Help with setting up please

[BlitzA]

I still need some help getting the Elements package working with java.

I've typed this in command prompt:

Code:

set CLASSPATH=C:\Program Files\Java\jdk1.6.0_03\bin\element.zip

So now it let's me compile this code:

Code:

import element.*;

public class DrawRect
{
    public static void main(String args[])
    {
        DrawingWindow d = new DrawingWindow();
        Rect cornerRect = new Rect(10,10,20,30);

        d.draw(cornerRect);
    }
}

So I get a file called DrawRect.class

When I type in java DrawRect to run the code it says:

Code:

C:\Program Files\Java\jdk1.6.0_03\bin>java DrawRect

Exception in thread "main" java.lang.NoClassDefFoundError: DrawRect

Someone please help I've been trying to get this working for hours and haven't even started my project lol

[wsaryada]

The error says that it cannot found your DrawRect in the classpath. Basically adding a "." to the classpath solve the problem as you execute the class from inside the same folder. So try to update the classpath to:

Code:

set CLASSPATH=C:\Program Files\Java\jdk1.6.0_03\bin\element.zip;.

or you can define the classpath when you execute the java command with -cp or -classpath option set.

[BlitzA]

Quote:

Originally Posted by wsaryada

The error says that it cannot found your DrawRect in the classpath. Basically adding a "." to the classpath solve the problem as you execute the class from inside the same folder. So try to update the classpath to:

Code:

set CLASSPATH=C:\Program Files\Java\jdk1.6.0_03\bin\element.zip;.

or you can define the classpath when you execute the java command with -cp or -classpath option set.

Ah, excellent i'll try that when I get back from work.

What exactally does adding "." do then?

Can you explain classpath to me, I've kinda fumbled onto where i'm at now without really knowing what i'm doing.

I'm not meant to have things running from the bin folder either am I? ha.

Cheers bud.

edit: nice site in sig.

[spoon!]

Quote:

Originally Posted by BlitzA

What exactally does adding "." do then?

. = current directory

[BlitzA]

Quote:

Originally Posted by spoon!

. = current directory

Ah ok, so it's looking for my .class file DrawRect in element.zip?

And adding "." to the classpath makes it look in the right directory, as in the "bin" subdirectory.

So this must mean that my classpath needs sorting out.

How can I have it so it will use element.zip without making the classpath directly go there, which is what I was asking about the first time round basicly.

Hope you understand this.. cheers for help.. dunno if I'm being thick here or not but I just need to get my head around what's going on.

putting ;. worked, cheers

So what should I have done instead?

[wsaryada]

I am a bit confused for the above message, can you explain more clearly what you wanted to do?

[BlitzA]

Quote:

Originally Posted by wsaryada

I am a bit confused for the above message, can you explain more clearly what you wanted to do?

Apoligies for that.

What I was saying is that I now see that my classpath must be wrong, as I shouldn't be running things out of the same directory as my javac file.

Instead of putting:

Code:

set CLASSPATH=C:\Program Files\Java\jdk1.6.0_03\bin\element.zip;.

what should I have done?




Also on a side note, do you know how I can close DrawingWindow's in windows XP. At the moment I ctrl-alt-del then end task to close it.

If I'm changing code all the time this takes to long.