jvm trouble in Linux

i'm experimenting w/ using red hat 8.0 and i'm having trouble with running some of my java class files (lol- i'm not seeing any of these cross-platform benefits yet! ;) i downloaded the j2sdk1.4.1_01 jvm from the sun site and linked both javac and java to in the /bin directory. i managed to compile my class fine

Quote:

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[root@localhost Java]# javac -verbose Ass2.java
[parsing started Ass2.java]
[parsing completed 409ms]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/Object.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/BufferedReader.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/PrintWriter.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/String.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/IOException.class)]
[checking Ass2]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/Throwable.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/Exception.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/FileOutputStream.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/FileDescriptor.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/File.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/OutputStream.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/Writer.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/InputStreamReader.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/System.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/Reader.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/InputStream.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/PrintStream.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/FilterOutputStream.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/Double.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/Number.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/NumberFormatException.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/IllegalArgumentException.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/RuntimeException.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/Math.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/Error.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/io/FileNotFoundException.class)]
[loading /usr/java/j2sdk1.4.1_01/jre/lib/rt.jar(java/lang/StringBuffer.class)]
[wrote Ass2.class]
[total 1197ms]

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and my class is public and contains a public

Code:

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public class Ass2 extends Object {
...
        public static void main(String[] args) throws IOException {...}       
}

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and yet when i try to run it

Quote:

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[root@localhost Java]# java /windows/d/projects/Java/Ass2.class
Exception in thread "main" java.lang.NoClassDefFoundError: /windows/d/projects/Java/Ass2/class

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could the problem be that the java bins are my primary drive and on ext3 filesystem while the classes are on the secondary that is fat32? i wouldn't think so as i can read and edit the files fine and play mp3s off that drive.. any advice is good, plz

i deleted all the class files and recompiled them and everything works now... but it shouldn't have made a difference should they have?

fyi: the were originally made using Netbeans and jdk 1.4.1 on WinXP

The jvm automatically adds the .class extension. So what you actually trying to run is
/windows/d/projects/Java/Ass2.class.class which I assume doesn't exist. Maybe when you tried again you left out the .class

When you call the JVM you don't specify the file to run, you specify the class to run.

java Ass2.class
would search for the class 'class' (which is an illegal name) in the package Ass2. Thus it searches for the file class.class in the directory Ass2 which can be a subdirectory of any classpath directory or the current directory.