java WebService
In recent years, web services have emerged as a popular technology for remote method calls. Technically, a web service has two components:
A service that can be accessed with the SOAP transport protocol
A description of the service in the WSDL format
SOAP is an XML protocol for invoking remote methods, similar to the protocol that RMI uses for the communication between clients and servers. Just as you can program RMI applications without knowing anything about the details of the RMI protocol, you don't really need to know any details about SOAP to call a web service.
WSDL is an interface description language. It too is based on XML. A WSDL document describes the interface of a web service: the methods that can be called, and their parameter and return types. In this section, we generate a WSDL document from a service implemented in Java. This document contains all the information that a client program needs to invoke the service, whether it is written in Java or another programming language.
相关文档：
贴子中部分源代码摘自csdn的一篇帖子， 参考了他们的理解，说说自己的一些见解：
//源代码：
class A {
public String show(D obj){
return ("A and D");
......
public class DES {
// 声明常量字节数组
private static final int[] IP = {
58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54,
......
import java.net.InetAddress;
import java.io.InputStream;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.text.ParseException;
import java.util.StringTokenizer;
public final class NetworkInfo {
private final static String getMacAddress() throws IOException {
String ......
据InternetNews.com报道，作为今年的第一次更新，Java SE 6 Update 18（也称为6u18）不仅修复了超过300个bug（够多的啊），而且更值得注意的是，提升了虚拟机HotSpot的性能，这将同时有益于Java和JavaFX（基于JVM的RIA方案）应用程序。
此外，Java安装器的底层机制被替换，可用性大大提高。
jar文件创建长期存在的一个bug ......
