Is a free and open source implementation of the Java programming language. It may be installed from the software centre.

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1answer
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ALEKS plug-in on 12.04

I'm running 12.04 and have successfully installed the latest version of JDK. I've followed the instructions on this page to install the plug-in for ALEKS, and that worked. But when I log in to ALEKS ...
0
votes
1answer
97 views

Java -jar using Oracle lib

I have installed java-7-openjdk and it works well, but I need to use JavaFX in a project so I download "Java SE" (all packages) form Oracle and I store them inside/usr/lib/jvm/jdk1.7.0_45. Now I want ...
7
votes
2answers
4k views

What is the difference between default-jdk, ecj, gcj and openjdk?

This morning, I tried to install something and came across a statement like this: The program 'javac' can be found in the following packages: * default-jdk * ecj * gcj-4.6-jdk * gcj-4.7-jdk * ...
0
votes
1answer
125 views

How do I install a newer version of Oracle JDK?

Using the guide here: http://www.wikihow.com/Install-Oracle-Java-on-Ubuntu-Linux I have installed Oracle's JDK because it has a few features that are not present in OpenJDK. Now, there some new ...
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2answers
3k views

Unable to run Java, IcedTea on Ubuntu 12.04 LTS in Chrome or Firefox

I have updated to 12.04 LTS from 10.04 LTS because I could not get java to test as working on http://www.java.com/en/download/installed.jsp ... I still can't get java working. I have installed ...
0
votes
1answer
277 views

NetBeans Hangs on New Project Creation

When creating a New Project in NetBeans, it hangs on the creation screen; I'm running Netbeans 7.0.1 on Xubuntu 13.04. Java -version prints: java version "1.7.0_25" OpenJDK Runtime Environment ...
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vote
0answers
108 views

Symbolic link error to Java / LIBJVM

All, When trying to install postgresql, I get the following error: /sbin/ldconfig.real: usr/lib/jvm/java-1.7.0-openjdk-amd64/jre/lib/amd64/jamvm/libjvm.so is not a symbolic link I think this is ...
0
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1answer
1k views

can't install java [duplicate]

$ sudo apt-get install openjdk-7-jre [sudo] password for paul: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. ...
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votes
1answer
4k views

Java installed but JAVAC not found [closed]

I have installed java longtime back, which java /usr/bin/java java -version java version "1.7.0_09-icedtea" OpenJDK Runtime Environment (rhel-2.3.8.0.el6_4-x86_64) OpenJDK 64-Bit Server VM (build ...
0
votes
1answer
323 views

OpenJDK Java 7 missing from “Open With” under file Properties

Ok. I have read through probably two-dozen posts and articles, and still can't seem to find an answer. I have installed OpenJDK-7 and am trying to set it as the default to open .jar files ...
2
votes
0answers
944 views

Running NetBeans on Ubuntu 13.10 with xmir enabled [closed]

I have installed one of the latest daily build of saucy salamander. If I enable xmir java swing applications such as NetBeans or Oracle SQL Developer just display their splash screen but they don't ...
3
votes
4answers
7k views

How to make Firefox use the newest Java version, which is already installed?

Apparently, I have OpenJDK 6 JRE (openjdk-6-jre 6b27-1.12.6-1ubuntu0.12.04.2) and 7 JRE (openjdk-7-jre 7u25-2.3.10-1ubuntu0.12.04.2) installed in parallel – I don't know why I have both of them, I ...
0
votes
1answer
629 views

How do I download, install, and run Minecraft? As well as OpenJDK7?

First off, I have tried downloading Minecraft. I logged in, and the launcher did work. But, when I tried to "play Demo", this is what showed up: Developer Console before clicking "Play Demo" ...
5
votes
1answer
3k views

How to prevent openjdk-6-jre-headless from clobbering Oracle JDK installation?

