mudclient.java

java 的164个例子的源代码,包括了 很多方面,供包括了19个方面的 源代码

					       name + ":");
                    location.createPlace(me, arg, back, name, desc);
                }
                // CLOSE: Close a named exit.  Note: only closes an exit
                // uni-directionally, and does not destroy a place.
                else if (cmd.equals("close")) {
                    if (arg.length() == 0) 
                      throw new IllegalArgumentException("direction expected");
                    location.close(me, arg);
                }
                // LINK: Create a new exit that connects to an existing place
                // that may be in another MUD running on another host
                else if (cmd.equals("link")) {
                    if (arg.length() == 0) 
                      throw new IllegalArgumentException("direction expected");
                    String host = getLine("What host are you linking to?: ");
                    String mud =
			getLine("What is the name of the MUD on that host?: ");
                    String place =
			getLine("What is the place name in that MUD?: ");
                    location.linkTo(me, arg, host, mud, place);
                    System.out.println("Don't forget to make a link from " +
				       "there back to here!");
                }
                // DUMP: Save the state of this MUD into the named file,
                // if the password is correct
                else if (cmd.equals("dump")) {
                    if (arg.length() == 0) 
                       throw new IllegalArgumentException("filename expected");
                    String password = getLine("Password: ");
                    location.getServer().dump(password, arg);
                }
                // QUIT: Quit the game
                else if (cmd.equals("quit")) {
                    try { location.exit(me, myname + " has quit."); } 
                    catch (Exception e) {}
                    System.out.println("Bye.");
                    System.out.flush();
                    System.exit(0);
                }
                // HELP: Print out a big help message
                else if (cmd.equals("help")) System.out.println(help);
                // Otherwise, this is an unrecognized command.
                else System.out.println("Unknown command.  Try 'help'.");
            }
            // Handle the many possible types of MudException
            catch (MudException e) {
                if (e instanceof NoSuchThing) 
                    System.out.println("There isn't any such thing here."); 
                else if (e instanceof NoSuchPerson) 
                   System.out.println("There isn't anyone by that name here.");
                else if (e instanceof NoSuchExit) 
                  System.out.println("There isn't an exit in that direction.");
                else if (e instanceof NoSuchPlace) 
                    System.out.println("There isn't any such place."); 
                else if (e instanceof ExitAlreadyExists)
                    System.out.println("There is already an exit " +
				       "in that direction.");
                else if (e instanceof PlaceAlreadyExists)
                    System.out.println("There is already a place " +
				       "with that name.");
                else if (e instanceof LinkFailed)
                    System.out.println("That exit is not functioning.");
                else if (e instanceof BadPassword) 
                    System.out.println("Invalid password."); 
                else if (e instanceof NotThere)      // Shouldn't happen
                    System.out.println("You can't do that when " +
				       "you're not there."); 
                else if (e instanceof AlreadyThere)  // Shouldn't happen
                    System.out.println("You can't go there; " +
				       "you're already there.");
            }
            // Handle RMI exceptions
            catch (RemoteException e) {
               System.out.println("The MUD is having technical difficulties.");
               System.out.println("Perhaps the server has crashed:");
               System.out.println(e);
            }
            // Handle everything else that could go wrong.
            catch (Exception e) {
                System.out.println("Syntax or other error:");
                System.out.println(e);
                System.out.println("Try using the 'help' command.");
            }
        }
    }
    
    /** 
     * This convenience method is used in several places in the
     * runMud() method above.  It displays the name and description of
     * the current place (including the name of the mud the place is in), 
     * and also displays the list of things, people, and exits in
     * the current place.
     **/
    public static void look(RemoteMudPlace p) 
	throws RemoteException, MudException
    {
        String mudname = p.getServer().getMudName(); // Mud name
        String placename = p.getPlaceName();         // Place name
        String description = p.getDescription();     // Place description
        Vector things = p.getThings();               // List of things here
        Vector names = p.getNames();                 // List of people here
        Vector exits = p.getExits();                 // List of exits from here

