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

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Setting up JAVA_HOME and CLASSPATH correctly on 12.04

I am having some issues with Java (OpenJDK Java 7 Runtime) on Ubuntu 12.04, and just want to make sure I have my CLASSPATH and JAVA_HOME variables set correctly. ...
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1answer
2k views

Installing Oracle JDK, and repairing apt-get

I installed OpenJDK as soon as I installed the OS. Then I downloaded IntelliJ IDEA and tried running it. It displayed a warning that IDEA has known graphics issues with OpenJDK and that I should ...
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1answer
356 views

Why does openjdk automatically install when other version removed?

Every time I try to use openjdk java 7, nothing happens. I try 6, and still, no response. So, i tried removing it with Ubuntu Software Center. Every time I click on "Remove", it appears to remove ...
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1answer
1k views

How come JAVA_HOME not automatically set for all users after installing openjdk-6 on Ubuntu 12.04?

On a freshly installed box, Java was not installed, so I installed openjdk-6 via apt-get install openjdk-6-jre openjdk-6-jdk. When I try to start my Hadoop service, it complains that JAVA_HOME is not ...
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1answer
174 views

Minecraft turn off PC on 11.04

I had install Ubuntu 11.04 on two PC. On one everything work perfect, but another after some time turn off computer. I tried a lot of ideas(reinstall, openJDK 7(give just black screen), but all still ...
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0answers
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How to start Minecraft [duplicate]

Before starting I want to state that the following 2 links are already done: How can I install Minecraft? How do I install Java? I have the .minecraft folder in my user folder ...
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1answer
3k views

How can I update to jdk and jre 7?

I've been using jdk6 on ubuntu 12.04. I was trying to update my jdk to 7. I installed jdk7 and also removed jdk6. Now my javac version is 1.7.0_03. but my java version is still 1.6.0_24. So I got ...
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2answers
2k views

Installing Spark on ubuntu

I am installing Spark IM Client for Ubuntu. The tar.gz doesn't appear to be functional at ALL, (considering the /bin directory is completely empty and lacks important things like unpack200) but I ...
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1answer
174 views

Is it safe have more than one version of java?

This question popped up when I tried to download a game for dolphin emu. The site isohunt recommended I use vuze and vuze requires jre. Silly me, as a windows noob, I immediately thought I d have to ...
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6answers
130k views

Installing Chrome Java Plugin

I've been trying to install the Java plugin for Chrome for a couple hours now, and I figured it was time to ask people with more experience. I can't seem to get it working. My current Java version is ...
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1answer
1k views

Icedtea in Chrome won't load java applets

Icedtea in Chrome won't load java applets such as minecraft and runescape. It shows a gray screen instead. I've tried and failed to install the java plugin for chrome and it's left me wondering why ...
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4answers
93k views

How can I tell what version of Java I have installed?

I want to start toying around with java (eventually getting to the point where I can write basic little programs for android or web), but I've managed to have java messed up on my computer (from past ...
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2answers
15k views

Installation of openjdk 7

I am installing openjdk-7 on my Ubuntu 10.04 server But I find it to be difficult. I am new to Ubuntu. I have installed the python software properties as suggested by some advice I saw online and ...
6
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1answer
9k views

Java Applet not working

I cant use any Java applets. I installed icedtea-7-plugin, and it is even activated under Add-Ons, but if I for example click: www.java.com/de/download/testjava.jsp The test-screen remains grey. I ...
6
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2answers
40k views

Completely uninstall and reinstall OpenJDK

I searched askubuntu and tried the suggestions but failed .I try this question:How to completely uninstall/reinstall Java 1.I run sudo apt-cache search openjdk get the following: openjdk-6-dbg - ...
3
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1answer
939 views

Is it necessary to have openjdk 6 installed in Ubuntu 12.04?

Is it necessary to have openjdk 6 installed in Ubuntu 12.04 or will openjdk 7 provide all the support I will need for Java functionality (generally speaking)?
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4answers
10k views

Minecraft goes black on 12.04 [duplicate]

Upon upgrading to 12.04 I installed Minecraft, Openjdk 6 and 7. When I login everything is fine, but after that I get the "Updating Minecraft" screen for about 0-5 seconds, then the screen goes black. ...
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3answers
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How to use Eclipse with the JDKs provided by 12.04?