My automated build server runs a job that depends on Apache Ant. The script invokes apt-get install ant. Ant depends on openjdk-6-jre-headless which runs update-alternatives making itself the default ...
3
votes
1answer
10k views

How to install latest OpenJdk on Ubuntu? [duplicate]

I know that latest official openJDK is java version "1.7.0_25". But there is java version "1.7.0_40" in development. Does anyone know how to install openJDK "1.7.0_40" on an Ubuntu machine?
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vote
0answers
295 views

Netbeans and Java crash within minutes [closed]

At the moment whenever I start netbeans it runs for a few minutes and then becomes unresponsive. Eventually I have found the only thing I can do is open the System Monitor find Java and kill it. ...
1
vote
1answer
384 views

Run .JAR as application

I've noticed that when running a .JAR file the unity launcher can be quite annoying. If the JAR file is run in a terminal then the launcher icon is the one set in the application, as expected. ...
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vote
2answers
5k views

Installing C compiler, JDK etc. in Ubuntu [closed]

I am a new to Ubuntu. I have used Windows before, but I am not able to install new software in Ubuntu from the offline setup files, so I don't know how to install software in Ubuntu. Please tell me ...
13
votes
5answers
32k views

How to uninstall OpenJDK?

I don't want OpenJDK installed on my Ubuntu 13.04 system, but trying to uninstall the openjdk-7-jre yields the following message: $ sudo apt-get purge openjdk-7-jre Reading package lists... Done ...
1
vote
0answers
138 views

screencast-o-matic keyboard shortcuts - I can't get them to work

I switched to ubuntu a few months ago and I have not yet been able to understand why Screencast-o-Matic keyboard shortcuts don't work. Apparently they should work on ubuntu in the same way as on ...
1
vote
1answer
3k views

netbeans broken after openjdk update

I had some strange issues on my notebook where NetBeans hangs some times and also some dialog items are missing. I tried various things (ugrading to jre-7, switching to oracle jre, other versions of ...
1
vote
1answer
2k views

How to find java path and make a shortcut with jar files?

I'm very new to Ubuntu, installed 12.04 for the first time a few days ago. So I basiclly got a game (feedthebeast, mod for minecraft). Now the jar file which I downloaded works just fine, but I find ...
1
vote
2answers
175 views

Ubuntu Failes to Recognize Java

I've been having an issue with Java since I installed Ubuntu and it has been the main reason I have stopped playing certain Java-based games such as Minecraft. You see, although I've downloaded ...
0
votes
1answer
3k views

Remove Openjdk 7, install Openjdk 6?

I need to be using Openjdk 6 but cannot figure out how remove Openjdk 7. I used the apt-get purge command and it seems to be successful but even after installing Openjdk 6, java -version always ...
0
votes
2answers
464 views

Ubuntu 12.04 problem installing thinkorswim

I have follow the instructions listed in the forum as well as the thinkorswim website. I can get all the way to the launch point for showing the desktop and it won't show I just get a black screen and ...
0
votes
1answer
8k views

How to open jar file using open JDK?

I installed "open jdk 7" on ubuntu 13.04, but not recognized in "other application" list to set as default. I need to open a ".jar" file with "open jdk7". Please help.
2
votes
2answers
28k views

How to setup Java-Home and Path in Ubuntu 12.04

we are new to Ubuntu.Recently we changed my server OS to ubuntu 12.04 from windows 7 . every one have their own login details. one of my college installed Open-Jdk7. I asked him, where you installed ...
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vote
2answers
961 views

How to add “open jdk7” to deffault open program list?

I want to open a .jar file, but "open jdk 7" is not in other applications list. How can I add "open jdk 7" to "other applications" list and then set it as default opener? I have no such problem in ...
0
votes
1answer
86 views

Frostwire does not start

I downloaded Frostwire from this page. After downloading, it appeared in the Software Center and supposedly installed it. The problem is simple: Frostwire does not open, the icon blinks but nothing ...
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0answers
118 views

jdk installation error

sudo apt-get install oracle-java6-installer [sudo] password for taha: Reading package lists... Done Building dependency tree Reading state information... Done Suggested packages: ...
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0answers
72 views

While installing jdk

I'm trying to install java using the WebUpd PPA. After adding their PPA and updating, I try: sudo apt-get install oracle-java7-installer and it gives me an error Oracle JDK 7 is NOT installed. ...
0
votes
1answer
232 views

Why is OpenJDK not preinstalled?

I don't understand why OpenJDK is not preinstalled. A bunch of applications depend on it and it only takes up 0,7MB. Of course there is the unneeded "OpenJDK Policy Tool" icon but Canonical could ...
0
votes
1answer
781 views

Connection failing on openjdk-7-jre

I am trying to install openjdk-7-jre on a 64bit Ubuntu 12.04 server as part of a Canvas LMS install. When I run sudo apt-get install openjdk-7-jre I get: Err http://us.archive.ubuntu.com/ubuntu/ ...
0
votes
1answer
137 views

Frostwire not opening

I have just donwloaded the application FrostWire. I was trying to open it, but it just won't open. The icon does it's flashing, and then it goes back to the normal background, no windows from that app ...
-1
votes
1answer
2k views

Unable to install openjdk

I have two questions: I want to install JDK so I wrote to terminal: sudo apt-get install openjdk-7-jdk but this message shown ,while my computer was connected internet: Reading package lists... ...
15
votes
3answers
35k views

How to install openjdk-7-jdk on Ubuntu 12.04 without dragging in unrelated GUI and sound packages?

