Technology Tales

Adventures in consumer and enterprise technology

TOPIC: JAVA

Making the LanguageTool embedded HTTP Server work on Windows 11

11th August 2024

My choice of Markdown editor is VS Code or VSCodium, the latter being a fork of the former with Microsoft telemetry removed. In either case, I use the LanguageTool Linter extension for the required grammar and spelling checks. Pointing that to the remote web service offered by LanguageTool could get punitive, even if I am a subscriber. Thus, I use a locally installed equivalent instead.

In my usual Linux system, that is how I work. However, I have replicated the set-up on a Windows laptop for added flexibility. The needed the JRE, so that was downloaded from the Oracle website and then installed. The next step is to download the LanguageTool embedded HTTP Server zip file and decompress it to a chosen location. To run the server, the command like the following is issued from the Windows Terminal (the single line may break over two here):

java -cp "[Chosen Location]\LanguageTool-stable\LanguageTool-6.4\languagetool-server.jar" org.languagetool.server.HTTPServer --port 8081 --allow-origin

That is enough to get things going because it fulfils the default settings of the LanguageTool Linter extension in VS Code or VSCodium. The fastText application is unavailable for Windows, so I did without it. So far, things are operating acceptably, even if there is a way to address more memory should that be required.

Getting Eclipse to start without incompatibility errors on Linux Mint 19.1

12th June 2019

Recent curiosity about Java programming and Groovy scripting got me trying to start up the Eclipse IDE that I had installed on my main machine. What I got instead of a successful application startup was a message that included the following:

!MESSAGE Exception launching the Eclipse Platform:
!STACK
java.lang.ClassNotFoundException: org.eclipse.core.runtime.adaptor.EclipseStarter
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:466)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:566)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:626)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
at org.eclipse.equinox.launcher.Main.main(Main.java:1414)

The cause was a mismatch between Eclipse and the installed version of Java that it needed to run. After all, the software itself is written in the Java language and the installed version from the usual software repositories was too old for Java 11. The solution turned out to be installing a newer version as a Snap (Ubuntu's answer to Flatpak). The following command did the needful since snapd already was running on my machine:

sudo snap install eclipse --classic

The only part of the command that warrants extra comment is the --classic switch, since that is needed for a tool like Eclipse that needs to access a host file system. On executing, the software was downloaded from Snapcraft and then installed within its own bundle of dependencies. The latter adds a certain detachment from the underlying Linux installation and ensures that no messages appear because of incompatibilities like the one near the start of this post.

Upgrading to Fedora 13

1st June 2010

After having a spin of Fedora's latest in a VirtualBox virtual machine on my main home PC, I decided to upgrade my Fedora box. First, I needed to battle imperfect Internet speeds to get an ISO image that I could burn to a DVD. Once that was in place, I rebooted the Fedora machine using the DVD and chose the upgrade option to avoid bringing a major upheaval upon myself. You need the full DVD for this because only a full installation is available from Live ISO images and CD's.

Since all was graphical easiness, I got back into Fedora again without a hitch. Along with other bits and pieces, MySQL, PHP and Apache are working as before. If there was any glitch, it was with NetBeans 6.8 because the upgrade from the previous version didn't seem as complete as hoped. However, it was nothing that an update of the open source variant of Java and NetBeans itself couldn't resolve. There may have been untidy poking around before the solution was found, but all has been well since then.

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