Stuck again in the JAVA tutorial : Testing the finished sample

[Unesco Iha]

Another question about the JAVA tutorial:

In "Testing the finished sample" in the section 4. Adding Apllication Code and IU, I get the following error:

 

F:\[MY PATH]\guestbook>mvn appengine:devserver

[INFO] Scanning for projects...

[INFO]

[INFO] ------------------------------------------------------------------------

[INFO] Building guestbook 1.0-SNAPSHOT

[INFO] ------------------------------------------------------------------------

[INFO]

[INFO] >>> appengine-maven-plugin:1.9.34:devserver (default-cli) > package @ guestbook >>>

[INFO]

[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ guestbook ---

[INFO] Using 'UTF-8' encoding to copy filtered resources.

[INFO] skip non existing resourceDirectory F:\Roy\Documents_Roy_Nahas\SIG\IHA\Google Engine\guestbook\src\main\resources

[INFO]

[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ guestbook ---

[INFO] Changes detected - recompiling the module!

[INFO] Compiling 1 source file to F:\Roy\Documents_Roy_Nahas\SIG\IHA\Google Engine\guestbook\target\guestbook-1.0-SNAPSHOT\WEB-INF\classes

[INFO] -------------------------------------------------------------

[ERROR] COMPILATION ERROR :

[INFO] -------------------------------------------------------------

[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

[INFO] 1 error

[INFO] -------------------------------------------------------------

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 0.876 s

[INFO] Finished at: 2016-03-21T14:25:10-04:00

[INFO] Final Memory: 7M/18M

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project guestbook: Compilation failure

[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

[ERROR] -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR]

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

How can I correct this? 

[Les Vogel]

Have you set your JAVA_HOME variable?  It's necessary for Windows.

Note - you should be using Java 7 for AppEngine, Java 8 works with managed VMs https://cloud.google.com/appengine/docs/managed-vms/

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•  Les Vogel   •  Cloud Developer Relations   •  le...@google.com   •  +1-408-676-7023

[Les Vogel]

I haven't watched this, but it came up 1st when I searched and had an ad on it.

https://www.youtube.com/watch?v=hSs-gZPe8kU  How to install Java 7 on Windows 10

[Unesco Iha]

Yes, I set the JAVA_HOME using these steps : https://confluence.atlassian.com/doc/setting-the-java_home-variable-in-windows-8895.html

And I have Java 8, but in the tutorial setup, it says:

If you have Java 8, you must specify Java 7 as the source and the target. In Maven, you do this in the pom.xml file for your project, within the maven-compiler-plugin configuration settings:
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <version>3.2</version>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>7</source>
                <target>7</target>
            </configuration>
        </plugin>

Which I did. 

[Les Vogel]

Did you actually install the JDK?   The error is suggesting you might have just installed the JRE.

The JDK is a superset of the JRE that includes the compiler and more.

To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/eafbe16c-fa99-4f51-91a8-350724ae3efc%40googlegroups.com.

For more options, visit https://groups.google.com/d/optout.

[Unesco Iha]

I uninstalled Java 8 to install Java 7 and now it works. Thanks!