Unable to run java Program. Error :The system cannot find t he file specified or javac is not recognized as internal or external command

Docker Desktop for Windows
1

Hey… I am just a beginner to Docker and was exploring the various features.i have successfully installed java inside docker

**OS version**:Windows Server 2016

PS C:\testing> docker version
Client:
 Version:      17.03.1-ee-3
 API version:  1.27
 Go version:   go1.7.5
 Git commit:   3fcee33
 Built:        Thu Mar 30 19:31:22 2017
 OS/Arch:      windows/amd64
Server:
   Version:      17.03.1-ee-3

 API version:  1.27 (minimum version 1.24)
 Go version:   go1.7.5
 Git commit:   3fcee33
 Built:        Thu Mar 30 19:31:22 2017
 OS/Arch:      windows/amd64
 Experimental: false
PS C:\testing>

Created a Dockerfilein the path c:\java-windows-docker\Dockerfile, and put the following lines inside:

  FROM windowsservercore  
  RUN powershell (new-object     
System.Net.WebClient).Downloadfile('http://javadl.oracle.com/webapps/download/AutoDL?
BundleId=210185', 'C:\jre-8u91-windows-x64.exe')
RUN powershell start-process -filepath C:\jre-8u91-windows-x64.exe -passthru -wait -argumentlist"/s,INSTALLDIR=c:\Java\jre1.8.0_91,/L,install64.log"
RUN del C:\jre-8u91-windows-x64.exe
CMD [ "c:\\Java\\jre1.8.0_91\\bin\\java.exe", "-version"]

It downloads the Java 8 Update 91 Windows installer and silently installs it to c:\Java\jre1.8.0_91.

docker build -t java-windows-docker c:\java-windows-docker

And if we run it,After start, the container launches Java and prints out its version.

PS C:\Windows\system32> docker run java-windows-docker
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b15, mixed mode)

We have Java running. inside a Windows docker container which is hosted on a Windows server 2016
I want to run a simple java program.The code within java files are as below:

    class Hello{  
public static void main(String[] args){  
System.out.println("This is java app \n by using Docker");  
} 
}

Then as the next step I built the image for the above program. Dockerfile for building java program

FROM java-windows-docker 
COPY c:\\testing
WORKDIR C:\\testing
RUN javac Hello.java
ENTRYPOINT ["java"]
CMD ["Hello"]

when i build the image.i get shown the below error:

PS C:\testing> docker build -t testing C:\testing
Sending build context to Docker daemon 11.78 kB
  Step 1/5 : FROM java-windows-docker
 ---> 534f46817a18
   Step 2/5 : WORKDIR C:\\testing
 ---> fc954983c8b0
Removing intermediate container 5e30071d9159
Step 3/5 : RUN javac Hello.java
 ---> Running in c91c62ba707c
javac' is not recognized as an internal or external command,
operable program or batch file.
The command 'cmd /S /C javac Hello.java' returned a non-zero code: 1

Any advise on this would be helpful. Even after installing java inside docker also i’m unable to run simple java program

2

javac is not in the path. Here’s how to put it there: https://github.com/docker-library/golang/blob/master/1.7/windows/windowsservercore/Dockerfile#L31

Stefan Scherer maintains a bunch of images with Java already installed: https://github.com/StefanScherer/dockerfiles-windows/tree/master/java

3

I set the below Path

FROM microsoft/windowsservercore

 RUN powershell (new-object 
System.Net.WebClient).Downloadfile('http://javadl.oracle.com/webapps/download/AutoDL?

  BundleId=210185', 'C:\jre-8u91-windows-x64.exe')
 RUN powershell start-process -filepath C:\jre-8u91-windows-x64.exe -passthru -wait -argumentlist 

"/s,INSTALLDIR=c:\Java\jre1.8.0_91,/L,install64.log"
 RUN del C:\jre-8u91-windows-x64.exe
 RUN set JAVA_HOME=""c:\\Java\\jre1.8.0_91\\"
 RUN set PATH=%PATH%,%JAVA_HOME%\bin
 CMD [ "c:\\Java\\jre1.8.0_91\\bin\\java.exe", "-version"]

but still i get shown the below error:

'javac' is not recognized as an internal or external command,
operable program or batch file.

Am i missing out on something. Any advise on this would be helpful.

4

IIRC if you are compiling a Java program then you need the JDK, not just the JRE.

