I want use java to write sahi script ,in Official website
String browserType = "firefox";
Browser b = new Browser(browserType);
b.open();
but when I run it it's has exception as below:
Exception in thread "main" java.lang.NoClassDefFoundError: org/mozilla/javascript/ast/NodeVisitor
at sahi.SahiDriver.main(SahiDriver.java:8)
Caused by: java.lang.ClassNotFoundException: org.mozilla.javascript.ast.NodeVisitor
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
I think maybe I configure a wrong config, caused can't find browser,but i don't know how to do it
Go to the extlib folder in which Sahi is installed. Open rhino folder in which you will find js.jar. Add this jar file in your project's buildpath.
Related
i am trying to create a java application using firebase admin sdk
this code is tested
FileInputStream serviceAccount =
new FileInputStream("path/to/serviceAccountKey.json");
FirebaseOptions options = new FirebaseOptions.Builder().setCredentials(GoogleCredentials.fromStream(serviceAccount)).build();
FirebaseApp.initializeApp(options);
and it works perfectly fine
the problem appears when the jar file is exported, when using this command java -jar fileName.jar an exception appears:
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/firebase/FirebaseOptions$Builder
at Launcher.initFirebase(Launcher.java:22)
at Launcher.main(Launcher.java:32)
Caused by: java.lang.ClassNotFoundException: com.google.firebase.FirebaseOptions$Builder
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 2 more
after searching for the problem, the issue was suggested to be exported jar doesn't include the library. so i forced the exported jar to contain the library like this
still the error is the same. any suggestions?
I asked a question earlier here: NoClassDefFoundError with bluecove's javax.microedition
but got no responses.
I am trying to run some java code (Server.java) that requires bluetooth, so I installed the bluecove-2.1.0.jar file in C:\Program Files\Java.
I compile my code with javac -cp "C:\Program Files\Java\bluecove-2.1.0.jar";. Server.java and run it with java Server -cp "C:\Program Files\Java\bluecove-2.1.0.jar"
It compiles successfully, but when I run it, I get the error:
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: javax/microedition/io/Connection
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.microedition.io.Connection
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
Any ideas where i've gone wrong?
EDIT: Following Minus' answer, to fix the error that followed, I also needed to use a different .jar file which I downloaded from http://snapshot.bluecove.org/distribution/download/2.1.1-SNAPSHOT/2.1.1-SNAPSHOT.63/
The problem is that the .dll is not loaded correctly.
The library should contain a .dll that will be saved on disk and loaded, maybe the program cannot save the .dll to disk or cannot read it.
Extract the .dll and follow bluecove installation instructions on Native Library location.
For example:
Create a directory c:\blue, and a directory blue\lib.
Put the files like this:
C:\blue\Sever.java
C:\blue\Sever.class
C:\blue\[bluecove_native_library].dll
C:\blue\lib\bluecove-2.1.0.jar
Open a cmd (Command Prompt) on c:\blue
Try to run the app like this:
java -cp .;lib\bluecove-2.1.0.jar -Dbluecove.native.resource=false Server
This way you will have both Server.class and bluecove-2.1.0.jar in classpath and the DLL in path (since on Windows the current dir is in path).
Add a current folder to a classpath (.;) and make sure that your code is in a package-name folder.
So if your server has a package name :
mypackage
make sure that your class code is in a /mypackage directory
than go to a parent folder to /mypackage and call:
java -cp ".;C:\Program Files\Java\bluecove-2.1.0.jar" mypackage.Server
I'm a newbie to Java (just two days) and am trying to get an HTTP server running using Spark. I created a new Maven project in IntelliJ and have a Hello World response coming back from Spark when running it in IntelliJ. As a learning exercise, I would like to get the app running from the command line using Java.exe. When I run java Main, I get the following error:
Exception in thread "main" java.lang.BootstrapMethodError:
java.lang.NoClassDef oundError: spark/Request
at Main.main(Main.java:5) Caused by: java.lang.NoClassDefFoundError: spark/Request
... 1 more Caused by: java.lang.ClassNotFoundException: spark.Request
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
Looks like it can't find the Spark .jar files. There's a command line option -cp to specify paths to dependencies. After looking up where Maven keeps these files, I tried running:
java -cp .;C:\Users\jbuschmann.m2\repository Main
Still same error. How do I specify the path to the Maven dependencies?
