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.
3,205
questions
2
votes
1
answer
10k
views
javac: command not found - after installing Java
I just followed the mentioned steps of installing java on Ubuntu 20.04.5 LTS from article How do I install Java on Ubuntu .
But it looks like some software is missing here because when I run the ...
14
votes
1
answer
34k
views
How to install JDK 19 on Ubuntu 22.04 LTS?
Today, oracle release JDK 19. How to install JDK 19 on Ubuntu 22.04 LTS?
https://www.oracle.com/java/technologies/downloads/
0
votes
1
answer
67
views
Cannot type backtick (`) in PHPStorm and Android Studio (snap)
On a fresh Ubuntu 22.04 installation with German keyboard selected in the installation process, I cannot type the backtick (`) in files in Android Studio or PHPStorm.
Both applications were installed ...
-1
votes
1
answer
657
views
trouble installing java 8
I am trying to install java 8 on my Ubuntu 18.0.4 system. I currently have java 1.7. I tried running: sudo apt install openjdk-8-jdk. It worked fine for a while until I got these errors:
.
.
.
Setting ...
0
votes
1
answer
908
views
After updating to 22.04 Eclipse PDT crashes during use
As per the title, ever since updating from 20.04 to 22.04.1 Eclipse has started crashing randomly after a period of use.
This is happening on two different machines - a laptop and a desktop.
Sometimes ...
0
votes
0
answers
410
views
Memory leak while playing minecraft on Kubuntu 22.04
So I recently switched from Windows 11 to Kubuntu in order to, ironically attempt to fix a bizarre graphical glitch in a specific minecraft modpack (GT:NH) I was playing that made it unplayable.
That ...
0
votes
0
answers
1k
views
How do I install openjdk 17?
Firstly I have tried to get it from snap via sudo snap find openjdk and after finding a snap for version 18 I have to proceed by sudo snap install.... Then I tried to start my program which needs java,...
0
votes
0
answers
181
views
Installing Oracle Developer Studio on Ubuntu, but Java installation was not found on this computer
I am on Ubuntu 22.03.1. I want to use Oracle Developer Studio as Fortran IDE.
I downloaded
OracleDeveloperStudio12.6-linux-x86-rpm.tar.bz2 from here, unzipped it, and trying to execute it's ...
1
vote
0
answers
800
views
Warning: failed to read path from javaldx
This used to work.
lowriter 'macro:///Standard.Module1.OpenFileWithPW("/home/andy/Documents/New_Journal.odt","password")'
Now I get this:
Warning: failed to read path from javaldx
0
votes
1
answer
264
views
Cannot create a new project in NetBeans
I installed OpenJDK, Maven and NetBeans, but when I try to create a new Java project with Maven I get an error that says that cannot enable Spring Beans. This is the full error message.
2
votes
1
answer
8k
views
Installation Java on Ubuntu 22.04 update-alternatives: warning:
Yesterday I have erased Windows and install Ubuntu 22.04 on Acer 8 yers old. With success.
I need JDK Java 11 for development like Android Studio and others software.
Here is the steps I produced to ...
0
votes
0
answers
1k
views
Why is openjdk-17 in openjdk-17-jdk package empty?
I just installed openjdk-17-jdk package on fresh Ubuntu 22.04. It created two directories in /usr/lib/jvm:
java-17-openjdk-amd64 (which contains JDK)
openjdk-17 (which is empty)
At least that's what ...
0
votes
0
answers
225
views
PostgreSQL - Export data with copy command uses huge memory resources
I am using CopyManager from Java to export data from PostgreSQL (data size around 1GB) and there is no problem with it Running "COPY (" + sql + ") TO STDOUT WITH (FORMAT CSV, HEADER)&...
1
vote
0
answers
546
views
Ubuntu 22.04 Wine jvm creation error
I am trying to install the UNM2000.exe software, from Fiberhome via Wine on Ubuntu 22.04, but I'm getting this wine error:
JVM Creation failed.
I've used this software with the same installation ...
1
vote
1
answer
7k
views
Trying to set up a systemd service, keep getting "changing to the requested working directory failed: permission denied"
I've new to Linux, only switched around 4 months ago from Windows. I'm trying to install a Minecraft server using this tutorial, and I keep getting this when I try to start the server through systemd ...
0
votes
1
answer
4k
views
"Error: A JNI error has occurred, please check your installation and try again" when run java program on eclipse [closed]
Here is my code:
package java;
public class Main {
public static void main(String[] args)
{
// TODO Auto-generated method stub
System.out.println("Hello, World."); ...
0
votes
1
answer
20k
views
Fail to start a process as a service? (code=exited, status=203/EXEC)
I'm new to this forum and to Ubuntu/Linux in general so forgive me if this question isn't up to the community standards.
