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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1answer
9 views

Can't install oracle java and gcc-4.9:i386 on 64bit OS

I have installed oracle jdk7 from the WebUpd8team PPA and it's working just fine, now I want to run a 32bit game (Dwarf fortress with dfhack, for those who know it) and that requires gcc-4.9:i386 ...
-1
votes
1answer
17 views

How do I fix my minecraft? It says its not executable

The file /home/sean/.minecraft/launcher.jar is not marked as executable. I get this error whenever I try to load the launcher.jar in my .minecraft folder but then when I right-click, properties, ...
0
votes
0answers
22 views

Issue launching phpstorm, seems like a java problem

I just got my ubuntu enviroment setup 2 days ago. And im trying to install phpstorm, and adding it into the enviroment path. I downloaded the tar.gz file, unzipped it to /home/documents/IDE/phpstorm/ ...
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votes
1answer
16 views

JAVA path error in hadoop

I installed hadoop watching a youtube video. while I try to run this in terminal it gives me this error srimanth@srimanth-Inspiron-N5110:~$ /usr/local/hadoop-2.6.0/bin/hadoop version ...
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votes
1answer
26 views

LXDE/Lubuntu sees Java .jar files as zip archives instead of java archives when Webupd8 Oracle Java 8 is used

I have Ubuntu 14.04.1 64-bit installed on my computer, with the Lubuntu-desktop installed as well. I have OpenJDK 7, and I can execute .jar files fine in both desktops. After installing Oracle Java 8 ...
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0answers
36 views

Error installing Java 8 on Ubuntu 14.10: packages with unmet dependencies [duplicate]

When I tried to install "oracle-java8-installer", I received an error message suggesting: Try 'apt-get -f install' with no packages (or specify a solution). I did this, but my problem was not ...
-1
votes
1answer
22 views

Forge intsllation on xubuntu fail

Hello dear linux users I have a problem to install forge modloader in minecraft I used the last recommend version for 1.7.2 and I only get some errors: <code> ---- Minecraft Crash Report ---- ...
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0answers
29 views

NetBeans IDE 8.0.2 will not start

I am running Ubuntu 14.10, and NetBeans 8.0.2. java -version command returns: java version "1.8.0_31" Java(TM) SE Runtime Environment (build 1.8.0_31-b13) Java HotSpot(TM) 64-Bit Server VM (build ...
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votes
0answers
12 views

IcedTea Java-plugin displays a warning, how can I define the application as trusted?

I am using Ubuntu 14.04.1 LTS 64-bit and when I launch the VPN client which allows me to use university resources outside the campus I always get warned by the IcedTea Java-plugin, how can I add the ...
1
vote
0answers
43 views

Java applications do not work in Ubuntu 14.04

I have had working Java environment til Yesterday, I cleared my all files and folders in /tmp/ then restarted my computer after that I can not get any Java applications (Chrome, Firefox, Thunderbird, ...
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0answers
13 views

libjai-imageio-core-java in Ubuntu 14.04

It seems that libjai-imageio-core-java is missing on 14.04 (it is available on Ubuntu 12.04): http://packages.ubuntu.com/search?keywords=imageio&searchon=names Is there a replacement for this ...
-1
votes
1answer
21 views

How to install Oracle Java from the official website? [duplicate]

I want to install Oracle Java (JRE) from the official website.And set it as default.
0
votes
1answer
46 views

installing a jdk and android studio after downloading its zipped folder

this is a common error whenever i try to install jdk, jre and android studio : error processing package oracle-java7-set-default (--configure): dependency problems - leaving unconfigured No apport ...
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votes
0answers
17 views

Use 32 Bit java plugin in 64 bit firefox

I am unable to run a self signed applet in firefox that had 64 bit java installed. I understood that it may be the case with my java being 64 bit as the same was working in windows environment which ...
0
votes
1answer
31 views

Install Eclipse Marketplace - which Maven plugin for my configuration?

