Wierd problem with abstract and extends

[g123456]

For some weird reason i can no longer compile things that i could compile.. in fact it was so strange that i went back to the java sun official tutorials and tried to compile an example

abstract class GraphicObject {
    int x, y;
   
    void moveTo(int newX, int newY) {
        
    }
    abstract void draw();
    abstract void resize();
}

and

class Circle extends GraphicObject {
    void draw() {
       
    }
    void resize() {
        
    }
}
class Rectangle extends GraphicObject {
    void draw() {
        
    }
    void resize() {
        
    }
}

this which is an example from a java tutorial in java official website
gives the following error :


after typing /javac GraphicObject.java

it compiles correctly ( note thats the abstract class )

after typing /javac Circle.java it says it can't find the GraphicObject class which i am trying to extend..


I don't think i have really changed my JRE or my JDK at all for 1 year now and i am almost sure that the last time i tried to compile such a thing it worked... and whats even more weird is that netbeans finds it as an error too while this tutorial is quite popular in the internet..

also let me note that the java files are all in the same folders...

[paul pasciak]

I had no difficulty compiling the classes you listed.
Here is my set-up and the procedure I followed.
(I did nothing exceptional.)

I'm using Windows XP, and Java 1.6.
I have a cmd console on the desktop, which I
click on to access java. (no Eclipse, netbeans,
or anything fancey.)

I broke up your code into three seperate files
and compiled them in this order:

javac GraphicObject.java
javac Circle.java
javac Rectangle.java

I did everything the way I would do any other
code and I had no problems.

[g123456]

i did the same and i have problems.. whats going on? javac problem?

[paul pasciak]

There is very little more that I can add,
other than the

GraphicObject.class
Circle.class
Rectangle.class

files appeared on the desktop after compiling.

[gcalvin]

My guess (and it is just a guess) is that you have a CLASSPATH, and "." representing the current directory is not in it. The default CLASSPATH is just "." which should not give the results you are seeing. Again, it's just a guess, but it may get you started in a helpful direction.

-Gary-

[g123456]

yeah could be i will just try to re-make the system variables for the java runtime enviroment


hmm i have changed the classpath recently to set up apache's ant for easier compilations maybe thats the problem

[g123456]

Wow i just fixed it by fixing a bit the classpath.. i can't believe i wasted 5 hours of my coding time to figure such a thing.... that reminded me of something "Expect the unexpected"