//Example 6 of Chapter 9

import java.net.*;
import java.io.*; 

public class NetIpAddressSocketServerDemo
{
	public static void main( String[] args )
	{
		try{
			boolean flag = true;
			Socket Socket = null;
			String InputLine;
			
			ServerSocket serverSocket = new ServerSocket( 0 );
			System.out.println( "服務(wù)器等待：" + serverSocket.getLocalPort() );
			while( flag )
			{
				Socket = serverSocket.accept();
				DataInputStream is = new DataInputStream( 
					new BufferedInputStream( Socket.getInputStream() ) );
				PrintStream os = new PrintStream( 
					new BufferedOutputStream( Socket.getOutputStream() ) );
				while( ( InputLine = is.readLine( ) )!= null )
				{
					if( InputLine.equals( "The End" ) )
					{
						flag = false;
						break;
					}
					os.println( InputLine );
					os.flush();
				}
				os.close();
				is.close();
				Socket.close();
			}
			serverSocket.close();
		}
		catch( IOException e )
		{
			System.out.println( e.toString(  ) );
		}
	}
}