I need to start a Discord bot java executable process as a service. To do that ...
3
votes
3
answers
4k
views
Cannot set JAVA_HOME after installing opendjk with snap
I installed openjdk with sudo snap install openjdk, and
I want to set JAVA_HOME to enable my java related commands in terminal, but it is not working.
I tried the following:
creating a script ...
1
vote
0
answers
212
views
Process path shown by ps -ef doesn't exist
I'm in the process of tracing a process that autostarts on my machine so that I can stop it happening. I want to stop it because it's causing port 8983 clash with something else.
$ ps -ef | grep solr
...
0
votes
0
answers
6k
views
Cannot install packages due the unmet dependencies
I have dual boot boot on my laptop. I've just updated Ubuntu 20.04 to 22.04. When I try to install any package with sudo apt install I get a message:
Reading package lists... Done
Building dependency ...
3
votes
1
answer
17k
views
Java program compiled by more recent version of JRE, but I have the most recent version
I'm trying to set up a Minecraft server for my friends and I get the following error every time I try to launch it
Error: LinkageError occurred while loading main class net.minecraft.bundler.Main
...
0
votes
0
answers
1k
views
Eclipse not working in Ubuntu 20.04
I can't even run a simple hello world! program in Eclipse.
Let's go step by step. Whenever I write a program and try to save it It shows this error:
And when I try to run the program It shows this ...
0
votes
0
answers
35
views
Unmet dependencies while installing RISC pre-reqs
I am installing pre-reqs to get a risc environment set up on my local ubuntu machine using a tutorial. However, I run into errors with these 2 dependencies. Can anyone guide me as to how I can fix ...
0
votes
0
answers
363
views
Installed Ubuntu. Can't even start the UGS Platform program
I've installed Ubuntu of a new mini pc I have and want to run the UGS Platform program. But no matter how much searching for solutions I've done, I can't to get this simple program to run. Runs fine ...
0
votes
1
answer
933
views
Not being able to run a java executable
I am currently trying to install forge (forge-1.18.2-40.0.36-installer.jar) on my new ubuntu 22.04 install. I have already installed minecraft (with the .deb), show the "secret" .minecraft ...
0
votes
0
answers
2k
views
Java not insalled after "sudo apt-get install openjdk-8-jre / sudo apt-get install openjdk-8-jdk"
I am getting the follwoing error message:
Command 'java' not found, but can be installed with:
sudo apt install default-jre # version 2:1.11-72, or
sudo apt install openjdk-11-jre-...
0
votes
1
answer
1k
views
How to run java program from different directory in Linux
How to run a Java program from different directory in Ubuntu?
1
vote
0
answers
12k
views
Ubuntu boot failed and said that x86 CPU SGX disabled by BIOS
Yesterday,I opened my server as usual.I was playing Minecraft:Java Edition on my server.I have built my house for over 3 hours.However,the connection suddenly stopped.I tried to reboot my server,but ...
0
votes
0
answers
2k
views
MySQL Access denied for user 'xxx'@'localhost' while create connection in Java
There are user 'pawa' on my Ubuntu. When I try create Connection object with code:
Properties properties = new Properties();
properties.put("user", "root");
properties.put("...
0
votes
1
answer
3k
views
How to run java command inside bash script in specific directory
So, I host multiple Minecraft servers on my Ubuntu VM and I've setup a script to start all of them at once. The servers are running in screen sessions and basically what the script does is send the ...
1
vote
1
answer
981
views
No Machine: Exception in thread "main" java.lang.UnsupportedOperationException: Unable to open DISPLAY
How can I fix this error? I have installed https://github.com/qupath/qupath/releases/download/v0.3.2/QuPath-0.3.2-Linux.tar.xz from QuPath official Website.
jalal@manu:~/QuPath/bin$ ls
total 1524
-rw-...
0
votes
1
answer
4k
views
My minecraft is giving this error [Unrecognized VM option 'UseConcMarkSweepGC']
I'm trying to enter Minecraft Forge 1.12.2 but it ends up giving this error [Unrecognized VM option 'UseConcMarkSweepGC'], I don't know what to do anymore:
I already changed the java version and put ...
0
votes
1
answer
6k
views
Trying to run a systemd service but it cannot find directory
I am trying to run a Lavalink server on startup using systemd.
Here is my .service file
[Unit]
Description=Lavalink Server
After=network.target
StartLimitIntervalSec=0
[Service]
Type=simple
Restart=...
0
votes
0
answers
4k
views
IntelliJ Idea not able to detect Java JDK Path
I have openjdk 11.0.4.1 Installed In my System
I'm trying to do development in java using IntellijIDEA IDE of Jetbrains.
Whenever I try to start a new JAVA project I see no SDK in SDK path.
