Problem with timers in a udp state pattern

Hi.
As a project on my school, i have created a bomberman game, that supports up to 4 players on a network. And it works fine, when there is no network timers involved, that means no packet loss handling.
The network part of the game, is build up by UDP, to make the application support multicast. The game session flow, is build up by states which are designed like an extended 2 phase commit pattern.
That means, the server sends Gameinfo to the clients. Then all the cliens replies with an ACK.
The server then sends ExecuteGameinfo. Then the clients replies with an ACK.
The server sends/requests playerinfo, and the clients reply with player info. (the server uses the player info to create gameinfo).
These 3 states, continues to go on, as long as the game is running. And without timers, it is working great.
But what if a packet is lost? (on a LAN, packetloss is very rare, but for the sake of my project�s issue, custom made reliability in UDP, I have to face the problem). Then the server would just hang, and wait for the client reply.
To avoid that, i want to use a timer. If the server havent got any reply for like a 100 ms., the server should resend the package.
And now to the actual problem :)
Ive tried using java.util.Timer, and javax.swing.Timer. But both timers does not work in my case. Its like:
Server starts timer.
Server sends Gameinfo.
100 ms passes.
Server resends Gameinfo.
Server restarts timer.
100 ms passes.
(this goes on for 5 times, and then the client is kicked)
Server receives ACK.
Server receives ACK.
Server receives ACK.
Server receives ACK.
Server receives ACK.
On the client side it looks like this:
Recieves Gameinfo, replies with ACK
Recieves Gameinfo, replies with ACK
x 5
So its like the server is to concentrated on that timer (even though it runs as a thread), so i doesent notice the incoming packets, that eventually stacks up, and is handled after the timer tasks are done.
And this is exactly the problem that is described in the Timer api: " Timer tasks should complete quickly. If a timer task takes excessive time to complete, it "hogs" the timer's task execution thread. This can, in turn, delay the execution of subsequent tasks, which may "bunch up" and execute in rapid succession when (and if) the offending task finally completes."
Ive tried using a homemade timer, with a Thread.sleep(), it is a bit better, but the problem is the same. 1 out of 20 incoming packets, is "ignored" by the server.
I really hope any of you can help.
I havent included any code, it would be to much code. But if you are interested in looking at something i can easily paste it.
Thank you very much for your time :)
Regards.

Don't use a Timer, use DatagramSocket.setSoTimeout(). Then your receives will only block for that amount of time, throwing SocketTimeoutException if no datagram arrives.

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Thanks in advance!
Write a program that determines the number of consonants, vowels, punctuation characters, and spaces in an input line.
Read in the line into a String (in the usual way). Now use the charAt() method in a loop to access the characters one by one.
Use a switch statement to increment the appropriate variables based on the current character. After processing the line, print out
the results.
import java.util.Scanner;
class Kap43A1
public static void main ( String[] args )
    String line;
    char letter;
    int total, countV=0, countC=0, countS=0, countU=0, countP=0;
    Scanner scan = new Scanner(System.in);
    System.out.println( "Please write a sentence " );
    line = scan.nextLine();
    total=line.length(); //Gesamtanzahl an Zeichen des Satzes
    for (int counter=0; counter<total; counter++)
      letter = line.charAt(counter); //ermitteln des Buchstabens an einer bestimmten Position des Satzes
      switch (letter)
        case 'A': case 'a':
        case 'E': case 'e':
        case 'I': case 'i':
        case 'O': case 'o':
        case 'U': case 'u':
          countV++;
          break;
        case 'B': case 'b': case 'C': case 'c': case 'D': case 'd': case 'F': case 'f': case 'G': case 'g': case 'H': case 'h':
        case 'J': case 'j': case 'K': case 'k': case 'L': case 'l': case 'M': case 'm': case 'N': case 'n': case 'P': case 'p':
        case 'Q': case 'q': case 'R': case 'r': case 'S': case 's': case 'T': case 't': case 'V': case 'v': case 'W': case 'w':
        case 'X': case 'x': case 'Y': case 'y': case 'Z': case 'z':
          countC++;
          break;
        case ' ':
          countS++;
          break;
        case ',': case '.': case ':': case '!': case '?':
          countP++;
          break;
        case 'Ä': case 'ä': case 'Ö': case 'ö': case 'Ü': case 'ü':
          countU++;
          break;
    System.out.println( "Total amount of characters:\t" + total );
    System.out.println( "Number of consonants:\t\t" + countC );
    System.out.println( "Number of vocals:\t\t" + countV );
    System.out.println( "Number of umlauts:\t\t" + countU );
    System.out.println( "Number of spaces:\t\t" + countS );
    System.out.println( "Number of punctuation chars:\t" + countP );
}

WRE wrote:
In general Im not very happy with this huge list of cases. How would you solve a problem like this? Is there a more convenient/elegant way?I've been doing this a lot lately myself evaluating documents with 20 or so million words. Few tips:
1. Regular expressions can vastly reduce the list of cases. For example you can capture all letters from a to z or A to Z as follows [a-zA-Z]. To match a single character in a String you can then make use of the Pattern and Matcher classes, and incorporate the regular expression. e.g.
//Un-compiled code, may contain errors.
private Pattern letterPattern = Pattern.compile("[a-zA-Z]");
public int countNumberOfLettersInString(final String string) {
    int count = 0;
    Matcher letterMatcher = letterPattern.matcher(string);
    while(letterMatcher.find()) {
      count++;
    return count;
}2. As mentioned above, Sets are an excellent choice. Simply declare a static variable and instantiate it using a static initializer block. Then loop over the String to determine if the character is in the given set. e.g.
//Un-compiled code, may contain errors.
private static Set<Character> macrons = new HashSet<Character>();
static {
    macrons.add('ä');
    macrons.add('ö');
    macrons.add('ü');
public int countNumberOfMacronsInString(final String string) {
    int count = 0;
    for(char c : string.toCharArray()) {
      if(macrons.contains(c) {
        count++;
    return count;
}Mel

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