classpath error

[giantfatiguana]

hey all im a beginner java user and am getting an error relating to the classpath i assume.

I have a file JM550b.java which is trying to access the class QTCycle when compiling. QTCycle.java creates a package called jmqt "package jmqt;" and the class is placed in that folder.

QTCycle.java compiles successfuly but when i try to compile JM550b.java i get an error saying "cannot access QTCycle" on the line "private static QTCycle player;"

It also says

"cannot access QTCycle
bad class file: C:\Documents and Settings\Rachael\Desktop\Dom\Tutorial\jmqt\QTCycle .class
class file contains wrong class: jmqt.QTCycle
Please remove or make sure it appears in the correct subdirectory of the classpath.
private static QTCycle player;"

My directory is like this: (im sure this is where the problems arise please help me im struggling with this!)
Desktop\Dom\Tutorial\src - this is where the main .java files of my project are kept as there a few classes the main program will access.
Desktop\Dom\Tutorial\jmqt - this is where the QTCycle class goes when it is compiled

Im not sure what more i need to say but if anyone can help i will be glad to give all info i can.

Please help!

[r035198x]

Your first error is caused by trying to access a private field from nother class. That's not allowed.

[giantfatiguana]

Your first error is caused by trying to access a private field from nother class. That's not allowed.

But i have other lines similar such as "private static Button start, stop;"
and "private static EightBeat1 pat;"

These two work fine.

Thank you for reply :)

[r035198x]

I see now that I did not understand your initial statements, sorry.
It should be a directory structure problem. Your jmqt folder must be in the src folder.

[JosAH]

This is where your class is stored:

Settings\Rachael\Desktop\Dom\Tutorial\jmqt\QTCycle .class

The class seems to be in the package 'jmqt', can you show us the classpath
you used?

kind regards,

Jos

[giantfatiguana]

This is where your class is stored:

Settings\Rachael\Desktop\Dom\Tutorial\jmqt\QTCycle .class

The class seems to be in the package 'jmqt', can you show us the classpath
you used?

kind regards,

Jos

by classpath do you mean under project settings? im using jcreator

would this seem right?

C:\Documents and Settings\Rachael\Desktop\Dom\Tutorial;C:\jmusic\jm usic.jar;C:\WINDOWS\system32\QTJava.zip;C:\Documen ts and Settings\Rachael\Desktop\Dom\Tutorial\jmqt;C:\Docu ments and Settings\Rachael\Desktop\Dom\Tutorial\QTCycle;C:\P rogram Files\Java\jdk1.6.0_06\jre\lib\rt.jar;C:\Program Files\Java\jdk1.6.0_06\lib\dt.jar;C:\Program Files\Java\jdk1.6.0_06\lib\tools.jar;C:\Program Files\Java\jdk1.6.0_06\jre\lib\ext\dnsns.jar;C:\Pr ogram Files\Java\jdk1.6.0_06\jre\lib\ext\localedata.jar; C:\Program Files\Java\jdk1.6.0_06\jre\lib\ext\sunjce_provider .jar;C:\Program Files\Java\jdk1.6.0_06\jre\lib\ext\sunmscapi.jar;C :\Program Files\Java\jdk1.6.0_06\jre\lib\ext\sunpkcs11.jar

[JosAH]

by classpath do you mean under project settings? im using jcreator

would this seem right?

C:\Documents and Settings\Rachael\Desktop\Dom\Tutorial;C:\jmusic\jm usic.jar;C:\WINDOWS\system32\QTJava.zip;C:\Documents and Settings\Rachael\Desktop\Dom\Tutorial\jmqt;C:\Docu ments and Settings\Rachael\Desktop\Dom\Tutorial\QTCycle;C:\Program Files\Java\jdk1.6.0_06\jre\lib\rt.jar;C:\Program Files\Java\jdk1.6.0_06\lib\dt.jar;C:\Program Files\Java\jdk1.6.0_06\lib\tools.jar;C:\Program Files\Java\jdk1.6.0_06\jre\lib\ext\dnsns.jar;C:\Pr ogram Files\Java\jdk1.6.0_06\jre\lib\ext\localedata.jar; C:\Program Files\Java\jdk1.6.0_06\jre\lib\ext\sunjce_provider .jar;C:\Program Files\Java\jdk1.6.0_06\jre\lib\ext\sunmscapi.jar;C :\Program Files\Java\jdk1.6.0_06\jre\lib\ext\sunpkcs11.jar

I boldfaced the suspicious classpath elements; there's more trash in there: those
paths leading to the private jre (that comes with the jdk) shouldn't be there,
neither anything in the jre's ext directories should be there. If I were you I'd clean
that mess up a bit, remove and recompile that class and try again.

kind regards,

Jos

[giantfatiguana]

I boldfaced the suspicious classpath elements; there's more trash in there: those
paths leading to the private jre (that comes with the jdk) shouldn't be there,
neither anything in the jre's ext directories should be there. If I were you I'd clean
that mess up a bit, remove and recompile that class and try again.

kind regards,

Jos

im sorry i misunderstood you, do you mean to remove the C:\Program Files\Java\jdk1.6.0_06\jre\lib\rt.jar; and any others under \jre ?

[JosAH]

im sorry i misunderstood you, do you mean to remove the C:\Program Files\Java\jdk1.6.0_06\jre\lib\rt.jar; and any others under \jre ?

The JDK comes with its own private JRE and on top of that it comes with a public
JRE. The first JRE is none of our business, i.e. it is used by the development
tools such as javac, jar etc. Have a look in your C:\Program Files\Java directory:
you'll find a JDK directory and a JRE directory; that JRE directory is the public
JRE; that private JRE is a subdirectory of the JDK directory. There is no need
to have a classpath component point to any JRE directory at all. Your classpath
however is full of it; get rid of them, they're useless.

kind regards,

Jos

[giantfatiguana]

The JDK comes with its own private JRE and on top of that it comes with a public
JRE. The first JRE is none of our business, i.e. it is used by the development
tools such as javac, jar etc. Have a look in your C:\Program Files\Java directory:
you'll find a JDK directory and a JRE directory; that JRE directory is the public
JRE; that private JRE is a subdirectory of the JDK directory. There is no need
to have a classpath component point to any JRE directory at all. Your classpath
however is full of it; get rid of them, they're useless.

kind regards,

Jos

Okay thank you very much for you help and sorry to bother you with what was probably a trivial question. I got so frustrated that i just removed QTCycle completely and have managed to function without it.

Thanks again!

[JosAH]

Okay thank you very much for you help and sorry to bother you with what was probably a trivial question. I got so frustrated that i just removed QTCycle completely and have managed to function without it.

Thanks again!

That's the old Roman way of curing someone: amputation. You have basically
'unsolved' your problem which basically was a classpath problem. Better clean
up that classpath list before you're going to use packages again because that
problem will surely rear its ugly head again in the near future.

kind regards,

Jos