Help needed about thread priority

Hello, could someone help me with the priorities in java? I got 10 levels in total(1-10), but I do need at least 20 levels for my multiple threads program.
Thank you for your kind help in advance.

First, let me apologize if I am incorrect, but it seems that the native Thread implementation restricts you to 10 priorities regardless.
However, you can do just about anything you envision, but it will require some implementation on your part.
You could implement a subclass of thread that contains your priority (which could be from 1-20). You could then maintain a ThreadManager that would store all running threads, and would accept requests to start and stop threads. The ThreadManager could make decisions about which threads to run, which to interrupt, which to sleep, etc., based on your priority value.
This sounds like alot to swallow, but I'm sure it's doable if you understand threads.

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Help needed about Java Threads ?

Hi,
I have a p2p java program that contains many classes, A.java, B.java, etc. It works fine when i send or recieve to eachother one at a time, but I would like to be able to send/recieve things at the same time. So i would probably need to use Java Threads. Can somebody please show me how this is done. I would really appriciate it. Thanks!!
import java.net.*;
import java.io.*;
import java.lang.*;
public class A {
        private static String hostname; //host name
        public A () { }
       public static void send() throws IOException {
                //send code here
        public static void receive() throws IOException{
                //receive code here
        public static void main(String args[]) throws IOException {
                //do both send/recieve at the same time?
                send();
                receieve();
}

Well, I think( this is comming out my rear ) that the scope of the recieve() call is not in the main method anymore but instead in class you've created with "new Thread()" and it's throwing from the public void run() instead. This is a good example of complicated code. I would do this:
(Untested code)
import java.net.*;
import java.io.*;
import java.lang.*;
public class A implements Runnable { // <--- NEW
        private static String hostname; //host name
        public A () { }
        public static void send() throws IOException {
                //send code here
        public static void receive() throws IOException{
                //receive code here
        public static void main(String args[]) throws IOException {
                //do both send/recieve at the same time?
                new Thread( this ).start();
                send();
        /******** NEW ************/
        public void run()
            while( keepListening )
                // It's the assumption that recieve() is
                // throwing the IOException from some net calls
                try {
                   recieve();
                } catch( IOException ioe ) {
                   System.out.println( "IOException in run()\n" + ioe.getMessage();
}

Questions about thread priority...

Situation 1) setPriority(int adsa)
public class ThreadPrioDemo1 {
      static class Demo1 implements Runnable{
      public void run(){ //blablabla}
     public static void main(String[] asdf){
          Runnable r = new Demo1();
          Thread myThread = new Thread(r);
          Thread mainT = Thread.currentThread();
          //mainT's priority is 5, so as myThread.
        mainT.setPriority(10);
//mainT's priority to MAX, this simultaneously changes myThread to 10 as well.
        //or
        myThread.setPriority(10);
//myThread priority to MAX, however, this does not change mainT to 10
}Question 1), why if main Thread is set to a certain priority, the thread it creates automatically change its priority to the same as well, but the reverse is different??
Situation 2) this is slightly more complex
public class ImplementingRunnable {
     public static void main(String[] args) {
     Thread mainT = Thread.currentThread();
          for(int ii=0 ; ii<args.length ; ii++) {
               Runnable r = new MyRunnable(args[ii]);
               Thread t = new Thread(r);
            t.setDaemon(true);
            //t.setPriority(Thread.MAX_PRIORITY);
               t.start();
}and
public class MyRunnable implements Runnable {
    public void test(){
    System.out.println("test");
     String message;
     public MyRunnable(String msg) {
          message = msg;
     public void run() {
          Thread me = Thread.currentThread();
          try {
               for(int ii=0 ; ii<10 ; ii++) {
                   //case (1) me.setPriority(Thread.MIN_PRIORITY);
                    me.sleep(3);
                    System.out.println(message);
                    //case (2) me.setPriority(Thread.MIN_PRIORITY);
          } catch (InterruptedException ie) {
}In class ImplementingRunnable, how is the commented code line related or counter-related with the commented case 1 code line in MyRunnable??
Please help
thanks

Let me speak my question again very simply:
1)
Say I have two threads, 1 is main() thread, the program entry point, 2 is another thread created by main().
Now, the default priority for both two is 5. If I change the priority for main() to a certain level, the other thread created by it automatically change its priority to the same level? why? and however, the reverse (in this case, if I change the priority for the thread created by main()) is not.
2)
public class Demo{
static class MyThread implements Runnable{
public void run(){//some thing}
Thread t = new Thread(this);
t.setPriority(10);
public static void main(String[] afd){
Runnable r = new MyThread();
Thread t1 = new Thread(r);
t1.setPriority(1);
}What can you say about both bold code lines?
If I use println() to track the Priority, the final priority, that is, t1, is 1. It is logical, however, the program behaves differently without the bold code line in the static class MyThread, despite the final priority for t1, is the same, 1.
Any help by now??
thanks alot

Help needed on threads!!!

