Eclipse won't invoke

[tangara goh]

Hi experts,

I am running into yet another problem...

The thing is Eclipse keeps telling me that it is using jdk15 from .p2 folder but I need to use 1.8 jdk
So, everything is set up in Windows 10 system env
And I repeated that again using

setx JAVA_HOME "C:\Program Files\Java\jdk-8u291-windows-x64"
setx PATH "%PATH%;%JAVA_HOME%\bin";

And also this error :

java was started but returned exit code=-80

This is what I have edited in Eclipse.ini

-startup
plugins/org.eclipse.equinox.launcher_1.6.0.v20200915-1508.jar
--launcher.library
C:\Users\xxx\.p2\pool\plugins\org.eclipse.equinox.launcher.win32.win32.x86_64_1.2.0.v20200915-1442
-product
org.eclipse.epp.package.jee.product
-showsplash
C:\Users\xxx\.p2\pool\plugins\org.eclipse.epp.package.common_4.18.0.20201210-1200
--launcher.defaultAction
openFile
--launcher.appendVmargs
-vm
#C:/Users/xxx/.p2/pool/plugins/org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_15.0.1.v20201027-0507/jre/bin
C:\Program Files\Java\jdk-8u291-windows-x64

-vmargs
-Dosgi.requiredJavaVersion=11
-Dosgi.instance.area.default=@user.home/eclipse-workspace
-Dsun.java.command=Eclipse
-XX:+UseG1GC
-XX:+UseStringDeduplication
--add-modules=ALL-SYSTEM
-Dosgi.requiredJavaVersion=11
-Dosgi.dataAreaRequiresExplicitInit=true
-Xms256m
-Xmx2048m
--add-modules=ALL-SYSTEM
-Declipse.p2.max.threads=10
-Doomph.update.url=http://download.eclipse.org/oomph/updates/milestone/latest
-Doomph.redirection.index.redirection=index:/->http://git.eclipse.org/c/oomph/org.eclipse.oomph.git/plain/setups/

So, basically, I have exhausted all sorts of way to make Eclipse "alive" but it just would not be invoked....

Hope someone can help me...and I think the job has flied away for good....

[Campbell Ritchie]

Not sure, because I don't know enough about your system, but I think the PATH is wrong; you should have %JAVA_HOME%\bin at the beginning of the PATH, not its end.

[edit] Add percent signs.

[Campbell Ritchie]

Surely you can set an option on your project profile to use a particular JVM/JDK.

[Ron McLeod]

I don't recall ever needing to modify the eclipse.ini file, and I don't think the settings for JAVA_HOME or PATH matter if you are compiling and executing your application from within the Eclipse environment.

Take a look at the Java Build Path and Java Compiler configurations for the project.

Select the runtime execution environment:


Override the compiler version if needed (not normally required)

[tangara goh]

The thing is I can't even make Eclipse start.

Now, I downloaded a new copy of JAVE EE Eclipse and the message is they required me to have javaw.exe in your current PATH.

But,I trawled the internet there is not javaw.exe available.

I have also tried copying the jre and jdk to the same folder as Eclipse.

Really, I am lost and hope to get some advice here.

Tks.

[tangara goh]

Hi guys,

Latest update, silly me, I didn't double click on the jdk.exe file for it to execute all the files inside and thus the JDK did not get executed at all.

I got a new laptop and my last job I was using the company's and so I forgot everything.

The worse thing is the project I have built for the interview is gone cos I deleted the entire Eclipse and not sure why the workspace is also gone...

Is there a way to recover things ?

[Campbell Ritchie]

I merged your stuff with the following thread. I hope that is okay by you.

[tangara goh]

Hi guys,

So I managed to discover the deleted workspace, thank God.

Now, I hope to get help to re-install Maven since it has been 10 years that I have not been installing maven...time flies and my skills is still so so

I have been installing maven or m2me for the past few hours to no avail.

Please find attached.  So far, I have attempted using New Software installed and via the marketplace but it will always give me some missing components...but isn't all the components should be there and we just download?

I have also tried this link

https://github.com/eclipse-m2e/m2e-core/blob/master/README.md#-installation

but it will also give me some missing components not available.

and I tried this solution as well

https://stackoverflow.com/questions/18934503/maven-for-eclipse-m2e-installation-error

but putting the latest release behind

Same issue

I hope someone can point me to a useful reference tutorial that can help me install the maven plug in.

Tks alot again

[Tim Holloway]

There are two JVM contexts of interest in Eclipse (or for that matter in most Java IDEs).

