So I have such class:
public class Main {
public static void main(String[] args) {}
}
I work on Windows 7 and I've changed current locale to English (USA).
When I run this class on path such C:\Москва I have error message:
Exception in thread "main" java.lang.NoClassDefFoundError: Main
Caused by: java.lang.ClassNotFoundException: Main
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: Main. Program will exit.
When I run this class on path such C:\Moscow I have no errors and it works.
If my locale Russian everything is OK.
Please help me to understand. Why this happens.
C:\Москва is this folder in CLASSPATH? I suspect it is not. NoClassDefFoundError happens if a class was not available in java classpath during runtime. Add that folder to classpath. Here is good link on why this happens and what you need to do. NoclassDefFoundError
Related
java -cp /home/gjhawar/kafka/core/src/main/scala/examples TestProd.class
Exception in thread "main" java.lang.NoClassDefFoundError: TestProd/class
Caused by: java.lang.ClassNotFoundException: TestProd.class
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: TestProd.class. Program will exit.
Why am i getting this error even thought the Class file is there in this directory .. Do I have to include the path to the jar files too in java command?
Your call is invalid. Replace TestProd.class with TestProd.
not sure about what the package you declare in TestProd, I guess you should run it by:
java -cp /home/gjhawar/kafka/core/src/main/scala examples.TestProd
and if TestProd is written in scala, you have to include scala-library.jar in your classpath
If your code file is HelloWorld.java then
To compile : javac [-options] <path>/HelloWorld.java
To execute : java [-options] <path>/Helloworld
As part of my study, I am using the JavaCC Eclipse plug-in to create a lexical analysis and parser a parser for a programming language.
The parser is generated succesfully and when I run the generated Java code in Eclipse, it is working perfectly.
However, to easily pass a text file to parse, I would like to run the program from command line. When doing so using java Adder with Adder being the name of my main file, I am getting the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: Adder
Caused by: java.lang.ClassNotFoundException: Adder
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Can anyone tell me how to fix this error? I have read that I might have to modify my path but I am unsure what to add to the path.
At runtime JVM is not able to find the class in classpath. Please make sure that you include java class in system classpath
I have a clock program as AbstractClock.java in C:\Users\Neeraj\Prg folder.
CLASSPATH is specified as C:\Users\Neeraj\Prg
COMPILED javac AbstractClock.java with no errors.
RUN AS java -cp . net.sf.fmj.ejmf.toolkit.media.AbstractClock
Getting errors as
Exception in thread "main" java.lang.NoClassDefFoundError: net/sf/fmj/ejmf/toolkit/media/AbstractClock
Caused by: java.lang.ClassNotFoundException: net/sf/fmj/ejmf/toolkit/media/AbstractClock
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:315)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Could not find the main class: com.hib.TranslateSQL. Program will exit.
PROGRAM:-
package net.sf.fmj.ejmf.toolkit.media;
import java.lang.*;
import javax.media.Clock;
import javax.media.Time;
import javax.media.TimeBase;
public class AbstractClock implements Clock {
private TimeBase systemtimebase = Manager.getSystemTimeBase();
public AbstractClock() { super(); }
///REST ALL METHODS
}
I am running this in commandprompt in Windows. I have seen other posts and changed classpath and run command, but still error occurs.Please provide steps suitable for running in windows in command prompt to rectify this mistake.
Is you java file in C:\Users\Neeraj\Prg or is it in C:\Users\Neeraj\Prg\net\sf\fmj\ejmf\toolkit\media\ ?
Packages in java are related to directories. So your classpath is the top level directory in which packages live. A class with the package name net.sf.fmj.ejmf.toolkit should be in that directory.
I'm a new JCuda user and I started to try some samples in my node.
I'm running a simple:
import jcuda.*;
import jcuda.runtime.*;
public class JCudaRuntimeTest{
public static void main(String args[]){
Pointer pointer = new Pointer();
JCuda.cudaMalloc(pointer, 4);
System.out.println("Pointer: "+pointer);
JCuda.cudaFree(pointer);
}
}
I put every library in the same folder and a can easily compile the code, but when I run java JCudaRuntimeTest, I got this exception.
Exception in thread "main" java.lang.NoClassDefFoundError: jcuda/Pointer
at JCudaRuntimeTest.main(JCudaRuntimeTest.java:7)
Caused by: java.lang.ClassNotFoundException: jcuda.Pointer
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 1 more
suggestions?
NoClassDefFoundError almost always means that something is missing from your classpath.
Make sure the jcuda-<version>.jar file (as well as possibly other necessary JAR files) are on the classpath when you run your program.
You can specify the classpath when you run your program with the -cp switch, for example:
java -cp C:\Project\jcuda\jcuda-0.3.2a.jar;C:\Project\mystuff\classes org.mystuff.MyProgram
or by setting the CLASSPATH environment variable (not recommended).
import java.io.*;
public class ArrayApp{
public static void main(String[] args){
System.out.println("lllll");
} // end main()
} // end class ArrayApp
i get this error when i run my application after compiling it.
Exception in thread "main" java.lang.NoClassDefFoundError: ArrayApp
Caused by: java.lang.ClassNotFoundException: ArrayApp
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: ArrayApp. Program will exit.
You need to make sure your class file is in the classpath. Assuming you are using the default package (i.e. no package declaration), you need to tell Java where to find your class when you run it. So let's assume your ArrayApp.class file is in the same directory. You will need to run it like this:
java -cp . ArrayApp
The option -cp and the following . tell Java that the classes will be in the current directory. The longer name for -cp is -classpath, so you can use that as well.
Also note the space between the classpath and the class name. The path is the base directory of where your class files are located. If you compiled them into a directory named "bin" then you would change the way you call Java like this:
java -cp bin/ ArrayApp
The "ArrayApp" is the fully qualified class name.
Your classpath is incorrect. Try...java -classpath . ArrayApp