Hello All,
Following is the scenario that I'm trying to do.
Thread_A: puts the data/messages into Queue A (I'm using linked list as the data structure)
Thread_B - pulls the data/messages out from Queue A .
So far I have implemented the following
Class A implements Runnable
{   LinkedList queue A = new LinkedList ();
Thread_ A = new THread (this)
Thread_A.start();
run{
Putting the messages into QueueA;
classB.copyQueue(queueA); //this method is defined in classB
Class B implements Runnable
{   LinkedList queueB   = new LinkedList ();
Thread_ B = new THread (this)
Thread_B.start();
copyQueue(linkedList A){
queueB = A;
run{
pull the messages from QueueB;
I hope I have explanined it clearly. . Is my design approach ok so far.? somehow I don't get that feelng. THought I will consult the experts. I'm new to java. Please excuse me if this is a silly question. Please help.
Thanks.

Well, there's no reason for each class to have it's own reference to the queue, for a start. Simpler to give B a reference to the instance of class A.
You need to guard the access to the queue with synchronized and use the wait/notify methods to make threadB wait if the queue is empty.
Easiest to stick a pair of syncrhonized methods into class A like:
public synchronized void addToQueue(Object item) {
     if(queueA.isEmpty())
         notifyAll();   // if queue was empty wake the consumer thread
     queueA.add(item);
public synchronized Object takeFromQueue() throws InteruptedException {
    while queueA.isEmpty()
       wait();
    return queueA.removeFirst();
     }Thread B calls takeFormQueue to get each item, which will cause it to wait until there's somthing to take.

Form help needed- creating a PRIORITY FIELD

I cannot figure this out as i have looked all over the
internet to no avail.
I have a 30 question coldfusion flash form.
I would like the user to select their top eight questions by
having a drop menu labeled 1 thru 8 beside each question.
The priority number can only be chosen once.
Help please...

zoemayne wrote:
java:26: cannot find symbol
symbol : method add(java.lang.String)
location: class Dictionary
add(toAdd);this is in the dictionary class
generic messageThat's because there is no add(...) method in your Dictionary class: the add(...) method is in your WordList class.
To answer your next question "+how do I add things to my list then?+": Well, you need to create an instance of your WordList class and call the add(...) method on that instance.
Here's an example of instantiating an object and invoking a method on that instance:
Integer i = new Integer(6); // create an instance of Integer
System.out.println(i.toString()); // call it's toString() method and display it on the "stdout"

Help needed about Xorg.

Hi guys.
I'm became really confused about this xorg.
I would like to get my videocard working 100%
I'm about to build a Mediecenter, and got and hauppaugePVR 500 - But that's only for recording the TV ??? or is it also for wieving tv?
I have also a normal graphiccard with S-video out on. Wich one of these shold be connected to the TV. When I used the normal card - there's a lot of interference/stribes on the screen.
But is it made that you also use the Hauppauge to watch tv on?
And how do I configure xorg to handle the tv-out. I've look in other threads about this - but have not figured it out . Can someone please tell me more.

peque wrote:And how do I configure xorg to handle the tv-out. I've look in other threads about this - but have not figured it out . Can someone please tell me more.
Maybe this xorg sample helps:
http://people.os-zen.net/shadowhand/configs/xorg.conf

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I just can't work out whether I can use the ipad straight away without doing anything or whether I need to involve a mobile or landline/broadband supplier.
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a Local area network also called LAN network is what most people use in their house
it's cables you connect 1 or more computers to get Internet and access files from eachother
wifi id 100% that!
just without the cable
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you go into the settings on the ipad and choose the wifi router name on the list and type in the password
and you're able to go online
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Help needed in threads

hi,
Iam using the stop() from the API.But since it is deprecated I dont want to use it.Is there any way by which I could replace it ?I need to make changes in thousands of files.
Any sample code for avoiding stop() wud be of immense help.

Slightly at a tangent, but why
while (true) {
synchronized (mutex) {
if (running) {
//execute some task
mutex.wait(500);
} else {
break; //will break from while(true) loop
}instead of
while (running) {
//execute some task
synchronized(mutex);
mutex.wait(500);
Often VM's interpretation of what volatile means can differ from each other and it is my experience that in the past various VMs have been buggy with volatile variables. Hence to be doubly sure I want to ensure that access to the "running" variable is synchronized.
synchronized (mutex) {
while (running) {
    //execute some task
    mutex.wait(500);
}is equivalent to my code above of course and I could (should) have used this. The reason is that I did a cut-and-paste job with some hasty alterations where for various reasons I wanted to re-do a check before waiting and also cede the mutex inbetween executing the task and waiting. Apologies for any confusion.
The reason I ask is that I've never found a use for
"break".I'm not mad-keen on it either as it isn't very good practice IMHO but it was quite useful where I have used it.