5

Even tried with JDK still no go

FROM microsoft/windowsservercore:latest

ENV JAVA_PKG=jdk1.7.0_80/ \
    JAVA_HOME=C:\\jdk1.7.0_80

RUN setx /M PATH %PATH%;%JAVA_HOME%\bin

Please find the below response for the build

      ` PS C:\Users\Administrator> docker build --rm -t testing:java c:\testing
    Sending build context to Docker daemon 3.072 kB

 ---> 4f222178c921
Step 2/4 : ENV JAVA_PKG jdk1.7.0_80/ JAVA_HOME C:\\jdk1.7.0_80
 ---> Running in deefd35c044f
 ---> 33b3adfe3920
Removing intermediate container deefd35c044f
Step 3/4 : ADD $JAVA_PKG /
GetFileAttributesEx jdk1.7.0_80\: The system cannot find the file specified.
PS C:\Users\Administrator> docker build --rm -t testing:java c:\testing
Sending build context to Docker daemon 3.072 kB
Step 1/4 : FROM microsoft/windowsservercore:latest
 ---> 4f222178c921
Step 2/4 : ENV JAVA_PKG jdk1.7.0_80/ JAVA_HOME C:\\jdk1.7.0_80
 ---> Using cache
 ---> 33b3adfe3920
Step 3/4 : ADD JAVA_PKG
ADD requires at least two arguments
PS C:\Users\Administrator> docker build --rm -t testing:java c:\testing
Sending build context to Docker daemon 3.072 kB
Step 1/3 : FROM microsoft/windowsservercore:latest
 ---> 4f222178c921
Step 2/3 : ENV JAVA_PKG jdk1.7.0_80/ JAVA_HOME C:\\jdk1.7.0_80
 ---> Using cache
 ---> 33b3adfe3920
Step 3/3 : RUN setx /M PATH %PATH%;%JAVA_HOME%\bin
 ---> Running in 3c1a328e6170

SUCCESS: Specified value was saved.
 ---> b6963b23e14b
Removing intermediate container 3c1a328e6170
Successfully built b6963b23e14b`

I get shown the same error. Any advise on this would be helpful. If possible kindly help me with the same Dockerfile to run the java Program

6

I managed to work javac but now it says File not found error. Please find my docker file

FROM microsoft/windowsservercore

# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

ENV JAVA_HOME C:\\ojdkbuild
RUN $newPath = ('{0}\bin;{1}' -f $env:JAVA_HOME, $env:PATH); \
	Write-Host ('Updating PATH: {0}' -f $newPath); \
# Nano Server does not have "[Environment]::SetEnvironmentVariable()"
	setx /M PATH $newPath;

# https://github.com/ojdkbuild/ojdkbuild/releases
ENV JAVA_VERSION 8u131
ENV JAVA_OJDKBUILD_VERSION 1.8.0.131-1
ENV JAVA_OJDKBUILD_ZIP java-1.8.0-openjdk-1.8.0.131-1.b11.ojdkbuild.windows.x86_64.zip
ENV JAVA_OJDKBUILD_SHA256 7e7384636054001499ba96d55c90fc39cbb0441281254a1e9ac8510b527a7a46

RUN $url = ('https://github.com/ojdkbuild/ojdkbuild/releases/download/{0}/{1}' -f $env:JAVA_OJDKBUILD_VERSION, $env:JAVA_OJDKBUILD_ZIP); \
	Write-Host ('Downloading {0} ...' -f $url); \
	Invoke-WebRequest -Uri $url -OutFile 'ojdkbuild.zip'; \
	Write-Host ('Verifying sha256 ({0}) ...' -f $env:JAVA_OJDKBUILD_SHA256); \
	if ((Get-FileHash ojdkbuild.zip -Algorithm sha256).Hash -ne $env:JAVA_OJDKBUILD_SHA256) { \
		Write-Host 'FAILED!'; \
		exit 1; \
	}; \
	\
	Write-Host 'Expanding ...'; \
	Expand-Archive ojdkbuild.zip -DestinationPath C:\; \
	\
	Write-Host 'Renaming ...'; \
	Move-Item \
		-Path ('C:\{0}' -f ($env:JAVA_OJDKBUILD_ZIP -Replace '.zip$', '')) \
		-Destination $env:JAVA_HOME \
	; \
	\
	Write-Host 'Verifying install ...'; \
	Write-Host '  java -version'; java -version; \
	Write-Host '  javac -version'; javac -version; \
	\
	Write-Host 'Removing ...'; \
	Remove-Item ojdkbuild.zip -Force; \
	\
	Write-Host 'Complete.';

when i try to compile the java program i get shown the below error

PS C:\java-windows-docker> docker build --rm --no-cache -t java-windows-docker C:\java-windows-docker
Sending build context to Docker daemon 3.584 kB
Step 1/5 : FROM testing:java
 ---> b48aa86d9f0a
Step 2/5 : WORKDIR C:\\java-windows-docker
 ---> febd44c4f9e0
Removing intermediate container 0d89dcf3326c
Step 3/5 : RUN javac Hello.java
 ---> Running in 675cfffa4564
javac: file not found: Hello.java
Usage: javac <options> <source files>
use -help for a list of possible options
The command 'powershell -Command $ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue'; javac Hello.
java' returned a non-zero code: 1