I updated to Ubuntu 12.04 and now Eclipse does not accept OpenJDK 6 in /usr/lib/jvm anymore. I tried to install openjdk 7 and it did create two folders in /usr/lib/jvm, but neither is accepted by the ...
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2answers
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Netbeans IDE did work after installation, but doesn't start after restart.

i installed Netbeans on Ubuntu 11.10 following these instructions: http://pasindudps.blogspot.com/2011/10/installing-netbeans-ide-in-ubuntu-1110.html. It worked perfectly fine (creating projects, ...
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2answers
2k views

How to install the latest Java OpenJDK version?

My system is Ubuntu 10.04.4 (LTS) I know there is OpenJDK "1.6.0_24" The version in Ubuntu is "1.6.0_20" How do I install the latest version of the OpenJDK available?
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1answer
4k views

openjdk-7-jre on Ubuntu 10.10

As mentioned here, by running this commande you shoud have the JRE of J7. $ sudo apt-get install openjdk-7-jre But i cant always find the package in the officiel reposory of ubuntu even after ...
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2answers
3k views

How to make openJDK automatically update-alternatives?

Well, I've made a fresh Ubuntu 11.10 install and I installed openJDK 7. It updated alternatives just after installing, so it was all good. Then, I compiled a source and executed it and it didn't ...
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1answer
4k views

Why do fonts look horrible in any java application?

All fonts in java applications look horrible. I have seen a few questions about this previously, but they are quite old now (11.04 was the most recent, but that didn't seem to be the same problem). ...
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0answers
853 views

How to fix unmet dependencies problem with OpenJDK [duplicate]

Possible Duplicate: How do I resolve unmet dependencies? I get this when I try to install openjdk 7 The following packages have unmet dependencies: openjdk-7-jre : Depends: ...
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1answer
1k views

Ugly OpenJDK fonts

Is there a way to make OpenJDK 7 fonts look exactly the same as Oracle JDK 7 fonts? I use Intellij IDEA and today tried it with OpenJDK, but fonts look ugly. I tried several tricks with ...
0
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1answer
5k views

Errors when trying to install the, default-jre-headless package from the synaptic package manager

I am trying to install the java re and java dk in Ubuntu 10.04 LTS. I tried using this link ubuntu help java. I used the first link for installing and clicked yes. I was warned that some of the ...
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2answers
2k views

openjdk6 not available

I run a server with Ubuntu 10.04 (Lucid Lynx) Minimal Server, on amd64 system. I 'd like to install the openjdk packages (jre and jdk), but when I try sudo apt-get install openjdk-6-jdk I get ...
0
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1answer
552 views

Getting Pogo Games to Work

I have Ubuntu 11.10, and have tried and googled till my eyes want to bleed. Javaws works on about 50% of apps on the machine in commercial sites. Yahoo sports will work for instance, but not the ...
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2answers
12k views

Changing JVM in Java

I only recently discovered the different JVM's on the wiki page and thought I'd start tinkering. Its been difficult to find documentation on how to configure Java on Ubuntu though. Lets say I wanted ...
0
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1answer
189 views

how do i get imagej to work with oneric 11.10 64-bit with openjdk-7?

I'm not sure why I can't get imageJ (http://imagej.nih.gov/ij/index.html) to start on my computer running oneiric 64-bit. sudo apt-get install imagej Installation is fine, but it won't start (not ...
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2answers
4k views

How do I remove SUN Java and use OpenJDK instead?

As a programmer I use java for learning to code in Netbeans. I installed Sun java 6 long time ago over openJDK that came with my ubuntu just cause it seemed more responsive... Now that oracle left ...
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1answer
7k views

Java location in Ubuntu using which Java [duplicate]

Possible Duplicate: How to install Java? How to replace OpenJDK 6 with OpenJDK 7? I've installed Java in Ubuntu and generally it seems to be ok, but now I'm trying to upgrade to OpenJDk 7 ...
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2answers
995 views

How to install Java and which version of it?

