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hi i trying to write code of capturing image through web cam using java lang. plz. help me.....
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Hi all,
i want to write a java script which will remove duplicates in html page.
scenario:- i am having html page that can be acessed by all my team members when ever they want to write some thing new they will just write in webpage directly in webbrowser and they will click the submit button.
i want to write a java script such that whenever they click on that submit button it should show a warning message and then delete if the data that is newly added already exists.
Thanks in advance.
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You are in the wrong forum.
What you want is complicated. JavaScript cannot access your server database, so it cannot decide if "data already exists".
Do you even have a server database? Or was your idea that every user is actually modifying the web page that serves as the input form?
Ideally, you have some sort of web server that allows updates to a database and sends dynamic web pages out to users. If you don't know what I am talking about, stop here and get a web developer into your office.
Now, you have two choices: submit the form to the web server and have JavaScript check the response message in an OnLoad event handler, OR use AJAX to do the same thing without refreshing the page.
The second option is much nicer looking, but a little more complex.
Again, if you don't know what I am saying, you need a person sitting in your office who does. You will not be able to do this yourself without a LOT of research.
Don't let my name fool you. That's my job.
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I can't find the nullpointer error I'm having with netbeans and it's getting to me, any help would be appreciated. Below is my code of a class that will evaluate a RPN expression given in prefix form. I included one of the methods. they all look the same except either it has .minus .plus .times. The stack declared, can only hold Object types which is why the casting was neccessary. I know a little bit about Generics but I can't use them. I really, would appreciate any help. Thanks in advance hopefully.
public class PrefixEvaluator
{
private final int MAX_SIZE = 60;
private BufferedReader stdin;
private Stack evaluate = new Stack(MAX_SIZE);
private boolean valid = true;
private Object answer1 = new Object();
void run() throws IOException
{
String toEval = stdin.readLine();
while( toEval != null && valid )
{
Object op1 = new Object();
Object op2 = new Object();
int eqns = 1;
System.out.println( "Raw Expression " + eqns + " is: " + toEval );
ReverseTokenizer equation = new ReverseTokenizer( toEval, " ");
String token = equation.nextToken();
if( token.charAt(0) == '(')
{
evaluate.push( token );
}
else if ( token.charAt(0) == '+' ||
token.charAt(0) == '*' ||
token.charAt(0) == '-' )
{
if( evaluate.isEmpty() )
System.out.println( "Invalid Expression" );
else
{
op2 = evaluate.pop();
op1 = evaluate.pop();
if( token.equals("+"))
addition(op1, op2);
else if( token.equals("-"))
subtract(op1, op2);
else if( token.equals("*"))
multiply(op1, op2);
else
System.out.println( "Invalid Expression" );
}
eqns++;
}
toEval = stdin.readLine();
}
answer1 = evaluate.pop();
}
public void addition( Object op1, Object op2)
{
Fraction operand1 = new Fraction();
Fraction operand2 = new Fraction();
Fraction addAns = new Fraction();
Object answer = new Object();
operand1 = (Fraction)op1;
operand2 = (Fraction)op2;
addAns = operand1.plus(operand2);
answer = (Object)addAns;
evaluate.push(answer);
}
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are you trying to tell me you see that somewhere in my code? am i just browsing over it or something?
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I gave you the reason why it's doing it!
It's up to you to debug it line by line and seeing where you get the error, now that you know what the problem is.
hmmm pie
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I don't see it having to do anything with an array. But it does look like I needed the line
stdin = new( BufferedReader( new InputStreamReader(System.in) );
Thanks anywho
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My question is simple, I want to search a string in an array and it must not be case sensitive.
private static String arraySearch (String[] myArray)
{
Arrays.sort(myArray,String.CASE_INSENSITIVE_ORDER);
String name="";
int index = Arrays.binarySearch(myArray, "java");
name = "Found Java at: " + index;
return name;
}
Above is just a procedure, the array list is stated in main method. How can I search a word that ignore case sensitive whether its lower or upper case?
