Still having problems with Java . . .

[Ash]

Hey. I've uninstalled netbeans, and installed just the SDK 1.4.2. I can
compile .java files from the command prompt, but EVERY time I try to run
ANY .class file, I get:

Exception in thread "main" java.lang.NoCla ssDefFoundError : Test/java

What am I doing wring, here?

[Raymond DeCampo]

Re: Still having problems with Java . . .

Ash wrote:[color=blue]
> Hey. I've uninstalled netbeans, and installed just the SDK 1.4.2. I can
> compile .java files from the command prompt, but EVERY time I try to run
> ANY .class file, I get:
>
> Exception in thread "main" java.lang.NoCla ssDefFoundError : Test/java
>
> What am I doing wring, here?[/color]

Ash,

To run a java class file, you pass the fully qualified name of the class
to the java executable. The FQN is not the name of any file on your
file system. It is the name of the package your class is in followed by
the (short) name of your class.

For example, when I was testing your TestFrame class you posted, I did
the following:


[tmp]$ cat >TestFrame.ja va
import java.awt.*;
public class TestFrame
{
public static void main(String[] args)
{
Frame f = new Frame();
f.reshape(10,10 ,200,200);

Button b = new Button("Hello Cyberspace");
b.setBackground (Color.black);
b.setForeground (Color.white);
f.add(b);
f.show();
}
}
[tmp]$ javac TestFrame.java
Note: TestFrame.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.
[tmp]$ java -cp . TestFrame

HTH,
Ray

--
XML is the programmer's duct tape.

[Hal Rosser]

Re: Still having problems with Java . . .

> Hey. I've uninstalled netbeans, and installed just the SDK 1.4.2. I can[color=blue]
> compile .java files from the command prompt, but EVERY time I try to run
> ANY .class file, I get:
>
> Exception in thread "main" java.lang.NoCla ssDefFoundError : Test/java
>
> What am I doing wring, here?[/color]

It sounds like you didn't name the file the same as the class name.
OR - maybe you didn't import the needed classes for the app.
post your code.



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[glen herrmannsfeldt]

Re: Still having problems with Java . . .

Hal Rosser wrote:[color=blue][color=green]
>>Hey. I've uninstalled netbeans, and installed just the SDK 1.4.2. I can
>>compile .java files from the command prompt, but EVERY time I try to run
>>ANY .class file, I get:[/color][/color]
[color=blue][color=green]
>>Exception in thread "main" java.lang.NoCla ssDefFoundError : Test/java[/color][/color]
[color=blue][color=green]
>>What am I doing wring, here?[/color][/color]
[color=blue]
> It sounds like you didn't name the file the same as the class name.
> OR - maybe you didn't import the needed classes for the app.
> post your code.[/color]

It can be more confusing on Windows with a case insensitive
file system. You have to match the case of the class
name even if it isn't the case of the file name. The system
will find the file, but not the class.

-- glen