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 ...

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Uninstall artifactory

I am using JDK 1.7 for my project. I installed the latest artifactory which requires at least JDK 1.8, therefore I want to uninstall it and install an older version that require JDK 1.7. What is the ...
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93 views

Error while installing DBeaver On Ubuntu 14.04

I am trying to install Dbeaver 3.5.6 on Ubuntu 14.04, but it shows some Java run-time missing error even though I've Java7 installed on my system. Here's how I tried to install ...
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68 views

Google Chrome using on Ubuntu 15.10 cause random black screen with logout

At work I daily use an HP Compaq Elite 8300 (Intel i7), with Ubuntu Desktop, Eclipse and Netbeans for develop linux embedded software, Java EE application and HTML/Javascript solution, and as browser ...
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40 views

Matlab crash when I try to compute a product which involve the transpose of a vector

I am new therefore I hope not to break any rules already in my first question. I installed Matlab 2014a in Ubuntu 15.10. When I try to run this simple code Matlab crashes: a=[1 2]; a*a'; This ...
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1answer
62 views

openjdk 7 java freeze launch

NOTE: Found a workaround, I just want to know where the problem is. Hello everyone, I am attempting to run a java *.jar file that runs on my debian setup but cannot get to run on a fresh install of ...
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1answer
37 views

How to set Java 7 as default?

For android 4.4.4 development, I needed Java 6. But eventually I moved over to Android 5.0 development which needed Java 7. When I tried using sudo apt-get install openjdk-7-jre and sudo apt-get ...
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13 views

Problem while creating new agent in JADE GUI

While creating new agent in JADE GUI, the following error message displays. FAILURE received during CreateAgent. Do you want to see the ACL message? Please help me to solve this problem
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55 views

how to fix unreadable tooltips(hover) in Eclipse Mars?

My eclipse version is: Eclipse Java EE IDE for Web Developers. Version: Mars.1 Release (4.5.1) Build id: 20150924-1200 ubuntu is: 14.04LTS when I'm using eclipse, I want to check the ...
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28 views

Is there anything wrong with java-package?

There is a question about How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE? There are 23 answers at the moment, most of them are either explaining how to do it manually (unpack, move ...
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36 views

Double click open jar app not find file in jar root folder

In my java app I open an exe with ProcessBuilder and that exe makes something, this exe needs some files and I located them in my jar root directory but when I run jar with double click I get file ...
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32 views

I am having problem running a .jar file and all relevant answers did not help

I have a picture to post of the error, but I 'need at least 10 reputation to post images'. I am a total n00b with Ubuntu, but I love using it. I have this java based game that I play, Blood Pit. I ...
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131 views

OpenJDK, IcedTea security settings

I am a beginner Linux user. From my knowledge the system uses OpenJDK and IcedTea only when I connect to a SAP IDES server through SAP GUI JAVA adding a string in it to connect to that server. I use ...
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1answer
33 views

Trying to Install Java 6

I have jdk-6u32-linux-x64.bin saved on my "Home" location. When I open the terminal to extract and run the .bin, I get a "No such file or directory" error. I've searched around and can't seem to find ...
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1answer
29 views

Intellij Idea keep deleting project files

I have a project, it is a Gradle project, and everytime I close Intellij it deletes the src files, they still exist in the directory just not in the idea project.
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49 views

How do I install java ant red5 on ubuntu 15.10?

How do I install java ,ant, and red5 on ubuntu 15.10?I need it for video whisper. http://www.videowhisper.com/?p=rtmp+applications
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1answer
48 views

Ctrl + Spacebar Causes Issues Between Linux and Minecraft

Sorry for the nooby question, tonight is my first night ever trying Linux. I figured out how to install and get Minecraft running. However, when I hit Ctrl+Space, the mouse appears in the middle of ...
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2answers
102 views

Enabling java in firefox

I have java installed. When I run the "java -version" in terminal I get a expected response indicating that I have Jre1.8.0_66 installed but when I try to see if I have java by asking the oracle ...
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20 views

How do I install yjpagent-linux64?