Help needed about Nearline storage in BW 3.5.

Hi Guys,
Can you please provide me with some documents for implementing Nearline storage scenarios in BW 3.5.
Thanks,
Punkuj...

Hi Punkuj,
We use Nearline storage to store the data that is never been user or used very rarely.For example we have data for year 1960 in the data targets and now it is 2007.So mostly the management never uses this data or they uses them very rearly.So when we retrive the data from the data targets the DB unnecessarly reads the data every time when a report is generated on those targets.So to avoid this performance issue we store that kind of data in a seperate disk and we access that data using a multi provider when we need that in Report.This data is also known as Dormat data.
Hope this will help you.
Thanks and Regards
SandeepKumar.G

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ThanX in advance.

Your note has two problems in it: (1) Custom tag libraries of your own making, and (2) Running JSTL. I'd like to address the second of the two.
I'm not sure what you downloaded from Jakarta. I'll assume that you're using JSTL 1.0.3 standard JSTL. (That's what I'm using.) The ZIP file I downloaded has a lib directory with 10 JARs in it. You'll need to put all 10 of them into your WEB-INF/lib directory for your app to use them.
You don't have to put a <taglib> in your web.xml, and you don't need to dig out any TLD files. The TLD files you need are already inside the standard.jar that you downloaded with the JSTL. You should not be trying to re-create what is already correct.
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<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>The uri attribute value must match the value in the c.tld file located inside standard.jar exactly:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name>c</short-name>
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Help needed about regex usage.

hi all,
i am kind of new to java.util.regex, and i can't solve this problem:
i have a big string, that actually represents the text code of a method. in this method, i have an object, called, let's say "visitor" and i call several non static methods of it. i need to search this string and put into an ArrayList<String> all the occurrences of visitor, the method called, and its parameters.
if i wasn't very clear, here is an example:
the input string: "public void test_add()
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          while(visitor.moveNext())
               fillArrayList(visitor);
               Exception exception = null;
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                    exception = e;
               ExceptionValidator.validateException(visitor, exception);
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                         visitor.getResultAsCollectionData("List"), _testedArray, comparer);
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thank you all.

import java.io.*;
import java.util.regex.*;
public class TestRegexp {
public static void main(String[] argv) {
    Pattern p = Pattern.compile("visitor\\..*?\\(.*?\\)");
    try {
      BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
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        while(m.find()) {
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Hi
i m try to Install Financial 11i my stand alone PC.i m using Windows Xp with services Pack 2 & install all need software . i m getting error any one help me how can i remove that errorss.
command : cmd.exe /c F:\Uninstall Oracle Financial\Stage11i\startCD\Disk1\rapidwiz\bin\adchkutl.cmd D:\cygwin\bin D:\v98
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'F:\Uninstall' is not recognized as an internal or external command,
operable program or batch file.
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MtierInfoPanel
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'F:\Uninstall' is not recognized as an internal or external command,
operable program or batch file.
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O/S User and Group Check
command : cmd.exe /c F:\Uninstall Oracle Financial\Stage11i\startCD\Disk1\rapidwiz\bin\adchkutl.cmd D:\cygwin\bin D:\v98
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'F:\Uninstall' is not recognized as an internal or external command,
operable program or batch file.
RW-50011: Error: - System Utilities Availability test has returned an error: 1
RW-10001: Rapidinstall wizard has detected that your configuration has errors. You must resolve these issues before continuing.
Returning to wizard after Install Check Failed warning.
Thanks
Rizwan Shafiq

Do not use any directory name which contains spaces (i.e. F:\Uninstall Oracle Financial). Change the directory name to be (F:\Stage11i), clean up your previous installation and start over again.
The same thing is applicable to (VC++, MKS, Cygwin ..etc)
It should work then.

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I am confused. Hope someone can help me.
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Thanks, I really appreciate your contribution.
Must the IPsec licenses be from cisco? Can I use openVPN licenses? The design will be hub and spoke because the be5000 will seat in HQ but the operation will be a mesh operation where the branches can also call each other using VoIP.
There will be 20 SIP6941 IP Phones in HQ and 6 each in all the six branches.
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regards

Help needed about PDF - java

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Myriam.

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Myriam

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Help needed about thread priority

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