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private int arraySearch(String[] haystack, String needle)
{
int index = -1;
boolean run_i = true;
for (int i = 0; i < haystack.length && run_i; i++)
{
if(haystack[i].trim().toLowerCase().equals(needle.trim().toLowerCase()))
{
index = i;
run_i = false;
}
}
return index;
}
ps. I wrote this on the fly so it may have errors but it is the general idea.
hmmm pie
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BLuetooth Door Lock - My project title, which means the embedded system operate to open the door lock when it received a correct password from the mobile via bluetooth...The embedded desgn in C programming languange and the mobile used Java(J2ME) to program...
The Concept - The embedded dsgn located near the door will send a electrical signal to the magnet at the door when it received a correct password from the mobile via bluetooth...The embedded board will be add a BT module (bluetooth to serial converter) to received a bluetooth signal from the mobile...Since the Java API support a protocol which can change the data through the serial port (RFCOMM protocol) so the embedded side can be program regularly with C programming...In the wireless side it provide SPP(Serial Port Profile), so any device compliant with this profile can exchange data through RFCOMM protocol...In Mobile side, J2ME will be a program to be write in this mobile..It need to include a password function that can send to the embedded side, which the embedded will check whether the password is authenticated to open the door...
-Any wrong method in this concept?..or other method need to be add?
-Is it possible to do it?
-Is it I need to use OBEX protocol?
-Any essential code that i can refer?
legand
modified on Friday, March 13, 2009 7:07 PM
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legand.
are u already start wit this project?
i really need your help to learn how to make this system.
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Hi,
I want to encrypt the file from unix then decrypt encrypted file in windows.
My problem is i have successfully encrypt the file in unix using java Base32 class.
But i try to decrypt the encrypted file in windows using java coding when Padding problem occured
Thanks
Murugan
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There ain't a lot to go on here Bubba. You'll have to throw in a few more fish before ya catch anything here.
[Hint: c-o-d-e]
Panic, Chaos, Destruction.
My work here is done.
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I succeeded in sending & receiving SMS (with J2ME) on ports other than default.
I just want to know that is it possible to use Port 0 (default port) instead of using any other?
Since i want incoming sms should be read by my application & also that sms in Inbox.
Thanks.
NNN
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Hello!
I have to do the RGB cube in Java. It is have to be something like that :
http://www.codeproject.com/KB/miscctrl/CPicker/RGB_Space.jpg[^].
Does anyone of you could help me (do not ask you to code of course ) even a pseudo-algorithm? The cube has to be painted pixel after pixel propably. For Any assistance would be extremely grateful.
Regards,
Adam
PS. Sorry for my English.
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Hi,
I am running a form , when i click a button in the form a dll is called in which another form is appeared, now total two forms are running. In the task manager processes, i can see only the name of the first form. So i cannot able to find and kill the second from code using 'process.Kill'.
How can i able to find and kill the dll running from main form?
Thankyou,
YP
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0) Killing is not ideal. We use that only for VB programmers and/or puppy haters.
1) You cannot see running dll's in the task manager, they're libraries that are linked to dynamically by executables.
2) You're loading the froging thing from your main form! Keep hold of the reference then you can release it cleanly later.
Panic, Chaos, Destruction.
My work here is done.
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This is the etiquette:
- Post question.
- Wait for answer.
Go off and do some work and maybe later:
- Post question.
- Wait for answer.
Do not flood the forum with one liners that don't actual contain anything that can be resolved.
Panic, Chaos, Destruction.
My work here is done.
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Please show an example, my brain hurts when I try to read invisible code.
Panic, Chaos, Destruction.
My work here is done.
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We had made a JFrame in NetBeans with placing a JTabbedPane in it. There are six tabs with many swing components in it.
Net Beans generated the code automatically in "JFrameClass.java"
That made one class. We changed the components access specifier to public.
Now We made a new class "SetTabPane" extending "JFrameClass.java" using JTabbedPane of class JFrameClass. While running the program it gives an error "java.lang.NullPointerException" on the line accessing the object of JTabbedPane.
Can you help us ???
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No code, no help.
Go help yourself. If you're using Netbeans you can run in debug and find the /bad/ code.
Panic, Chaos, Destruction.
My work here is done.
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I have two Class,two Object,
Example:
Object1 hava 2 fields
mid,imageurl
Object2 hava 3 fields
nid,title,date
how can I receive these object to a XML,and without the id
the root element is <root>,these fields is element
give me a method
thank you.
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