connectserver.java

精通java核心技术》随书源代码

public class ConnectServer
{
	  public static void connectServer( int port ) throws UserDefinedException
	  {
	      if ( ( port < 80 ) || ( port > 1000 ) )
	          throw new UserDefinedException( port );
	   }

 	   public static void main(String[] args) 
      {
         int port = 1001;
         try {
	          connectServer( 1001 );
	      }
	      catch ( UserDefinedException e ) 
	      {
	          System.out.println( e.toString() );
	      } 
     }
  }