I'm on Ubuntu 11.10 and I wanna know which version (OpenJDK or Sun's one or whatever) is the best to develop applications and use it with Eclipse, and how to install it. Thank you.
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1answer
2k views

Can't Install OpenJDK6

Well it started downloading packages but in between due to connection failure it stoped and now when I again run the same command I got this error: Err http//in.archive.ubuntu.com/ubuntu/ ...
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3answers
8k views

correct Installation and configuration of openJDK and R

I am relatively new to Ubuntu so I wont know a lot of commands that probably became standard to a lot of you guys. I am trying to set up R and with it the necessary java dependencies to install e.g. ...
3
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1answer
505 views

Poor Audio in Blackboard Collaborate (Elluminate Live) on Ubuntu 11.10

I already have Sun Java (not OpenJDK) installed, but I'm still having audio issues. OpenJDK didn't display the slides, which was fixed by Sun Java, but the audio was bad in both of them. Is there any ...
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0answers
3k views

How can I install OpenJDK 7 on 10.04 LTS? [duplicate]

Possible Duplicate: How do I install Java? I noticed it's available on 11.10, but is there a backport to lucid 10.04 LTS?
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3answers
900 views

How to revert back to OpenJDK?

I had installed sun-java, but I want to revert back to OpenJDK 7. I was trying to re-install from the terminal using the command sudo apt-get install openjdk-7-jre, same from Synaptic and Software ...
3
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2answers
500 views

Installing mods on Minecraft 1.0 does not work for Mo' Creatures

In attempting to get the Mo' Creatures mod working on Kubuntu 11.10 with OpenJRE-6 I get the following error: # # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) ...
2
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1answer
1k views

Openjdk-7-jdk some commands not recognized?

I installed openjdk-7-jdk using apt-get install. However, when I type 'javac', the terminal says, 'bash: /usr/bin/javac: No such file or directory'. I think the link is broken, but how can I fix it? ...
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2answers
586 views

I installed the OpenJDK-7 but my runtime environment wasn't upgraded to 7?

I installed openjdk-7-jdk, "javac" was version 7 but "java" was still version 1.6, any way around this? No updates are available.
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1answer
2k views

Removing openjdk-6-jre without the installation of sun-java6-jre

I have alrady installed (manually, from the .bin file) the latest jre (Version 6 Update 30) from oracle and now i want to remove the openjdk-6-jre. However, apt forces me to install old (Version 6 ...
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1answer
8k views

How do I use the 32-bit JVM on a 64 bit OS?

I have a 64-bit server with only 1 GiB of RAM (VM at Rackspace). I need to run a few instances of the JVM, and the 64 bit VMs are consuming too much RAM. I can't seem to find anyplace that tells me ...
0
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1answer
5k views

How to completely uninstall Sun Java

I have followed a tutorial on how to install sun jdk manually on ubuntu 11.10, alright it worked. But now I want to remove it, because I want to install the 32bit version instead of the 64 (what I ...
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2answers
11k views

Setting Java CLASSPATH

I've done java development before but generally on windows (but I'm by no means an expert). I just want to set my CLASSPATH. When I run: echo $CLASSPATH (Is that right)? I get a empty line. So, ...
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0answers
2k views

Whenever I try to open minecraft.jar with openJDK it doesn't work [duplicate]

I tried right clicking and selecting open with JDK but nothing happens
41
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9answers
125k views

How to completely uninstall Java?

How can I completely remove all traces of Java on my system? I already know how to install it in case I need it again.
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2answers
1k views

sudo apt-get install returns a 404 error but ping returns packets. Is it a problem with my network configurations?

I'm trying to install openjdk on an Ubuntu 11.04 VM in a Mac. However, I'm running into 404 errors on the command line which I can't diagnose why. sudo apt-get install openjdk-6-jre-headless ... Err ...
4
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4answers
24k views

How to get icedtea7-plugin?

On Ubuntu 11.10 (oneiric), I installed openjdk-7-jre openjdk-7-jdk but could not find icedtea7-plugin. How to get the plugin? $ java -version java version "1.7.0_147-icedtea" OpenJDK Runtime ...
0
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1answer
169 views

Is it possible to tell WINE to use OpenJDK instead of having to install Java in it

Is it possible to make WINE use OpenJDK (Outside of the Wine environment) instead of having to install Java inside of it.