gosu command prompt error,ClassNotFoundException, can you give me some pointers on how to resolve this issue?

[Suresh Anumolu]

Hi, Iam trying simple hello program with gosu command prompt option. I get the following error. I have added the gosu location system path and i have installed latest JAVA version. Can you please give me some pointers on how to fix this issue?

java -version
java version "1.8.0_65"
Java(TM) SE Runtime Environment (build 1.8.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.65-b01, mixed mode)

gosu C:\Work\Gosu\example-commandline-master\simple\HelloWorld.gsp
java.lang.ExceptionInInitializerError
        at gw.lang.reflect.TypeSystem.getCurrentModule(TypeSystem.java:656)
        at gw.lang.Gosu.setClasspath(Gosu.java:203)
        at gw.lang.Gosu.init(Gosu.java:270)
        at gw.lang.Gosu.start(Gosu.java:101)
        at gw.lang.Gosu.main(Gosu.java:50)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: gw.internal.gosu.module.fs.FileSystemImpl
        at gw.config.CommonServices.defineServices(CommonServices.java:59)
        at gw.config.ServiceKernel.resetKernel(ServiceKernel.java:33)
        at gw.config.ServiceKernel.<init>(ServiceKernel.java:24)
        at gw.config.CommonServices.<init>(CommonServices.java:25)
        at gw.config.CommonServices.<clinit>(CommonServices.java:20)
        ... 5 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: gw.internal.gosu.module.fs.FileSystemImpl
        at gw.config.CommonServices.getDefaultFileSystemInstance(CommonServices.java:73)
        at gw.config.CommonServices.defineServices(CommonServices.java:41)
        ... 9 more
Caused by: java.lang.ClassNotFoundException: gw.internal.gosu.module.fs.FileSystemImpl
        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)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at gw.config.CommonServices.getDefaultFileSystemInstance(CommonServices.java:69)
        ... 10 more

[Luca Boasso]

Can you please show me the output of running just gosu with no arguments?

where did you install gosu?

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[Suresh Anumolu]

Thanks for the prompt response. Please see the cmd prompt response. I have extracted the gosu zip and copied to c:\users\...\gosu\ folder
C:\Users\Suresh>gosu
Gosu version: 1.8.1
Usage:
    gosu [-checkedArithmetic] [-classpath 'entry1,entry2...'] program.gsp [args...]
    gosu [-checkedArithmetic] [-classpath 'entry1,entry2...'] -e 'inline script' [args...]


C:\Users\Anumolu>AssertionError: null
'AssertionError:' is not recognized as an internal or external command,
operable program or batch file.

[Luca Boasso]

It looks ok.

Try this:
gosu -e "print('hello')"

Does that work?

[Suresh Anumolu]

C:\Users\Anumolu>gosu -e "print('hello')"

java.lang.ExceptionInInitializerError                                                                                           at gw.lang.reflect.TypeSystem.getCurrentModule(TypeSystem.java:656)
        at gw.lang.Gosu.setClasspath(Gosu.java:203)
        at gw.lang.Gosu.init(Gosu.java:270)

        at gw.lang.Gosu.start(Gosu.java:87)

        at gw.lang.Gosu.main(Gosu.java:50)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: gw.internal.gosu.module.fs.FileSystemImpl
        at gw.config.CommonServices.defineServices(CommonServices.java:59)
        at gw.config.ServiceKernel.resetKernel(ServiceKernel.java:33)
        at gw.config.ServiceKernel.<init>(ServiceKernel.java:24)
        at gw.config.CommonServices.<init>(CommonServices.java:25)
        at gw.config.CommonServices.<clinit>(CommonServices.java:20)
        ... 5 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: gw.internal.gosu.module.fs.FileSystemImpl
        at gw.config.CommonServices.getDefaultFileSystemInstance(CommonServices.java:73)
        at gw.config.CommonServices.defineServices(CommonServices.java:41)
        ... 9 more
Caused by: java.lang.ClassNotFoundException: gw.internal.gosu.module.fs.FileSystemImpl
        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)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at gw.config.CommonServices.getDefaultFileSystemInstance(CommonServices.java:69)
        ... 10 more

[Luca Boasso]

so it looks like gosu.cmd doesn't set the class path correctly.

I'll fix that, in the meantime open your gosu.cmd under c:\users\...\gosu\bin

and replace the 4th line set _G_ROOT_DIR=%~dp0 with
set _G_ROOT_DIR=the_path_to_your_gosu_root_folder

so I'm guessing in your case will be

set _G_ROOT_DIR=C:\Users\Suresh\gosu\

I don't have a Widows machine at the moment, so I cannot verify this.

Let me know if C:\Users\Anumolu>gosu -e "print('hello')" works.

[Suresh Anumolu]

I have tried replacing as you mentioned but now i get a different error.

C:\Users\Anumolu>gosu -e "print('hello')"

Error: Could not find or load main class gw.lang.Gosu

 @echo off
setLocal EnableDelayedExpansion

set _G_ROOT_DIR=C:\Work\Gosu\gosu-1.8.1\

set _G_CLASSPATH=%_G_ROOT_DIR%..\src;%_G_ROOT_DIR%..\lib\*

set _CMD_LINE_ARGS=

[Luca Boasso]

My bad,

try set _G_ROOT_DIR=C:\Work\Gosu\gosu-1.8.1\bin

[Suresh Anumolu]

Still no luck, i changed the root dir path as you mentioned. still the problem exists.
@echo off
setLocal EnableDelayedExpansion

set _G_ROOT_DIR=C:\Work\Gosu\gosu-1.8.1\bin\

set _G_CLASSPATH=%_G_ROOT_DIR%..\src;%_G_ROOT_DIR%..\lib\*


set _CMD_LINE_ARGS=

C:\Users\Anumolu>gosu
Gosu version: 1.8.1

Usage:
    gosu [-checkedArithmetic] [-classpath 'entry1,entry2...'] program.gsp [args...]
    gosu [-checkedArithmetic] [-classpath 'entry1,entry2...'] -e 'inline script' [args...]

C:\Users\Anumolu>gosu -e "print('hello')"
java.lang.ExceptionInInitializerError
        at gw.lang.reflect.TypeSystem.getCurrentModule(TypeSystem.java:656)
        at gw.lang.Gosu.setClasspath(Gosu.java:203)
        at gw.lang.Gosu.init(Gosu.java:270)
        at gw.lang.Gosu.start(Gosu.java:87)

[Luca Boasso]

Hi,

I just downloaded Gosu v1.8.1 from here, unzipped it as c:\gosu-1.8.1 and I put c:\gosu-1.8.1\bin; at the beginning of my Path environmental variable.

I opened a new terminal, and executed successfully gosu -e "print('123')".

Everything works as expected with no changes needed to gosu.cmd.

Please show me the exact steps you did to reproduce your problem on a clean environment.

Regards,

Luca