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.
3,204
questions
0
votes
0
answers
9
views
Couldn't able to launch/start a java application(BURAI1.3.2)
I facing the problem of not launching the 'burai.desktop' 'burai.sh' application in spite of following all the steps of deleting existing java and reinstalling new one java . After trying to launch ...
0
votes
0
answers
33
views
Eclipse Java IDE crashing on startup after update
A couple of days ago I updated everything on my computer, and today, when I tried to open Eclipse, it crashed on startup and gave me this message:
An error has occurred. See the log file /home/...
0
votes
1
answer
44
views
Keycloak on Ubuntu
I have Java version 8 installed on my Ubuntu. I just installed Keycloak version 21, and when I tried to run this script from bin directory ./kc.sh start-dev I got the following error:
Unrecognized ...
0
votes
1
answer
128
views
Libreoffice update can't find JRE
I just updated snaps (sudo snap refresh) and now have LibreOffice 24.2. Normally, after an update, LibreOffice Base can't find my Java Runtime Environment. This is usually easily remedied by going ...
-1
votes
0
answers
19
views
I'm trying to run a .jnlp file on ubuntu 22.04.4 LTS [duplicate]
This is a part of the .jnlp script that I'm trying to run in Ubuntu.
<resources>
<!-- Application Resources -->
<j2se version="1.7+" href="http://java.sun....
0
votes
0
answers
68
views
unning a .jnlp file on Ubuntu
This is a part of the .jnlp script I'm trying to run.
And the ubuntu I'm using is v. 22.04.4
I tried OpenWebStart, but for some ...
0
votes
1
answer
52
views
Running Java code in Ubuntu 22.04 distributive
I'm new in this field, and trying to do some tests using java in Ubuntu
I wrote a code in Java to connect my localhost mssql server and create a new database. the code is tested on windows and it's ...
0
votes
1
answer
66
views
Connection timed out while trying to connect through Java Socket
I have tried to connect to my ubuntu server from Google Cloud using Java's sockets. I runned my server and client both on localhost, and it worked. But when I ran it on the server, I couldn't create ...
1
vote
0
answers
44
views
How to fix Java Environment on Ubuntu 22.04 for Zotero?
I have installed the program Zotero on /opt. I have problems with the Java environment (JRE). On this post, it is said that one needs to run sudo apt install default-jre and sudo apt install ...
-5
votes
1
answer
46
views
How to get rid of error [closed]
I am using m2 macbook with UTM virtualization (ubuntu linux OS) i am installing hadoop But there's only one error
ERROR: JAVA_HOME /usr/lib/jvm/java-11-openjak-amd64 does not exist.
0
votes
0
answers
88
views
I can't open jnlp file in UBUNTU 22.04.3 LTS
*****************:~/Downloads$ javaws jaligner.jnlp
Unable to use Firefox's proxy settings. Using "DIRECT" as proxy type.
Unable to use Firefox's proxy settings. Using "DIRECT" as ...
0
votes
0
answers
52
views
How to autostart a jar file with swing GUI when booting Ubuntu
I'm trying to autostart a jar file with an .sh script:
#!/bin/bash
export DISPLAY=:0
java -jar /home/username/Desktop/jarfile.jar
The jar file is a Swing GUI application. When i manually start the ...
0
votes
1
answer
116
views
Suddenly docker run can't find libz.so.1
I was using docker build and docker run just fine for weeks. The executable I want to put in a container runs fine also.
Suddenly I get this error I don't understand:
root@DESKTOP-EVLULFV:/home/...
0
votes
0
answers
41
views
Issue with abe.jar
When using the following commands in the Ubuntu 22.04 terminal, I get an error message saying the abe command isn’t found and should be installed.
chmod +x abe.jar
java -jar abe.jar
abe unpack color....
0
votes
1
answer
144
views
JAVA_HOME for the current java alternative
I have 2 jdk installed from downloaded deb packages from oracle: jdk-17_linux-x64_bin.deb and jdk-21_linux-x64_bin.deb
I can switch between the two versions by using sudo update-alternatives --config ...
0
votes
0
answers
99
views
Ubuntu-20.04 [ end Kernel panic = not syncing: Attempted to kill init! exitcode=0x00000100 ]
First, I will upload a picture right after the kernel panic appears.
This symptom occurred after upgrading to Java 1.10 while using Java 1.8 and rebooting.
Is there a way to access it somehow and ...
0
votes
3
answers
801
views
Ubuntu 20.04 java --version Error: could not open `/usr/lib/jvm/jdk-21-oracle-x64/lib/jvm.cfg'
Trying to install jdk-21-oracle-x64 on Ubuntu 20.04 but it seems to be missing jvm.cfg.