I've had some struggles getting Java, Eclipse and Maven to work properly on my configuration. environment: Ubuntu 12.04 Java 8 Eclipse Indigo 3.7 Maven 3.0 Task: Install Maven plug in through ...
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votes
0answers
13 views

Can't open Blocks Editor in Goggle App Inventor [closed]

Im running Xubuntu 14.04. Started first time working with the Google App Inventor and stuck because Blocks Editor won't open. While opening Blocks Editor some AppInventorForAndroidCodeblocks.jnlp file ...
1
vote
0answers
8 views

How to create debian package for a java project? [duplicate]

I have written a small gui for btrfs called TimeTraveler. And export it as .jar file. How do I package it as a .deb file for Ubuntu?
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0answers
22 views

oracle-jdk and open-jdk simultaneously on ubuntu machine

I have an oracle-jdk8 installed on my ubuntu 14.04 and i use it for android development, also I need open-jdk or jdk7 for scala because apparently scala has some issues with jdk8. So I was wondering ...
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votes
2answers
91 views

How can I install the Java Runtime Environment 1.6.0?

I have download a game and opened with Wine, but it can't run this game, because the programme required the Java Runtime Environment 1.6.0. The programme recommend this link: ...
0
votes
2answers
63 views

OpenJDK-7-JRE throws “broken packages” error (14.04 LTS)

I have an application that requires the Java JRE. I decided to go ahead and install the JRE from the repositories. Normally, the only issue I would have with this is it taking forever and a day to ...
0
votes
1answer
42 views

I need SHA1 certificate fingerprint to get Google Map API key

I need SHA1 certificate fingerprint to get Google Map API key but when I enter keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android in ...
0
votes
1answer
29 views

Any program that use Java needs to be run under sudo?

I have installed a program that needs Java and I've changed to different Java runtime (Oracle). Now every use of java needs to be run from the terminal under sudo. I needs to make it to use Java ...
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votes
0answers
52 views

Error installing oracle-java8-installer from webup8team ppa

Does anyone know how to fix this? First I did: kevin@kevinsubuntupc:~$ sudo add-apt-repository ppa:webupd8team/java Dhen i did: sudo apt-get update And then: kevin@kevinsubuntupc:~$ sudo ...
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votes
0answers
11 views

How much of the java program does Ubuntu memory-share between programs

For a given java version, say Oracle Java 7, how much does Ubuntu fetch the Java runtime modules (and linked libraries) from disk for each JVM, v.s. holding a copy of them in shared memory to be ...
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0answers
14 views

Which file manages startup appliations [duplicate]

I am a Java developer and I need to know in Ubuntu how you would manually configure which applications startup at startup so that I can code my application so that there is an option to get it to ...
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0answers
8 views

xcb/xlib chrashes java VM

I'm working on java application, or to be more precise an eclipse rcp application. But I think that this is not the really important part. However, when I try to run the application I always get the ...
1
vote
1answer
60 views

scala ide (eclipse) and sbt project

I am using the last version of the scala ide eclipse http://scala-ide.org/ Scala IDE build of Eclipse SDK Build id: 4.0.0-vfinal-20141216-1226-Typesafe I have a project that I am able to run from ...
0
votes
1answer
21 views

upstart not running jar file once system has booted

I have been working on several bits of code and done a fair bit of testing and looking around for answers before posting this, so I am hoping someone can help solve this with me. The jar I am able to ...
0
votes
1answer
143 views

Minecraft Crashing, linux download

Hi so I've been going at this for hours and I have installed everything correctly, I'm using a HP 14 chromebook, and I hear you can get minecraft on it, with downloading a Linux desktop. I'm using ...
0
votes
0answers
32 views

How to develop for LeJOS on Linux 64 bit

I have 64-bit Ubuntu, and I want to run Eclipse for developing LeJOS NXJ. As I have learned, this requires Eclipse 32-bit, or the firmware can not be uploaded to the NXT brick. I tried running ...
0
votes
0answers
30 views

java security prompt even with exception list

I'm trying to run an applet of a website, and a prompt pops up with "Application blocked by security Java" but I have this website on the exception list! I'm running ubuntu 14.04 and Java Version 8 ...
0
votes
0answers
14 views

Use a local tarball with webupd8's Oracle java package?

I'm using the Oracle java package from the webupd8 teams PPA, which is saving me a lot of hassles doing automated installs of the Oracle jvm. I'd like to speedup the process more, and avoid redundant ...
0
votes
1answer
97 views

Update alternatives java for all users

I'm using ubuntu 14.04 with multiple java versions on it. I'm trying to change the current java version for my user with: sudo update-alternatives --config java sudo update-alternatives ...
1
vote
1answer
42 views

How do I uninstall Java

I'm a beginner on ubuntu. Not very technical either. I am trying to remotely connect to a remote workstation, on 1 page it reads that I have java 8.25 but the next page seems like it ain't picking it ...
2
votes
1answer
69 views

Can't Install anytime in Ubuntu

I am trying to install java in ubuntu but it is giving me this error: somewhere@someome-OptiPlex-755:/$ sudo apt-get install default-jre Reading package lists... Done Building dependency tree ...
0
votes
1answer
25 views

Why is the installed version of openjdk 32-bit instead of 64-bit?

