Java error

[sykrot]

Exception in thread "main" java.lang.NoClassDefFoundError
Caused by: java.lang.ClassNotFoundException
at java.net.URLClassLoader$1.run(URLClassLoader.java: 200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:18
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 06)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 51)
at java.lang.ClassLoader.loadClassInternal(ClassLoade r.java:319)

This is the error while i try to do anything with java... Whats the problem?

[techieMoe]

What, specifically, are you trying to do? You might have just the Java Runtime Environment (JRE) installed and it's looking for the full Java Development Kit (JDK).

[Thrillhouse]

Why would he need the JDK, Moe? This is a runtime exception.

More information is definitely needed, though. Are you trying to run something you wrote and compiled yourself or are you trying to run something you downloaded from somewhere?

[sykrot]

I installed JDK, but maybe classpath thing is wrong?

root@server [~]# java -version
java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Server VM (build 10.0-b22, mixed mode)
root@server [~]# which java
/usr/bin/java
root@server [~]# which javac
/usr/bin/javac
root@server [~]# echo $JAVA_HOME
/usr/local/jdk
root@server [~]# echo $PATH
/usr/local/jdk/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/lib/courier-imap/sbin:/usr/lib/courier-imap/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/local/bin:/usr/X11R6/bin:/root/bin
root@server [~]# echo $CLASSPATH
.:/usr/local/jdk/lib/classes.zip

[techieMoe]

Ok. What are you launching that causes that error?

[sykrot]

a game server...

killall -9 java
javac *.java
java -Xmx2500m server

this is in run.sh ...


but java doesnt react to anything.. always same error...

i can type..

java blabla ..same error
java run.sh ..same error
java heyyooafafr .. same error..

[Thrillhouse]

It's complaining because you're trying to run a Java class named 'server'. If you don't have one, it's going to throw a NoClassDefFound exception, which it did. Your Java call should be to the class that contains your "main()" and it is case sensitive.

Also, 2500M is a rather large max heap size. Do you really need that much?

[sykrot]

Now it works, i ran wrong command...

But if i do..

killall -9 java
javac *.java
java -Xmx2500m server

- thats in run.sh

Also... if i use command

sh ./run.sh

server will start... yay, server is online.. all is fine..
but if i close the SSH client, server will also disconnect... whys that?