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SOLVED my problem. The whole time I gave the program Bike 5 path insted of Bike5.jpg. Didn`t realize that extensions must be added! Sorry for wasting your time and thanks for help! :D

I know, I read that in Java tutorial NullPointerException - If the pathname argument is null. I would like to know if I need to put the pictures in a specific folder or add then to my project (tried...

When I print it on console path is Bike 5.

When I try your code it always throws java.lang.NullPointerException. I think that is becase it never creates new File. I changed IF statement so that it...

OK, thanks for your answer. Tried that but it still won`t load the picture. Can you please tell me in which folder should I put the pictures? package folder or something else?

edit: Could there be...

Hello,
I am trying to create a JComboBox that would change pictures. My problem is that my method always returns null and it doesn`t return my image which is located in my package. Now I would like...

I read all about creating and working with jar files and now everything works. Thank you guys for wasting your time on my problem :D

Thank you for your replies. I will read the tutorial later today and try java console.

Well that is going to be a problem because I can not copy anything from that window. In chrome when I launch web page only that window pop- up and if I press Details it opens Java consoe. If I press...

do you mean something like this:
<applet code = "com/PracticalJava/Lesson10/Calculator" width=300 height=250 />

I tried that and I got error: ClassNotFoundException

I made a simple program so...

Removing .class didn`t help.

when I launch .html file chrome should display my calculator (eclipse displays it as an applet). I attached screen shoot. hope that helps.1301

Hello,
I have a problem when I try to implement java applet to a web page. Web page keeps saying :
NoClassDefFoundError. Can anyone help me with this?

here is a html code:


<header>
...

THANK YOU,VERY MUCH!! :D that really helped.


(mathOperator.equals("-"))

this line is what was bothering me and now I know how to check if string is equal to something. :cool:

Hello,
can someone help me with this code (it is a calculator with ActionListener):



else if (src == referenca.buttonPlus)//when someone press button +
{
...

I thought I did. Isn`t this what you are talking about


Calculator referenca;

CalculatorEngine (Calculator referenca)
{
this.referenca=referenca;
}

Thanks for your answer, and I figured out where is the problem. It`s in this line
String displayText = referenca.getDisplay(); I think it means that I can not reach method(or function, do not know...

Hello,
I am a total begginer in JAVA and I could use your help. I am reading a book " Java Programming 24-Hour Trainer by Yakov Fain
" and I have a problem with creating a calculator.

here is my...