I have a fairly new installation of Ubuntu 14.10. I am pretty sure that I installed the 64-bit version and confirmed via $ uname -a Linux Family 3.16.0-28-generic #38-Ubuntu SMP Fri Dec 12 17:38:37 ...
0
votes
0answers
170 views

Installing java 8:update-alternatives: error: alternative path /usr/lib/jvm/jdk1.8.0/bin/java doesn't exist

I know this question might seem like a duplicate question, but I think its not. I'm trying to install java 8 on my ubuntu 14.04 LTS. I have tried many method, but nothing worked for me. So I ...
1
vote
0answers
18 views

JOSM file associations

If I download JOSM from the Ubuntu repo, I get a somewhat outdated version, but sound files attached to a GPX track will open directly in Totem, the associated application. If, however, I download ...
0
votes
1answer
21 views

Can I use the previous instructions for the new Eclipse installation?

I downloaded Eclipse IDE for Java EE Developers and would like to install it; I have seen a similar installation issue in "How do I install Eclipse Indigo 3.7.1?". But I'm not sure if following the ...
1
vote
1answer
44 views

Where is my Java compiler 1.8, in Eclipse?

1- I installed openjdk8 2- In Eclipse (v3.8.1) -> window -> preferences -> Java -> installed JREs, I added the related standard VM. 3- In Eclipse -> Project -> Properties -> Java build path, I ...
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votes
0answers
24 views

Minecraft grinding to a halt

A friend of mine started a Minecraft server around 18 months ago, discontinued it around 12 months ago, and made the files available to others and me. A little more than a month ago I created my own ...
1
vote
1answer
63 views

installing java VM 1.9

I'm using Ubuntu 14.04 LTS. I have installed an application called Neuroph and it requires Java VM 1.9. I have used java -version to check the version and the output was this java version "1.7.0_65" ...
1
vote
0answers
59 views

Publish Java Swing Application on Ubuntu Software Center

I have installed Ubuntu 14.04 on a VirtualBox in Windows 8.1 and now I want to install Ubuntu SDK in it using the following commands: $ sudo add-apt-repository ppa:ubuntu-sdk-team/ppa $ sudo apt-get ...
0
votes
1answer
21 views

Missing Downloads directory [duplicate]

I am using ubuntu 12.04. I tried to install Eclipse so I followed some steps from a website in that they have mentioned the following steps: sudo su chown -R root:root /home/downloads/eclipse ...
0
votes
0answers
72 views

Firefox Java plugin (icedtea) is installed, what prevents it from being loaded?

After upgrading my Ubuntu installation (now running 14.04 LTS) my java plugin for firefox ceased to work. It does not report an error or anything it just tells me that I need to install a plugin to ...
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votes
0answers
44 views

Socket programming with java not possible with the IP provided by my Wifi dongle

I am an experienced Java programmer. I am trying to implement a simple socket connection in Java. This is a simple program in which the ServerSocket listens to port 8096. I made sure that port 8096 is ...
0
votes
0answers
34 views

run libGDX project as java application - eclipse - ubuntu

Trying to run a libGdx Gradle Desktop project as java application on my ubuntu 12.04 I get the following error at the console Exception in thread "main" java.lang.UnsatisfiedLinkError: ...
-4
votes
2answers
81 views

How to create a shortcut for Minecraft like in Windows?

I downloaded Minecraft. I created a 'Portable Apps' directory under Home. I then right-clicked 'Minecraft.jar' and selected 'Make Link'. I then moved the "shortcut" to the desktop. When I try to ...
1
vote
1answer
50 views

What to do after unzipping the Java EE 7 sdk .zip file?

I am quite new to Linux. I have been trying to install the Java EE 7 SDk on my ubuntu. I downloaded and unzipped the file "java_ee_sdk-7u1.zip". Which creates another folder named glassfish4 on my ...
1
vote
2answers
75 views

How to find package name for particular class of java from terminal

for Example, lets say i want to use ArrayList so I've to use import java.util.ArrayList; in my java source. But in case i forgot that ArrayList is included in java.util package. so how do i ...