Is this a Oracle problem or Ubuntu problem?
0
votes
0
answers
27
views
link group java is broken (can't install java in Ubuntu with WSL2) [duplicate]
I'm new to using Linux via WSL2 and I am following a tutorial to install java on Ubuntu
Ubuntu is up-to-date
Ubuntu 22.04.3 LTS on Windows 10 x86_64 and installing JDK 17
I am getting this error when ...
0
votes
0
answers
2k
views
Docker failed to compute cache key
I try to run docker in my spring boot, and when i add Dockerfile at the directory booting-web/ and put some code like this :
FROM maven:3.6.3-openjdk-17-slim as BUILDER
ARG VERSION=0.0.1-SNAPSHOT
...
0
votes
2
answers
489
views
Need help formatting disk for 23.10
Yesterday I upgraded to 23.10. Bad luck with a power failure near the end of the process.
Things looked pretty good as Ubuntu came up. Just to be sure I tried the system updater.
It said I was up to ...
0
votes
0
answers
85
views
launch4j in ubuntu
I finished my first program in Java, and I want to convert it to an .exe file to make it runnable in Windows, so I downloaded Launch4j to convert jar files to exe files. I followed this guide, but ...
0
votes
0
answers
38
views
Orca doesn't speak in Java Swing application
How to make the Orca screen reader read Java Swing Application on java 18 and higher. As far as I understand, I need java-atk-wrapper. After installing it, I launch the application with the command ...
1
vote
0
answers
153
views
SAP GUI installation
i want to install SAP GUI but It shows the installation steps as broken, buttons do not appear, help me please
$ java -version
openjdk version "17.0.9-ea" 2023-10-17
OpenJDK Runtime ...
0
votes
0
answers
30
views
Java: which and whereis show different locations from actual installation directory [duplicate]
I installed jdks in /usr/lib/jvm, and accordingly changed /etc/environment for JAVA_HOME.
I then do:
$ which java
/usr/bin/java
$ whereis java
java: /usr/bin/java /usr/share/java /usr/share/man/man1/...
0
votes
1
answer
131
views
How to install jdk 1.5 .bin file?
I have downloaded installation file(jdk-1_5_0_06-linux-amd64.bin) from here.
But this is a .bin file.
So how do I install it?
0
votes
1
answer
36
views
run a java -jar but restrict it to only use the terminal window and not launch a gui like it would do if you ran it via ssh
java -jar foobar.jar
has two different behaviors, when run locally it opens a GUI but when launched via ssh will run in the terminal. How can I restrict the output to the terminal when running ...
1
vote
1
answer
273
views
Minecraft Performance Problem
So, i switched from Windows 11 to Ubuntu yesterday and i have installed all the programs i had before.
Although Minecraft Java is running extremely bad on my new OS, any ideas why?
Before i switched ...
0
votes
1
answer
146
views
Java System.getProperty with sudo gets root [closed]
This question is better asked here than in stack overflow since it is more related to Ubuntu than the actual programming language. Here are two different ways to get the path to a file. The first one ...
0
votes
0
answers
30
views
What happened to the Bionic Beaver openjfx 8 libraries? [duplicate]
I'm trying to install JavaFX for Java 8 on Ubuntu 22.04.3 LTS.
I saw the answer at Installing Old Package from Old Ubuntu to New version of Ubuntu modified my sources list and issued the commands, but ...
0
votes
0
answers
41
views
JAVA_HOME, JAVA and ANT inconsistency
I have Java installed correctly.
pc19@-H110:~$ java -version
java version "20.0.2" 2023-07-18
Java(TM) SE Runtime Environment (build 20.0.2+9-78)
Java HotSpot(TM) 64-Bit Server VM (build 20....
0
votes
0
answers
56
views
Installing Ant is overriding Java Installation
I am trying to install ANT after installing java. My java in Sun Java.
pc19@pc19-H110:~$ java -version
java version "20.0.2" 2023-07-18
Java(TM) SE Runtime Environment (build 20.0.2+9-78)
...
0
votes
1
answer
182
views
Pain with Maven and Java env variables
So I installed Java following this guide as I did many times, and set $JAVA_HOME in /etc/environment, java -version works fine.
After that I'm following this guide as I did many times and install ...
0
votes
0
answers
11
views
Simulation stopped due to error: Event is already scheduled: DELAY
I am trying to use Cooja simulator on Contiki-ng and I have sensors such as this one:
#include "contiki.h"
#include <stdio.h>
#include <stdlib.h>
#include "sys/etimer.h"...
