagram Server Application
DatagraClient.java - A Datagram Client Application
DOM (Document Object Model) - API for XML Files
DTD (Document Type Definition) - XML Validation
XSD (XML Schema Definition) - XML Validation
XSL (Extensible Stylesheet Language)
Message Digest Algorithm Implementations in JDK
Private key and Public Key Pair Generation
PKCS#8/X.509 Private/Public Encoding Standards
Digital Signature Algorithm and Sample Program
"keytool" Commands and "keystore" Files
KeyStore and Certificate Classes
Secret Key Generation and Management
Cipher - Encryption and Decryption
The SSL (Secure Socket Layer) Protocol
SSL Socket Communication Testing Programs