        // Print it all out
        System.out.println("You are in: " + placename +
			   " of the Mud: " + mudname);
        System.out.println(description);
        System.out.print("Things here: ");
        for(int i = 0; i < things.size(); i++) {      // Display list of things
            if (i > 0) System.out.print(", ");
            System.out.print(things.elementAt(i));
        }
        System.out.print("\nPeople here: ");
        for(int i = 0; i < names.size(); i++) {       // Display list of people
            if (i > 0) System.out.print(", ");
            System.out.print(names.elementAt(i));
        }
        System.out.print("\nExits are: ");
        for(int i = 0; i < exits.size(); i++) {       // Display list of exits
            if (i > 0) System.out.print(", ");
            System.out.print(exits.elementAt(i));
        }
        System.out.println();                         // Blank line
        System.out.flush();                           // Make it appear now!
    }
    
    /** This static input stream reads lines from the console */
    static BufferedReader in =
	new BufferedReader(new InputStreamReader(System.in));
    
    /** 
     * A convenience method for prompting the user and getting a line of 
     * input.  It guarantees that the line is not empty and strips off 
     * whitespace at the beginning and end of the line.
     **/
    public static String getLine(String prompt) {
        String line = null;
        do {                      // Loop until a non-empty line is entered
            try {
                System.out.print(prompt);             // Display prompt
                System.out.flush();                   // Display it right away
                line = in.readLine();                 // Get a line of input
                if (line != null) line = line.trim(); // Strip off whitespace
            } catch (Exception e) {}                // Ignore any errors
        } while((line == null) || (line.length() == 0));
        return line;
    }
    
    /**
     * A convenience method for getting multi-line input from the user.
     * It prompts for the input, displays instructions, and guarantees that
     * the input is not empty.  It also allows the user to enter the name of
     * a file from which text will be read.
     **/
    public static String getMultiLine(String prompt) {
        String text = "";
        for(;;) {  // We'll break out of this loop when we get non-empty input
            try {
                BufferedReader br = in;       // The stream to read from 
                System.out.println(prompt);   // Display the prompt
                // Display some instructions
                System.out.println("You can enter multiple lines.  " + 
				   "End with a '.' on a line by itself.\n" +
				   "Or enter a '<<' followed by a filename");
                // Make the prompt and instructions appear now.
                System.out.flush();
                // Read lines
                String line;
                while((line = br.readLine()) != null) {    // Until EOF
                    if (line.equals(".")) break;  // Or until a dot by itself
                    // Or, if a file is specified, start reading from it 
                    // instead of from the console.
                    if (line.trim().startsWith("<<")) {      
                        String filename = line.trim().substring(2).trim();
                        br = new BufferedReader(new FileReader(filename));
                        continue;  // Don't count the << as part of the input
                    }
		    // Add the line to the collected input
                    else text += line + "\n";  
                }
                // If we got at least one line, return it.  Otherwise, chastise
                // the user and go back to the prompt and the instructions.
                if (text.length() > 0) return text;
                else System.out.println("Please enter at least one line.");
            }
            // If there were errors, for example an IO error reading a file,
            // display the error and loop again, displaying prompt and
            // instructions
            catch(Exception e) { System.out.println(e); }
        }
    }

    /** This is the usage string that explains the available commands */
    static final String help = 
	"Commands are:\n" + 
	"look: Look around\n" +
	"examine <thing>: examine the named thing in more detail\n" +
	"describe <person>: describe the named person\n" +
	"go <direction>: go in the named direction (i.e. a named exit)\n" +
	"say <message>: say something to everyone\n" +
	"do <message>: tell everyone that you are doing something\n" +
	"talk <person>: talk to one person.  Will prompt for message\n" +
	"change: change how you are described.  Will prompt for input\n" +
	"create <thing>: create a new thing.  Prompts for description \n" +
	"destroy <thing>: destroy a thing.\n" + 
	"open <direction>: create an adjoining place. Prompts for input\n"+
	"close <direction>: close an exit from this place.\n" +
	"link <direction>: create an exit to an existing place,\n" +
	"     perhaps on another server.  Will prompt for input.\n" +
	"dump <filename>: save server state.  Prompts for password\n" +
	"quit: leave the Mud\n" +
	"help: display this message";
}