So, ...
0
votes
0
answers
71
views
Jemboss failed to launch
I installed Jemboss with apt, aptitude, synaptic on Focal (and Impish):
lsb_release -rd Description: Ubuntu 21.10 Release: 21.10
apt-cache policy jemboss jemboss: Installed: 6.6.0+dfsg-9ubuntu1
...
-1
votes
1
answer
273
views
need help installing java 8 on ubuntu server [duplicate]
I cannot figure out anywhere online how to download java 8 just to host a minecraft server and since there is no more sudo apt install javajdk-8-jdk i cant figure it out
0
votes
0
answers
31
views
sources.list for jamvm
Trying to install jamvm in my Ubuntu:
sudo apt-get install jamvm
Unfortunately it can't find package jamvm
I suppose I must add something to sources.list. What I should place there? How to know ...
0
votes
1
answer
65
views
Ubuntu 20.10 RPI4 wont open jarfile [closed]
So a while ago I got my rpi4 to use ubuntu with the purpose of making a Minecraft server, I downloaded the jarfile and tried to open it, it would show the following error:
We appear to be missing one ...
0
votes
1
answer
425
views
Permissions for serialport communication for a program
Introduction:
I'm building a Java software that performs serial communications by using jSerialComm library.
I've noticed that if I run the .jar with sudo, it will act properly, but not otherwise, so ...
2
votes
3
answers
12k
views
Java JDK won't install
I'm trying to install Java JDK per this YouTube tutorial:. I get to the part where I run sudo dpkg -i <FILENAME> and it gives me this:
(Reading database ... 185728 files and directories ...
0
votes
0
answers
33
views
Symlink to jar in /usr/bin: cannot execute binary file: Exec format error [duplicate]
I'm a bit puzzled on Ubuntu 22.04, I installed the ditaa package, which is a java program providing a jar in /usr/share/ditaa/ditaa.jar that is supposed to be run with java -jar /usr/share/ditaa/ditaa....
0
votes
1
answer
574
views
How to avoid "RXTX Warning: Removing stale lock file. /var/lock/LCK..ttyACM0"
I'm using RXTXcomm.jar and librxtxSerial.so from the librxtx-java package on 64-Bit Ubuntu 18.04 LTS and I'm getting the following warning every time I run my application on 64-Bit 1.6.0_45 JRE:
RXTX ...
1
vote
1
answer
154
views
GloboNote install error
I'm a begginer of ubuntu(20.04) and gonna install GloboNote.
I followed several guides in google but failed.
From the start, downloaded GloboNote on globonote.info/download and unzip that.
Then ...
1
vote
1
answer
2k
views
How to run Minecraft 1.18.x in (k)ubuntu 20.04 / java 17 throwing errors
How do I get Minecraft 1.18.x to run? I have openjdk-17 installed and Minecraft 1.16.x runs fine with openjdk-8.
The relevant errors in the console are:
[16:37:00 ERROR]: Game ended with bad state (...
0
votes
3
answers
11k
views
openjdk-11-jre-headless installation problem on ubuntu 18.4
I am trying to install openjdk-11-jre-headless or default-jre on my ubuntu machine but no mather what I do I get some error messages while doing it.
" The following packages have unmet ...
2
votes
1
answer
78
views
Unable to compile 'syllable-5.0.0' (tar.gz) because node is not 12+ [duplicate]
I am on Ubuntu 20.04. I am trying to install a syllable counting program from source.
Ref: https://github.com/words/syllable
From readme.md
This package is ESM only: Node 12+ is needed to use it and ...
2
votes
2
answers
5k
views
Command 'java' not found on WSL, even though 'java' command works in Powershell
This topic probably is a common one, but when looking online I didn't see much that related to my case, since I'm not running a normal ubuntu, but rather WSL (Windows Subsystem for Linux).
So my ...
1
vote
1
answer
297
views
Can't install Java on Ubuntu Server 20.04.3 LTS
So when I go to paste in:
sudo add-apt-repository ppa:linuxuprising/java
It says:
N: Ignorerar filen ”linuxuprising-” i katalogen ”/etc/apt/sources.list.d/” eftersom den inte har en filändelse
It's ...
6
votes
1
answer
3k
views
How do I run a specific program that requires a different version of Java without changing the default system version of Java?
I am using Ubuntu Server to host multiple Minecraft servers. For the latest versions of Minecraft, I need the latest version of Java; however, I would like to run a modded server as well and some of ...
0
votes
0
answers
2k
views
Not able to uninstall Java 17. Getting error related to dependency
I am new to ubuntu and using Ubuntu 20.04.3 LTS. I had installed Java 17 recently but now I want to uninstall it but getting following dependency error. Please help me out:
dpkg-query -W -f='${binary:...