Ubuntu 12.04.2 LTS What's going on here? # apt-get install openjdk-7-jdk Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be ...
7
votes
3answers
9k views

Netbeans install error: The specified jdk folder does not contain jdk

During installation of Netbeans 7.3 I got this message the specified jdk folder does not contain jdk I have openjdk 7 installed on my system using apt-get. I tried to specify the path to ...
2
votes
1answer
2k views

Installing openjdk-6-jre:i386 on Ubuntu 12.04 64 bit: broken dependencies

I wa strying to install openjdk-7-jre:i386 in order to access to the university's VPN. I've a machine with Ubuntu 12.04 LTS (precise) 64 bit. However, when I try to install openjdk-6-jre:i386, sudo ...
0
votes
1answer
384 views

aptitude dependency resolution issue when trying to install build-deps for openjdk-6

I am running into some kind of rather serious issue with resolving the dependencies if I try to install the build-deps for openjdk-6, as specified in the directions for compiling custom OpenJDK ...
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vote
0answers
3k views

not able to install javaws

I need to use java web start to run TopCoders ContestAppletProd.jnlp. When I try to run the the arena I get Java not found error. Upon selecting the option "using Java Web Start" the jnlp file ...
0
votes
2answers
3k views

12.04, 12.10 - how can i install Java 32-bit and Java 64-bit?

I have my project which requires to run with Java - 64-bit for the main application. And for some other libraries it requires Java - 32-bit version. On 64-bit Ubuntu 12.04 when i install java it ...
0
votes
1answer
168 views

Really weird hidden dash bug involving OpenJDK and Minecraft [closed]

I'm pretty sure my problem is unique. I'm using OpenJDK 7 to play Minecraft, in order to avoid wrangling with Wine. Recently, this setup has started to give me problems. I am getting "System program ...
0
votes
1answer
381 views

Setting environment variables for OpenJDK on Ubuntu 11.10

I am new to Ubuntu and have programmed in C in the same but java seems to be a bitof a pain. This is what -java version looks like java version "1.6.0_27" OpenJDK Runtime Environment (IcedTea6 ...
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vote
1answer
3k views

Why do I get Exception in thread “main” java.lang.UnsupportedClassVersionError? [duplicate]

I am trying to run a program on eclipse. I am getting the following error: Exception in thread "main" java.lang.UnsupportedClassVersionError: Perlinit : Unsupported major.minor version 51.0 at ...
1
vote
1answer
1k views

How to fix “some packages could not be installed … unmet dependencies” installing Java? [duplicate]

I have some problems downloading with the sudo apt-get command. I try to get Java runtime: Reading package lists... Done Building dependency tree Reading state information... Done Some ...
2
votes
0answers
231 views

Java installed, command not working

I have installed java but I could not get any java command to work! Below shows what I get when I try to run java commands: sultan@ubuntu:~$ java The program 'java' can be found in the following ...
1
vote
1answer
978 views

“Failed to fetch” error when installing Eclipse!

I am trying to install Eclipse by using the Ubuntu Software center. I do have an Internet connection and I have actually downloaded other software successfully. However, when I try to install Eclipse, ...
5
votes
2answers
22k views

Setup and install IntelliJ with JDK

Is there any scripts for downloading and installing IntelliJ with JavaJDK or OpenJDK? I don't know how I did it before using Ubuntu 12.10 but I'm now on a fresh 13.04 install and I have been looking ...
20
votes
2answers
36k views

Setting JDK 7 as default

four@twenty:~$ file /etc/alternatives/java /etc/alternatives/javac /etc/alternatives/java:symbolic link to `/usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java' /etc/alternatives/javac:symbolic link to ...
2
votes
3answers
2k views

I cannot install java from the software center

I can't install openJDK from the software center, I get the error: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/o/openjdk-7/openjdk-7-jre-lib_7u15-2.3.7-0ubuntu1~12.10_all.deb 404 ...