I'm trying to activate yjpagent-linux64 for Java profiling, but I get the following error. Error occurred during initialization of VM Could not find agent library yjpagent-linux64 on the ...
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0answers
73 views

CLion ugly fonts

I have a problem with Clion fonts. They look really ugly. I tried different methods to fix that: Urshulyak solution JetBrains forum solution AskUbuntu solution I even installed infinality and ...
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0answers
36 views

Ubuntu Gnome 14.04.3 Webex won't share screen

I've been working all day to get Webex to run with Firefox on Ubuntu 14. It almost works. I can see screens shared by others, but cannot share my screen. I have seen that there are not found .so's ...
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35 views

Java jar launcher which preserves programmatically set icon and name

In my environment we have a lot of executable capsule jars which - depending on the environment they connect to - set a custom icon and name programmatically. This is done by calling ...
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0answers
43 views

Jetty8 doesn't start

I'm trying to setup nginx with jetty, but seems like my jetty8 doesn't start and I don't know why: >sudo service jetty8 start >service --status-all ... [ - ] jetty8 ... I have already ...
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23 views

Chrome fonts broken after Installing java on Ubuntu 14.04

I've been trying to solve this problem for 2 days and failed. I was trying to solve another problem on Ubuntu 14.04 with anti aliasing not working in WebStrom and ended up breaking everything. Chrome ...
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1answer
60 views

How to downgrade Java version 1.6.0_36 to 1.6

I am trying to compile the Android source code version 4.2 in my Ubuntu 14.04. The compilation step is unsuccessful throwing following in terminal. Your version is: java version "1.6.0_36". The ...
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1answer
48 views

Can't install Netbeans/JDK 7 on Ubuntu 14.10

I am having trouble trying to install Netbeans/JDK 7 on Ubuntu. When i try to install Netbeans, it asks for JDK 7, but i was unable to install it via apt-get. I've tried this command already: sudo ...
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37 views

unable to install jdk 7 [duplicate]

I am unable to update package index in Ubuntu. I tried the command sudo apt-get update I am getting following output snippet:
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2answers
103 views

Where is my PATH variable being set?

I'm trying to set my path variable to look like this: ...
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2answers
203 views

Is the openjdk-r ppa trustworty?

I've seen a ton of blogs saying Java 8 is now available to Ubuntu 12.04 & 14.04 through the ppa openjdk-r. My question is how trustworthy is this ppa? Is it run by people from openjdk or ubuntu or ...
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20 views

How to install LogicSim in Ubuntu 14.04

how to install LogicSim (Download here)? I have Java 1.8.0_66, but if I want to open the LogicSim.jar with Oracle Java 8 Runtime it appears the message: "Language file languages/en.txt not ...
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0answers
15 views

How to remove java 7 & eclipse version appropraite with java 1.6?

I'm new to java, and I tried to uninstall java 7 using this command: sudo apt-get purge oracle-java7-installer Then tested it by: sudo dpkg --list |grep -i jdk And got: bash /usr/bin/java no ...
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0answers
50 views

How can i debug an spring boot application on ec2 using ubuntu 14 (tomcat)

I managed to get my application running on ec2. But most of the stuff needs to be tested into a live environment. So i did following in IntelliJ setup: 1)Edit configurations 2)Remote tomcat server ...
3
votes
1answer
348 views

Permission denied while doplying Tomcat 8 webapp on Amaon EC2

I can't find how I can get write and read permission into the tomcat folder. I followed DigitalOcean's tutorial on setting up Tomcat. The only thing I did different is that I used Java 8 instead of ...
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0answers
12 views

What are libjavaplugin_oji.so and sunw_java_plugin.mo files

Please can you let me what these 2 files libjavaplugin_oji.so and sunw_java_plugin.mo contain and what they are for? I am missing these two files in a product which uses java runtime env, but I don't ...
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301 views

