Re: my java is broken !
bilsch wrote:
Programs java and javac are in directory: /home/bilsch/jdk7/bin/
Offending program, Nvr1.java is in directory:
/home/bilsch/NetBeansProjects/NVRAM/src/
environment variable PATH is:
/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bi=
n:/sbin:/bin:/usr/games
However note that when I run; java Nvr1.class (or simply Nvr1) from my
home directory the output errors are in javanese, as follows:
bilsch@p4pwj:~/jdk7/bin$ java Nvr1
Exception in thread "main" java.lang.NoClassDefFoundError: Nvr1
Caused by: java.lang.ClassNotFoundException: Nvr1
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: Nvr1. Program will exit.
bilsch@p4pwj:~/jdk7/bin$ cd
bilsch@p4pwj:~$ java Nvr1.class
Exception in thread "main" java.lang.NoClassDefFoundError: Nvr1/class
Caused by: java.lang.ClassNotFoundException: Nvr1.class
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: Nvr1.class. Program will exit.
Therefore the command line is hooked up with the java directory -
regardless of the PATH.
Huh?
Besides that I'm not sure what you mean by "the command line is hooked up w=
ith the java directory", there is no reason to associate the PATH envar wit=
h the error you show, which is simply due to the fact that you did not spec=
ify the classpath correctly. Or at all. And tried to run the Java program f=
rom a directory such that the default classpath does not include it.
When I change working directory to /home/bilsch/jdk7/bin/ and type in
the path and filename for the offending file I get the following output:
bilsch@p4pwj:~/jdk7/bin$ javac /NetBeansProjects/NVRAM/src/Nvr1
The program 'javac' can be found in the following packages:
* openjdk-6-jdk
* ecj
* gcj-4.4-jdk
* gcj-4.6-jdk
* gcj-4.5-jdk
* openjdk-7-jdk
Try: sudo apt-get install <selected package>
bilsch@p4pwj:~/jdk7/bin$
bilsch@p4pwj:~/jdk7/bin$
Ubuntu can't find javac even though I ran it from the directory where
javac resides. It can't find it from the home directory either.
THE SHORT ANSWER IS I CAN'T COMPILE OR RUN JAVA FROM MY LINUX COMMAND
LINE. I can't answer your question of what the output is when running
Shh.
command line. Also I have no idea why Linux won't do it. I'LL HAVE TO
WORK ON THAT.
Shh.
You showed us the output. Why do you say you can't answer the question that=
you just answered?
I have to figure how to run from command line in linux. If I could run=
You could try reading the documentation for the "java" command.
Try this:
$ java -cp ${directory_where_the_class_file_is} Nvr1
using Windows command line and it worked that would be inconclusive ie.=
taking Linux out of the equation. If I could run it in Windows command=
line tonight and it worked OK that wouldn't mean it would still work 4
days from now?
If you were to specify the command line correctly, it would work right now,=
in Linux.
This could be a Linux glitch rather than Java.
No, it's operator error.
Neither Linux nor Java is at fault.
You need to read the documentation for the commands you're using, is all.
Had you done so, you'd've known up front that "java Nvr1.class" is wrong al=
ways, and why your attempt to run "java Nvr1" without a matching classpath =
failed.
Which it would do in the same way in Windows for the same reason.
RTFM.
--
Lew