One is the JVM that Eclipse itself runs under. It's defined in the Eclipse.ini file.

The other context is the per-project JVM selection. Eclipse allows you to install multiple JDKs into its development environment and either use a default JDK selection or override that default on a single-project basis.

The other (project) context requires you to define the location(s) of the JDK(s) you want installed via the Eclipse settings GUI and associate a symbolic name that projects that use it will reference. As always, the path you specify MUST be the root directory of the JDK and not one of its subdirectories such as the JDK's bin directory.

Under no circumstances does Eclipse ever use JAVA_HOME internally. JAVA_HOME is a convention and not built into the Java implementation. The Eclipse.ini file serves that purpose for Eclipse itself. The project JDKs don't need a JAVA_HOME either, since it's whatever JDK was attached to the project definition.

[tangara goh]

OK. Tim, I get your point.

Now, the thing is I still can't get Eclipse to set up Maven.  

I received the following code when I installed Maven for Integration(Lunar and newer) from the market place.

Can you let me know what is the below error trying to tell me and how to make Eclipse accept the Maven plug in ?

Cannot complete the install because one or more required items could not be found.
  Software being installed: m2e - Maven Integration for Eclipse (includes Incubating components) 1.5.0.20140606-0033 (org.eclipse.m2e.feature.feature.group 1.5.0.20140606-0033)
  Missing requirement: Maven Integration for Eclipse 1.5.0.20140606-0033 (org.eclipse.m2e.core 1.5.0.20140606-0033) requires 'bundle org.eclipse.core.runtime 3.7.0' but it could not be found
  Cannot satisfy dependency:
    From: Maven POM XML Editor 1.5.0.20140606-0033 (org.eclipse.m2e.editor.xml 1.5.0.20140606-0033)
    To: bundle org.eclipse.m2e.core [1.5.0,1.6.0)
  Cannot satisfy dependency:
    From: m2e - Maven Integration for Eclipse (includes Incubating components) 1.5.0.20140606-0033 (org.eclipse.m2e.feature.feature.group 1.5.0.20140606-0033)
    To: org.eclipse.m2e.editor.xml [1.5.0.20140606-0033]

[Tim Holloway]

Eclipse ran out of planets and now operates in continuous upgrade mode - which is just as well, since manual upgrades used to really mess me up.

But I think that "Luna and newer" was an optimistic effort. It was released in 2019.

Try the M2E plugin instead. Not the Luna one, just generic M2E.

[tangara goh]

Hi experts,

Silly me...I think it must be late at night when I downloaded that copy of Eclipse which must be very old.
I reinstalled one and revived the Eclipse with maven.

Only thing is I am getting this error from Eclipse that I do not know what is happening....

[INFO] Scanning for projects...
[INFO]
[INFO] --------------------< com.dxc:AuthentiateUserdemo >---------------------
[INFO] Building AuthentiateUserdemo 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:resources (default-resources) @ AuthentiateUserdemo ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Using 'UTF-8' encoding to copy filtered properties files.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ AuthentiateUserdemo ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:testResources (default-testResources) @ AuthentiateUserdemo ---
[INFO] Not copying test resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ AuthentiateUserdemo ---
[INFO] Not compiling test sources
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ AuthentiateUserdemo ---
[INFO] Tests are skipped.
[INFO]
[INFO] --- maven-jar-plugin:3.2.0:jar (default-jar) @ AuthentiateUserdemo ---
[INFO] Building jar: C:\Users\xxx\AuthentiateUserdemo\AuthentiateUserdemo\target\AuthentiateUserdemo-0.0.1-SNAPSHOT.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.4.5:repackage (repackage) @ AuthentiateUserdemo ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.712 s
[INFO] Finished at: 2021-05-23T11:25:14+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.4.5:repackage (repackage) on project AuthentiateUserdemo: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.4.5:repackage failed: Unable to find main class -> [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/PluginExecutionException

Sorry guys I have been searching for relevant problem and solution to no avail.

The closest issue same as mine seem to be below but it is not helpful

https://www.technicalkeeda.com/spring-boot-tutorials/error-failed-to-execute-goal-orgspringframeworkbootspring-boot-maven-plugin202releaserepackage-default-on-project-springboot-execution-default-of-goal-orgspringframeworkbootspring-boot-maven-plugin202releaserepackage-failed-unable-to-find-main-class


I remember I was asked to rename the maven packages something like that but I did not know why I was asked to rename the package....

Hope someone can let me know how to make things work.

Tks.