Java

8-May-09 22:17

That's an awesome tip Jimmanuel thanks Smile | :)

fly9048-May-09 10:38

8-May-09 10:38

What I normally do is to override the default paint method in the Canvas class.

Have a look at this[^]. The SweepCanvas class is the basic principle, just remove the threading obviously.

My failometer is detecting vast quantities of FAIL!

"Its SQL - hardly programming..." (Caslen)

rareseu8-May-09 22:38

8-May-09 22:38

[quote]What I normally do is to override the default paint method in the Canvas class.

Have a look at this[^]. The SweepCanvas class is the basic principle, just remove the threading obviously. [/quote]

good tip Smile | :)

thank you, what i don't understand is where the run method gets invoked ( and as a consequence the repaint method), If anyone could explain this i think i could get the hang of how this class works. I see that the trick to making this work is calling the paint method using repaint() which saves you from making a Graphics instance( not the most obvious solution but i cant afford to be picky right now).

fly9048-May-09 23:06

8-May-09 23:06

I'm not great at explaining things, but have a look at this[^] and this[^].

My failometer is detecting vast quantities of FAIL!

"Its SQL - hardly programming..." (Caslen)

rareseu8-May-09 23:12

8-May-09 23:12

Aaah i see now , but if i don't implement the class with threading(which i'm trying to avoid just because it would add more complexity ), what would be a good mechanism to call the repaint method ?
btw thanks for your patience, and sorry for all the noobie questions but my deadline is closing in fast and i haven't even gone into the difficult part of the project

fly9048-May-09 23:27

8-May-09 23:27

If you don't want to use threading then simple use canasVariableName.repaint();. I think that's what you mean but I'm not sure.

If you do want to use threading then this method is the simplest way.

My failometer is detecting vast quantities of FAIL!

"Its SQL - hardly programming..." (Caslen)

rareseu8-May-09 23:28

8-May-09 23:28

Thank you soo much, you're a life saver Big Grin | :-D

need help

ahmedbhatti8-May-09 9:30

ahmedbhatti

8-May-09 9:30

any body have code for berlekamp massey algoithm in java

Re: need help

fly9048-May-09 10:08

Re: comparing images in java

8-May-09 10:08

You had an answer to the same question yesterday. If you want it in java then I suggest you rewrite the C# code into java rather than being lazy and asking for someone else to do it.

My failometer is detecting vast quantities of FAIL!

"Its SQL - hardly programming..." (Caslen)

comparing images in java

nicks112858-May-09 2:44

nicks11285

8-May-09 2:44

hey guys..i m building a motion detector in java....the problem is this, i have two bufferedimages from webcam...these are consecutive images taken from webcam...i need to compare these two images to check for any changes....i have no idean how to do this...i m trying getRGB() method for this purpose but i think i m not correctly applying it....
so if anyone have any idea how to do this..plzz reply...

Tyler458-May-09 5:04

Tyler45

8-May-09 5:04

It can be idea below:

convert both images to Base64 String and compare them

label in java

9002code7-May-09 20:53

9002code

7-May-09 20:53

class jumping{
public static void main(String[] args){
int b,c;
float a;
b = 8;
c = 2;
test:
{
a = b/c;
System.out.println("a first is "+a);
while(a<=10){
b++;
System.out.println("b in continue is "+b);
if (b==12)
{
break test;
}
System.out.println("a final is "+a);
continue test;
}
}
}
}

i need final value of a is 6. but i can't?
can you solve this?
there are error in "continue test" statements, it give not a label?
i need there code jump to label test like goto in C++?

Kindly help me????

rareseu7-May-09 21:07

7-May-09 21:07

why not just make test into a function or method and invoke it, im not sure what your code is supossed to do, but if it's supossed to continue executing untill b is 12, i've written an example :

class jumping{
  public static void main(String[] args){
    int b,c;
    float a;
    b = 8;
    c = 2;
    test(a,b,c);
  }//main
  
  public void test(float a, int b, int c)
  {
   for( ; ; ){
     a = b/c;
     System.out.println("a first is "+a);
     while(a&lt;=10){
     b++;
     System.out.println("b in continue is "+b);
     if (b==12)
     {
       System.out.println("a final is "+a);
       return;
      }
     