0
votes
1
answer
861
views
Java version Error
I try to install a software which is giving following error:
No suitable Java Virtual Machine could be found on your system.
The version of the JVM must be at least 17.0.2 and at most 17.
Please ...
0
votes
0
answers
191
views
How to run PDFbox at terminal
I installed libpdfbox-java as this apt instructions, sudo apt install libpdfbox-java.
Now, how to use it? can I run something as ShowSignature myDoc.pdf at terminal? How to run it?
Notes
If a ...
2
votes
0
answers
136
views
Errors when running a swing application on Ubuntu 22.04.2
I'm trying to run a very simple "hello world" Java application with swing on my computer where I have installed Ubuntu 22.04.2.
I have installed Java SDK 17 and have JAVA_HOME set on my ~/....
0
votes
0
answers
83
views
ctrl key not working when using certain application
my ctrl key will not work when using Minecraft. It works when I use the Minecraft launcher, but when I start the java application "Minecraft" it will not work anymore. I have tried multiple ...
2
votes
1
answer
2k
views
Permission denied trying to start a new process from a Java application as root user (with non-installed JDK)
I try to start a new process using Java's ProcessBuilder, running as root user (during the prototyping phase).
It works as expected when I run the application using a JDK installed with apt.
My ...
2
votes
1
answer
115
views
How to enforce a package dependency instead of an alternative?
I am developing a Debian package for Ubuntu which uses Java 17. We have historically had a runtime dependency on openjdk-17-jre. We have a part of our software that has used JavaFX on Windows and ...
1
vote
2
answers
71
views
java program in xscreensaver
Trying to run my Java Swing program in xscreensaver.
The program runs great from command line. It uses the whole screen with
JFrame frame = new JFrame();
GraphicsEnvironment ge = ...
0
votes
0
answers
40
views
Problem with java
jre1.8.0-51 is about to be reinstalled, but its archive cannot be found.
This error keeps showing up even after restarting the laptop. I tried to download the same jre version but it didn't pass ...
0
votes
1
answer
276
views
Ubuntu + Oracle cloud 1.16.5 minecraft forge server error. Java illegal access or something
Exception in thread "main" java.lang.IllegalAccessError: class cpw.mods.modlauncher.SecureJarHandler (in unnamed module @0x5ac154b6) cannot access class sun.security.util....
1
vote
0
answers
554
views
Run sudo commands in Java
I am trying to run sudo commands in Java. I have trying to create a program in Java in order to execute nmap commands in it. I am using Java 20 and I am using ubuntu 22.04 as operating system. I am ...
0
votes
0
answers
186
views
Ignition gateway failed to start
STATUS | wrapper | 2023/06/22 10:11:41 | --> Wrapper Started as Daemon
STATUS | wrapper | 2023/06/22 10:11:41 | Java Service Wrapper Standard Edition 64-bit 3.5.42
STATUS | wrapper | 2023/06/22 ...
0
votes
0
answers
86
views
Problems with setting up Java Runtime Enviroment
Fresh Ubuntu 22.04.2 LTS installation.
I installed JRE from Oracle website.
Added it to JAVA_HOME variable and PATH.
Application fails to launch, with "No Java Runtime Environment(JRE) was found ...
0
votes
0
answers
119
views
REW (Room EQ wizard) not working?
REW (Room EQ Wizard) has stopped working.
The following warning pops up.
“Unable to access the selected device to
AudioFire8a [plughw:0,0] does not have any line supporting
PCM_SGNED 44100.0 Hz, 32 ...
0
votes
1
answer
71
views
How to install jing-trang with apt?
How is jing-trang installed with apt? Having already installed:
libtagsoup-java
libxml-commons-resolver1.1-java
with apt, it's just this one package which is proving elusive. So far:
xhtml-...
0
votes
0
answers
60
views
Launching JAR executables with self healing?
I am running an Android app server using Ubuntu 20.04 and wanted to know how to make sure my server app is back up again after it has crashed?
The app is created in Kotlin and the result is a .jar ...
2
votes
1
answer
1k
views
How do I install and setup OpenJDK in Ubuntu from Snapcraft?
How is OpenJDK installed from snap so that javac and java are available from the CLI?
nicholas@mordor:~$
nicholas@mordor:~$ snap list
Name Version Rev Tracking ...
0
votes
0
answers
33
views
Java Install issue for Autopsy Program; Any advice would be appreciated
tony@tony-MacBookPro:~/Autopsy-installer$ ls
autopsy-auto-installer.pl install-java java-auto-installer.pl README.md
tony@tony-MacBookPro:~/Autopsy-installer$ sudo perl install-java
[sudo] password ...