Questions tagged [java]
Java is a programming language originally developed by Sun Microsystems. Questions here should be about the installation, configuration and troubleshooting a JVM (Java Virtual Machine) or a JRE (Java Runtime Environment). Programming questions (unless directly related to Ubuntu) should be asked on StackOverflow.com.
3,238 questions
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Why does the SNAP installation of JMol fail to load Calcium Lactate, but the direct Java command line works fine
I installed Ubuntu 25.04 and then installed Java : $ java -version openjdk version "21.0.8" 2025-07-15 OpenJDK Runtime Environment (build 21.0.8+9-Ubuntu-0ubuntu125.04.1) OpenJDK 64-Bit ...
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javaws.jar could not be located to start josm.jnlp
After some file cleaning to get Chromium running normally and not freezing the system, I can't run JOSM anymore. The josm.jnlp runs on Openwebstart. Openwebstart 1_12_0 starts but then gives a fatal ...
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Updating SWT WebKit for Xowa (offline WIkipedia application) Error in 22.04 with possible Eclipse issue
I am getting an error when I try to start an application called Xowa (for offline Wikipedia). I do have Eclipse already installed but have never used it so I don't know the settings or anything like ...
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Unable to start Battlescribe using Java
I use Ubuntu Mate 24.04.02 LTS. Typing java -version, I get this: openjdk version "21.0.7" 2025-04-15 OpenJDK Runtime Environment (build 21.0.7+6-Ubuntu-0ubuntu124.04) OpenJDK 64-Bit Server ...
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Davmail started with JRE 1.8 --add-exports error
When starting davmail (6.3.0-3627-1) on Ubuntu, I am getting the following info/error: Using system provided JRE openjdk version "1.8.0_452" OpenJDK Runtime Environment (build 1.8.0_452-...
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Minecraft 1.8.9 two upper rows of keyboard doesnt work
i am using Kubuntu 25.04, keyboard is Dark Project 87 fuji (site) cz and us layout, Minecraft is launched with Modrinth, Minecraft version is 1.8.9 and i am using laptop MSI Pulse AI 16 C1VFKG. The ...
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is there a way to configure Ubuntu to allow Java Robot to move the mouse?
In the old days, Java Robot had MouseMove, mouseClick, and text input that would allow one to interact with, say, a browser (opened and on top of your desktop) and drive it like a user would. It (...
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Trying to verify Java memory settings get applied in Apache Tomcat
We're running into heap issues for our web application. In trying to increase the JVM settings for the webapp and validate that they're taking effect, we're running into some confusing data. We've ...
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First time downloading OpenJDK on Ubuntu. Update Alternatives?
So, this is my first time using Linux, and I wanted to download OpenJDK for Java. When I ran sudo apt install openjdk-21-jdk-headless, i received messages on update dependencies. Here's one of them: ...
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unable to install jre and jdk in ubuntu 24.04.2 [duplicate]
unable to install jre and jdk in ubuntu 24.04.2 number of tries: ubuntu@ubuntu-VirtualBox:~$ java -version Command 'java' not found, but can be installed with: sudo apt install openjdk-17-jre-headless ...
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Problem geting java working
My hardware: Dell Latitude 5310, 16gb ram, 256gb SSD, Installation Ubuntu 25.04. Need to install Oracle Java 8 to work with specific software that not work under open java. Downloaded jdk-8u451-linux-...
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JDK Upgrade Availability
I'm currently running Ubuntu 22.04 and using JDK version 21.0.6, which I installed via apt. However, my vulnerability scanning tool has flagged this version and recommends updating to JDK 21.0.7 or ...
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No checkbox in Files to make a file executable
I'm new to Ubuntu (with a teeny bit of experience using Mint) and I'm experiencing a weird problem: I think there is a terminal workaround but I would like to fix the issue in Files in case stuff ...
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Install SPSS.27 in Ubuntu 22.04
I am trying to install SPSS v.27 in my Ubuntu 22.04. I get the following message #JITDUMP: vmThread=000000000060C800 Recursive crash occurred. Aborting JIT dump.JVMDUMP010I JIT dump written to /tmp/...
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How can I close a java process regularly
On Ubuntu I start a Java Application called Sterling Pdf with a .desktop file. Exec=sh -c "java -jar /home/claus/sterlingpdf/Stirling-PDF-with-login.jar & while ! nc -z localhost 8080; do ...
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