    }//while
   }//for

 }//test

}//jumping

ps : ident your code, it's very difficult to read otherwise, and use the code block
ps2 : someone should disbale smileys in the code block

9002code7-May-09 21:29

9002code

7-May-09 21:29

class jumping
{
public static void main(String[] args)
{
int b,c;
float a;
b=8;
c=2;
test:
{

a=b/c;
System.out.println("a first is" +a);
while(a<=10)
{
b++;
System.out.println("b in continue is " +b);
if(b==12)
{
break test;
}
System.out.println("a final is" +a);
continue test;
}

}
}
}

i want if b not equal to 12 then "a final is" is print. and b increase and also a is but it not?

"kindly help me in java for using label/jump like goto in c++"

rareseu7-May-09 21:32

7-May-09 21:32

[quote]i want if b not equal to 12 then "a final is" is print. and b increase and also a is but it not?[/quote]

have you tried my code ? that's basically what it does

9002code7-May-09 21:43

9002code

7-May-09 21:43

thanks. that is ok..

but it's not good solution for my problem.
ok, i tell all thinks....
i develop a math program where a loop run apporoximat 800000 time and finaly value is came. in c++ there are goto statements and control jump to backword or forwared where we need. like that i need jump my code if my condition false and if true the loop exit.. so i can't use function.

and it's a reason i send my code like that...

so if u do please help me..

Re: help in coding aprogram

Nagy Vilmos7-May-09 22:30

Nagy Vilmos

7-May-09 22:30

The goto statement is bad. When ever you call goto in a program a bunny will stub its toe. You can't be nasty to a fluffy bunny's toe can you?

Loose the goto and learn to love and embrace methods and loops.#

Panic, Chaos, Destruction.
My work here is done.

help in coding aprogram

harshad bhatia6-May-09 22:01

harshad bhatia

6-May-09 22:01

Write a method for calculating
n
C
r
!
, based on calculating each of the factorials (using
an iterative method that does so) and combining the results appropriately

can some one help me...

Nagy Vilmos6-May-09 22:05

Nagy Vilmos

6-May-09 22:05

harshad bhatia wrote:
Write a method for calculating
n
C
r
!
, based on calculating each of the factorials (using
an iterative method that does so) and combining the results appropriately

can some one help me...

Start off by taking your medication, put on your glasses and then read what you have written. What is there in the above that anyone can possibly help you with?

Try something and when you have a problem with your homework ask a sensible question that will elicit help.

No one is going to do your homework.

Panic, Chaos, Destruction.
My work here is done.

Welcome in the CP's memorable quotes list

CPallini8-May-09 11:12

CPallini

8-May-09 11:12

Welcome, williamnw.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

yogesh_softworld1236-May-09 15:11

yogesh_softworld123

6-May-09 15:11

Hi...

I have to call a csharp function in Java.
Can somebody give me a small example of how to do this.
Please do help me out.

yogesh

Re: hi

fly9046-May-09 23:04

6-May-09 23:04

Do you have a scroll wheel on your mouse?

Scroll down two topics. (hint[^])

My failometer is detecting vast quantities of FAIL!

"Its SQL - hardly programming..." (Caslen)

Re: hi

EliottA8-May-09 5:58

EliottA

8-May-09 5:58

Same post in like 3 forums in 1 day. Nice.

Check out the CodeProject forum Guidelines[^]

tcp server applet

rareseu6-May-09 7:23

6-May-09 7:23

Hy guys ! i'm having a problem getting my tcp server applet on it's feet, the problem is that it doesn't get past instantiating a socket, if i instatiate it with port nr 80 it throws an exception ( Address already in use: JVM_Bind ), with other ports it just locks up at the "binding port" part

        ServerSocket server;
        int port= Integer.parseInt(portNumber.getText());//port number's a text field
        status.setText("Starting server..\n");//status is a text area

        try {
            status.append("Binding to port " + port + ", please wait  ...\n");
            server = new ServerSocket(port);
        } catch (IOException ioe) {
            status.append("EROARE la creearea socketului\nEXCEPTIE:
"+ioe.getMessage()+"\n");
            return;
        }

does anybody have a clue why this happens?

Re: tcp server applet

rareseu6-May-09 10:02