学习(编程技巧_编程知识_程序代码),是学习编程不可多得的学习精验

				Java源码：URL编程
				 
				
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				第八军团 时间：2004-1-23 15:45:52 
				   
				Example 1 Below is a simple Java program which can get the hostname of a computer 
				from IP address. download now  
				
				Tips  
				1. Compile: javac GetHost  
				2. Run: java GetHost 111.111.111.1(your IP or others)  
				import java.io.*; 
				import java.net.*; 
				// 
				// 
				// GetHost.java 
				// 
				// 
				public class GetHost  
				{ 
				public static void main (String arg[]){ 
				if (arg.length>=1){ 
				InetAddress[] Inet; 
				int i=1; 
				try{ 
				for (i=1;i				Inet = InetAddress.getAllByName(arg[i-1]); 
				for (int j=1;j				System.out.print(Inet[j-1].toString()); 
				System.out.print("\n"); 
				} 
				} 
				} 
				catch(UnknownHostException e){ 
				System.out.print("Unknown HostName!"+arg[i-1]); 
				} 
				} 
				 else{ 
				System.out.print("Usage java/jview GetIp "); 
				 } 
				} 
				} 
				
				
				
				Example 2 
				download now 
				//GetHTML.java 
				/** 
				 * This is a program which can read information from a web server. 
				 * @version 1.0 2000/01/01 
				 * @author jdeveloper 
				**/ 
				import java.net.*; 
				import java.io.*; 
				
				public class GetHTML { 
				public static void main(String args[]){ 
				if (args.length < 1){ 
				System.out.println("USAGE: java GetHTML httpaddress"); 
				System.exit(1); 
				} 
				String sURLAddress = new String(args[0]); 
				URL    url = null; 
				try{ 
				   url = new URL(sURLAddress); 
				}catch(MalformedURLException e){ 
				   System.err.println(e.toString()); 
				                   System.exit(1); 
				} 
				try{ 
				                   InputStream ins = url.openStream(); 
				   BufferedReader breader = new BufferedReader(new InputStreamReader(ins)); 
				                   String info = breader.readLine();   
				                   while(info != null){ 
				                        System.out.println(info); 
				                        info  = breader.readLine();   
				   }    
				} 
				                catch(IOException e){ 
				   System.err.println(e.toString()); 
				                   System.exit(1); 
				} 
				} 
				}