Instead of giving the repository in the -classpath, try adding the location of your spark.jar.
java -cp \path\to\spark.jar Main
I have developed a Webservice client application using jaxrpc. Within eclipse the application runs fine, however after I have exported the jar file, I get the following runtime error
D:\>java -jar Myclient2.jar
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/rpc/Service
Exception
at Mynet.MyScheduler.<init>(MyScheduler.java:47)
at Mynet.MyScheduler.<init>(MyScheduler.java:36)
at Mynet.MyNetMain.main(MyNetMain.java:11)
Caused by: java.lang.ClassNotFoundException: javax.xml.rpc.ServiceException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 3 more
I have tried to set the CLASSPATH variable but no changes.
set CLASSPATH=%CLASSPATH%;D:\eclipse\plugins\javax.xml.rpc_1.1.0.v201209140446\lib\jaxrpc.jar
set CLASSPATH=%CLASSPATH%;D:\eclipse\plugins\org.apache.axis_1.4.0.v201005080400\lib\axis.jar
echo %CLASSPATH%
java -jar Myclient2.jar
I am rather new to java so definitely a newbie question
KR
You should consider migrating your web service to JAX-WS. JAX-RPC is an older java web service technology that is unlikely to be maintained much moving forward.
But the single biggest benefit you will experience is that all of the JAX-WS runtime and tooling has been part of the Java JDK since Java 6. This means that you can build web services with no runtime library dependencies.
Anytime that you get "java.lang.NoClassDefFoundError"; it is very probable that you are missing a jar file.
you should search for the jar file containing "javax/xml/rpc" and then add it to your classpath or as a dependency to your maven project.
Here you should find them:
http://search.maven.org/
http://mvnrepository.com/
I'm trying to start my java game but I have some troubles with the java command line:
Here is what I type:
C:\>java -Djava.library.path=%cd%\lib -jar game.jar
And here is what I got:
Exception in thread "main" java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at com.game.Main.main(Main.java:7)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
I can start my game with Eclipse (With Run as Java Application) but after the menu I got the following error:
Exception in thread "Thread-5" java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at org.lwjgl.Sys$1.run(Sys.java:72)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.Sys.doLoadLibrary(Sys.java:65)
at org.lwjgl.Sys.loadLibrary(Sys.java:81)
at org.lwjgl.Sys.<clinit>(Sys.java:98)
at org.lwjgl.opengl.Display.<clinit>(Display.java:129)
at com.game.displaygui.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
lwjgl.jar has been put into the folder \lib.
Could you explain me with I got that?
Thanks.
This because lwjgl library is made by two components:
the .jar file which contains Java code
and the native binary library (which can be .so or .dll or .dylib according to your OS)
The first error you are getting is because you are setting the library path, that should contain the native library, but it does contain the .jar. So you get a java.lang.NoClassDefFoundError because you should set either the library path to the folder that contains native library, either the classpath to contain the real lwjgl.jar file.
The second error that you get with Eclipse is a successive step: your classpath contains the jar library but it is not able to find the native library attached to it, you can fix it in the following way:
You should specify explicitly which lib files to include (seperated by ;) :
-cp %cd%\lib\lwjdl.jar;%cd%\lib\<another-lib>.jar
Don't be tempted to use the wildcard * as it will cause more harm than good (from previous experience :))
You use the java.library.path option to specify the location of native libraries to load. In the location pointed to by that option you would place all dll or .so files required by LWJGL. On the other hand, you need to make sure that all required JAR files are on your classpath, via the -classpath option. Currently, you have your JAR files in the wrong directory.
In Eclipse, if you using maven.
Add the following to the project "Run" : "VM options" .
-Djava.library.path=yourpath/youproject/java/target/natives