isAlive()

if its takes a few seconds, I assume you are using a Thread for that process. Or are you just leaving it to normal program flow??

If its the former, there are useful built-in methods to prevent...

you did not understand?

It gives a good example.

I think the first perfect integer is 6 because positive proper divisors are 1 2 3 and 1+2+3 = 6.

12 is not perfect cause 1+2+3+4+6 = 16 > 12...

sorry I found my answer.

Desktop.open(File) does this task perfect.

Isnt there a way like java Desktop API, it can browse with default browser, cant it open a directory?

I think when button clicked, a long process is started in your application and you dont want to get any clicks until it is finished?

Why dont you disable the button as soon as it clicked and...

Related to posting thread, have you heard about CODE TAGS?
Also can you please write a few sentences telling what you need and what you are trying to do.

Related to your problem, have you heard...

Use JLayeredPane. ...

public class Server {
public static void main(String[] args) throws IOException {
ServerSocket serverSocket = null;
boolean listening = true;
// start the stdinReader...

Your approach is right. On server side, before starting the server-client mechanism, first start your stdInReaderThread. Its up to you what to do when you get "q". You can just close the server....

with

join();


if you keep all the threads you created in an array,vector...
then you can call join() on all threads to kill them all...Of course, this will cause all threads to be done.
...

As the previous poster said, use a boolean for first click, also increment your counter in mousePressed. If you increment it in paintComonent, counter will be incremented everytime the frame is...

................

private Socket client;
private BufferedInputStream input;
private PrintWriter output;
byte[] buffer = new byte[4096];

...............

client = new...

I dont know what the problem is, but instead dataInputStream and dataOutputStream, you can try BufferedInputStream and PrintWriter which I always use in socket programming in java. And a byte[4096]...

ok,now I see it,
thanks...

What exactly does this mean?

I understand what you want to tell. Waiting a valid input file may be a good choice.
But, if I don't want to give that right to the user, I mean user has to enter a valid filename at his first...

As far as I know, exceptions that are not subclasses of runtime exception or error should be caught (handled).

When a file exception occurs, it should be caught because its a subclass of exception...

it seems interesting...does it require to include any third party header files?

What I mean was using new and delete.
anyway, I learned the solution:local pointers should be handled before going out of scope.
:)

Hi,
assuming that Element is a class,I prefer to create an array of objects size of which is unknown in this way:
Element *elementArray = new Element[length];

Is there another way to create an...

you already have a dequeue function
why not use such a loop

while(!isempty())
{
dequeue();
}

thank you very much,I will try Jlabels...

now,I found the problem,its not about the overriden method!

now there is something new,
You suggested me to use Jlabels ,but I used drawRectangle to draw nodes.Can these nodes(shapes) be...

Is there any way for panel to draw without overriding paintComponent method?Can I put my method just in Jpanel and then call it?

no,of course I put my drawing function in paintComponent! but it doesnt show anything!

As far as I see,there is no probelm with Jpanel or Jframe,maybe my drawing method in overriden paintComponent...

I have created a JFrame frame and a Jpanel panel,
then I added the panel to frame.

I have overriden paintComponent method in my panel.
Now,do I have to call paintComponent method on Jpanel...

thanks

I want to draw a tree in Jframe, the tree view is available in the attachment,

As you see there are nodes connecting to each other.I know that I have to find the midpoint of the nodes at the same...

thanks...

thanks,this approach seems simpler than class hierarchy equivalent of union in C.

a generalized list structure can be declared in C as follows:

typedef struct element{
bool sign;
union{
char data;
element* link;
};
...

oh,I found where I was wrong

these member functions cant be const ,right?

ifstream& FileHandler::getFileIn(){
return fileIn;
}

ofstream& FileHandler::getFileOut()
{

.
.
private:
string fileName;
ifstream fileIn;
ofstream fileOut;
.
.

ifstream& FileHandler::getFileIn()const{

no,as you see its not local varable,its class member,how can I do that?

class FileHandler
{
public:
FileHandler(const string &);
~FileHandler();
string getFileName()const;
void setFileName(const string &);
ifstream& getFileIn()const;
ofstream&...

and sorry but this gives error too

ifstream& FileHandler::getFileIn()const{
return fileIn;
}


compile error:
invalid initialization of reference of type 'std::ofstream&' from expression of...

yeah I tried it and it gives no compiling error

but when I want use it in such a loop


string line;
while(getline(pFileHandlerObj->getFileIn(),line)){
}

#ifndef FILEHANDLER_H_
#define FILEHANDLER_H_

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

class FileHandler

I want to do somthing like this.

ifstream My_File::GetFile_Stream() const
{
return(this->Input_Stream);
}

where Input_Stream is a private member of the class My_File and is declared as...