My code has a problem ;)

**einar123** · August 5th, 2013, 11:29 AM

package tilraunir;
import java.applet.Applet;
import java.awt.*;

public class Klukka extends Applet
{
/**
*
*/
private static final long serialVersionUID = 1L;
TextField t1, tSvar;
Button bReikna;
Label a1;
Integer I;
int i, sek, min;

public void init()
{
t1 = new TextField (5);
tSvar = new TextField (25);
bReikna = new Button ("Reikna mínútur");//Calculate minutes
a1 = new Label ("Sekúndur");

this.add(a1);
this.add(t1);
this.add(bReikna);
this.add(tSvar);
}

public boolean action(Event e, Object o)
{
if (e.target == bReikna)
{
I = new Integer(t1.getText());
i = I.intValue();
min = i / 60;
sek = i % 60;
tSvar.setText(i + " sek. er " + min + " mín. og " + sek + " sek.");
return true;
}
return false;
}
}

**KevinWorkman** · August 5th, 2013, 11:36 AM

When posting code, please use the highlight tags to preserve formatting.

What seems to be the problem with this code? Does it compile? Does it run? Does it display a runtime error? Some strange behavior? Something else?

See the link in my signature on asking questions the smart way, and we'll go from there.

**ChainDev** · August 5th, 2013, 12:05 PM

1. Why do you compile with an online compiler? When eclipse does it when you run?
2. Here is your answer. Java is CaSe SeNsItIvE with file names.

In here :

public class Klukka extends Applet //Klukka means a clock in English

change it to :

public class Klukka extends Applet //Klukka means a clock in English

What did i do? Small "k" letter

Edit :/ If your filename is

Klukka.java

change it to

klukka.java

**KevinWorkman** · August 5th, 2013, 12:17 PM

Standard naming conventions dictate that class names should start with a capital letter. The filename of the public class needs to be the same as the class itself, in this case Klukka.java.

**ChainDev** · August 5th, 2013, 12:33 PM

Originally Posted by KevinWorkman

Standard naming conventions dictate that class names should start with a capital letter. The filename of the public class needs to be the same as the class itself, in this case Klukka.java.

Actually the same answer what i typed.
Two options ;
1. Change file name (your java file)

Klukka.java

to

klukka.java

OR
2. Change what's inside the java file.

public class Klukka extends Applet //Klukka means a clock in English

to

public class klukka extends Applet //Klukka means a clock in English

**KevinWorkman** · August 5th, 2013, 12:47 PM

Originally Posted by ChainDev

Actually the same answer what i typed.

I am aware that you gave two options. Unfortunately, only one of them was what the OP should actually do. Renaming the class in the code to klukka with a lowercase k might fix the problem, but it establishes a pretty bad habit of violating the standard naming conventions. I was correcting you, not disagreeing with you.

**einar123** · August 5th, 2013, 12:48 PM

Hahah-WOW!
THANKS!
I'll use the next 24 hours to process the replies

And try to feed the children and doing some housework

KevinWorkman I don't see the link in your signature-My it knowledge...I'm just not there yet

**ChainDev** · August 5th, 2013, 12:56 PM

Originally Posted by KevinWorkman

I am aware that you gave two options. Unfortunately, only one of them was what the OP should actually do. Renaming the class in the code to klukka with a lowercase k might fix the problem, but it establishes a pretty bad habit of violating the standard naming conventions. I was correcting you, not disagreeing with you.

Haha, okay

I understand you. But i didn't know about that "bad habit" thing

Originally Posted by einar123

Hahah-WOW!
THANKS!
I'll use the next 24 hours to process the replies

And try to feed the children and doing some housework

KevinWorkman I don't see the link in your signature-My it knowledge...I'm just not there yet

& No problem (:

& If you don't see his/her Signature, check this page :

http://www.javaprogrammingforums.com...inworkman.html
and click "About me", there is his/her signature.

& KevinWorkman, is your signature supposed to be shown on posts?
As we can't see it.

**KevinWorkman** · August 5th, 2013, 01:01 PM

Hmm I can see signatures. Are you guys on mobile or something? Oh well, no big deal.

And the standard naming conventions should definitely be followed: Code Conventions for the Java Programming Language

**ChainDev** · August 5th, 2013, 01:16 PM

Originally Posted by KevinWorkman

Hmm I can see signatures. Are you guys on mobile or something? Oh well, no big deal.

And the standard naming conventions should definitely be followed: Code Conventions for the Java Programming Language

Using Google Chrome on a PC.
& Thanks for info (:

**einar123** · August 5th, 2013, 03:48 PM

Hey you! Masters of Javacode

There is something wrong with my boolean

When I compile it I get this: java.lang.NullPointerException
The compiler points out that there is somthing about a1 in init-line 23

Can you see what it is?

Should I use something different from:

I = new Integer(t1.getText());
i = I.intValue();

--- Update ---

I've got it. It works now-Thanks for your help.

How do I keep the syntax in order. I copy paste the code and it seems fine until i enter save then the indexing just disapears?

Again Thanks-It's fun

**jps** · August 5th, 2013, 03:52 PM

Originally Posted by einar123

How do I keep the syntax in order

Code tags are discussed on the Announcements page in section 1

Thread: My code has a problem ;)

LinkBack

Thread Tools

Display

My code has a problem ;)

Related threads:

Re: My code has a problem ;)

The Following User Says Thank You to KevinWorkman For This Useful Post:

Re: My code has a problem ;)

The Following User Says Thank You to ChainDev For This Useful Post:

Re: My code has a problem ;)

Re: My code has a problem ;)

The Following User Says Thank You to ChainDev For This Useful Post:

Re: My code has a problem ;)

Re: My code has a problem ;)

Re: My code has a problem ;)

The Following User Says Thank You to ChainDev For This Useful Post:

Re: My code has a problem ;)

The Following User Says Thank You to KevinWorkman For This Useful Post:

Re: My code has a problem ;)

The Following User Says Thank You to ChainDev For This Useful Post:

Re: My code has a problem ;)

Re: My code has a problem ;)

Similar Threads

Problem with code.

what's problem with this code?

I am in problem with my code

problem in my code java code graph editeur

problem in my code