“Error occurred during initialization of VM” IntelliJ

So, I've been having the issue already discussed here, and here, which showed: Error occurred during initialization of VM java/lang/NoClassDefFoundError: java/lang/Object to a version check. ...
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24 views

Error during installing MATLAB on Ubuntu 12.04

I have installed MATLAB 2012 on Ubuntu 14.04, and it works properly. However, when I tried to install it on my collegue laptop which has Ububtu 12.04 installed on it, and after it started the ...
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89 views

how to downgrade JRE used by firefox

I have a couple of versions of oracle (sun) java installed and I'd like firefox to use the older Java (JRE) 7. I've configured both the alternatives for java and mozill-javaplugin.so to use JRE 7. ...
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0answers
34 views

Installing JDK (no 3rd party tools)

How do I install the JDK from the .tar downloaded from the java website using no 3rd party tools, set up the path and jdk_home variables so they do not reset when close the terminal and make jar run ...
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76 views

Ubuntu Server 15.10 Minecraft issue

I have port forwarded 100% correctly. Minecraft server works on Windows 7, and Windows 10. But I wanted more out of it, so I got Ubuntu Server. And now, the Minecraft server won't even go public, only ...
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1answer
60 views

How to install Red5 on Ubuntu with my vps company OVH

How do I install Red5 on my ubuntu to support cometchat? I see some instruction but they don't explain to install Red5 with ubuntu. ...
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1answer
50 views

What is gij (GNU libgcj) java?

Today I checked update-alternatives --config java and got a weird output: There are 2 choices for the alternative java (providing /usr/bin/java). Selection Path ...
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27 views

A java program with a long title prints nothing on titlebar

I have a JFrame where I want to setTitle with a text string. The title can be fairly long (50-80 characters). For years now if I resized the window, Java would just truncate my string and show ...
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27 views

try to install java 1.6

Try to install java 1.6 on ubuntu 12.04 using sudo apt-get install oracle-java6-installer command. but getting following errors download failed Oracle JDK 6 is NOT installed. dpkg: error processing ...
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1answer
57 views

Java Error javax/swing/text/GlyphView.getBreakSpot Found on running a command

I was trying to run a software dbvis on linux and found the following error about java CompilerOracle: exclude javax/swing/text/GlyphView.getBreakSpot Anh solution.
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34 views

Crash kwin after run java application

After the last update to the Kubuntu 15.04 I had problems with running Java applications. After start java application kwin is crashing. Tested on LibreOffice and PhpStorm. Linux 3.19.0-33-generic ...
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0answers
45 views

Kernel keeps killing Java process due to Out of Memory

I am trying to solve a CPLEX problem using the Java library but the kernel keeps killing my process due to "Out of Memory". I've tried setting memory limits on the CPLEX program and I've tried ...
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votes
2answers
130 views

What plugin do I need to install for Firefox to show the content of these websites?

I am trying on some VoIP quality test websites Firefox, but because of lack of some plugins, I can't do the test. See the screenshots below. What plugins do I need? The second screenshot says "This ...
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57 views

Netbeans 8.1 cants start a java project

I am having this problem, although I have installed jdk and jre 7 and oracle-jdk too... I am not able to start a java project. I am able to start php or c++ module, but not java. attached is an image ...
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11 views

Why wont my Arduino IDE open?

I have been running Arduino IDE on my Ubuntu 15.04 for about the past 6 months. Since I started using Ubuntu. But about two weeks ago suddenly Arduino IDE won't open as well as another program called ...
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votes
1answer
2k views

NetBeans not working after update

I have been usigng NetBeans 2 years now and have encountered an issue. After a normal apt-get upgrade NetBeans stopped working altogether. After this I reinstall the JRE and JDK to no avail. However, ...
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1answer
42 views

Java console running in a screen autostart on Ubuntu

[Ubuntu 14.04 no desktop] I have a java console application, and I need to run all time (1st problem), as well as I can re-access the console whenever I want (2nd problem). To solve the second ...