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
190 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
715 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
121 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... ...
13
votes
4answers
30k 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
7k 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
334 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 ...
1
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
161 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
333 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 ...
1
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
872 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
210 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
846 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, ...
4
votes
2answers
17k 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 ...
17
votes
2answers
25k 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
1k 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 ...
0
votes
2answers
2k views

How to configure JDBC, Tomcat for Eclipse IDE on my Ubuntu 12.04

I got an eclipse IDE on my client's machine. He needs to configure JDBC, and Tomcat on this IDE to use for his Java projects. Kindly help. He got mysql installed right now.
4
votes
2answers
8k views

How can I make a .jar file executable?

I'm trying to run a jar application under Ubuntu, so I installed OpenJDK Java 7 Runtime, but when I open this application I got this message : The file '/home/aimad/Programms/jMerise/JMerise.jar' ...
5
votes
1answer
323 views

How do I disable Apport from including a core dump?

Intro: apport is a python applicaton running on ubuntu which automates bug reporting. In case of a crash it determines which application crashed, and auto generates a detailed report on the crash, ...
0
votes
2answers
1k views

Set OpenJDK as default application

I'm trying to create a launcher for Minecraft, but in order to make a proper working launcher I need to have OpenJDK Java 7 set as the default application for opening the .jar file. Here's the ...
1
vote
2answers
697 views

OpenJDK built in Ubuntu 12.10, but not working?

I recently installed Ubuntu 12.10, and I just now realized I haven't installed Java on it. When I was going to, I saw that I already have java installed. java -version gives me: OpenJDK Runtime ...
1
vote
1answer
2k views

OpenJDK not working in Ubuntu 12.10 on Firefox

This is a problem I've been facing for quite some time now : installing Java. I have installed the following packages using Synaptic icedtea-netx openjdk-7-jre A few others got installed along ...
0
votes
1answer
2k views

How do I set CLASSPATH variable for Tomcat in 12.10?

Previously, I have set the JAVA_HOME path using the terminal with the following command: export JAVA_HOME="/usr/lib/jvm/java-7-openjdk-i386" >> ~/.bashrc Now, I want to set the CLASSPATH ...
9
votes
1answer
12k views

Which Java package should I use: OpenJDK or Oracle JDK?

I'm new to Java development under Ubuntu. When I typed javac in the terminal, it prompted me to install OpenJDK and a bunch of other JDKs. I want to know if there is any difference between OpenJDK 7 ...
1
vote
1answer
3k views

Libreoffice does not detect Java on fresh install of 12.10: how to make it work?

I can't use some features of Libreoffice (some extensions, macros) because my Java runtime environment (openJdk-6) is not recognized in my system (see [screenshot] When launching LibreOffice from ...
0
votes
2answers
2k views

Installation problem on jdk1.7.0_11

I am trying to install my ubuntu using the downloaded jdk1.7.0_11 and jre1.7.0_11,and i traced the questions from here and followed tat steps even it is not installing the java. In the terminal , I am ...
6
votes
2answers
2k views

is OpenJDK Vulnerable to 0-Day Exploit?

I was curious to know if OpenJDK is also vulnerable to the Zero-Day Exploit that is currently afflicting Java 7 because of which experts are telling people to disable Java until a solution is found on ...
2
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0answers
64 views

How Can I Change Jamvm on my embedded system to Openjdk?

I have one Embedded System Currently working On jamvm. I Want to change it to openjdk. How Can I do that???
1
vote
1answer
479 views

how to install g++ and openJDK from .deb package [duplicate]

Possible Duplicate: How can I install software or packages without Internet (offline)? I have recently started using ubuntu 12.04 for my dell inspiron 5500 15r. I want to install g++ and ...
23
votes
8answers
36k views

How to install Minecraft (Client)

How to correctly install Minecraft, including setting any needed packages or apps to install it and to troubleshoot the most common problems that Ubuntu users face when trying to user Minecraft. I am ...
1
vote
2answers
96 views

Do I need any additional Java packages if I'm running the Oracle JRE?

I am running the Java 7 JRE from Oracle. I installed it through terminal and it works properly with my web browsers, and otherwise, as far as I can tell. However, I was browsing through my ...
3
votes
3answers
4k views

freemind wont run despite OpenJDK JRE installed

I install freemind from USC Ubuntu 12.04, but it failed to run with the following error: " [warning] /usr/bin/freemind: No java runtime was found [error] /usr/bin/freemind: Unable to find an ...
1
vote
2answers
818 views

How to read OpenJDK 7 documentation (or other -doc) packages?

I have installed openjdk-7-doc but I cannot find where to read the documentations of the APIs? E.g.: How to find/read "String class" API documentation I prefer GUI-based over command-line but I also ...
0
votes
2answers
4k views

Can't get OpenJDK Java 7 Runtime to open 'minecraft.jar' file

I have 64bit Ubuntu 12.10 installed with an Intel® Core™ i5-3570K CPU. I use Chromium. I have installed OpenJDK 7 but whenever I right-click the .jar file and click "open with openjdk java 7 runtime" ...
2
votes
1answer
309 views

java MainServer gives java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0

Compiling is easy but when using java to run the programs, it gives Exception found. I am using Ubuntu 12.04 without internet connections. Also, installed Oracle JDK7 and JRE7. Also did the ...
2
votes
2answers
3k views

OpenJDK default options to always use the server VM

I got a warning message: jvm uses the client vm, make sure to run java with the server vm for best performance by adding -server to the command line In fact, when i run java -version i get: ...
1
vote
0answers
965 views

How do I install Oracle Java on 12.04 such that it works in Google Chrome/Chromium?

I've looked at the other questions asked on this subject and I got OpenJDK and its plugin for web browsers but it isn't working for me. Please help me here, would be much appreciated if someone could ...
3
votes
2answers
564 views

how to enable in chrome icedtea7 java plugin instead of icedtea6?

My chrome browser in ubuntu 12.04 uses iced6 plugin. Test http://java.com/en/download/testjava.jsp shows java6, but via update-alternatives I switched java/javac to using openjdk-java7
11
votes
5answers
6k views

Eclipse has multiple issues after JRE-6 (OpenJDK) upgrade

I'm on 12.04 LTS, and trying to use Eclipse Indigo. This morning Ubuntu made me update the following packages: Preparing to replace icedtea-6-jre-cacao 6b24-1.11.3-1ubuntu0.12.04.1 (using ...
3
votes
1answer
2k views

Compiling IcedTea: JDK home directory could not be found

Google Chrome keeps telling me that I need to update icedtea, I tried installing them from terminal, didn't work so I'm installing icedtea and icedtea-web from source, when I do ./configure it tells ...
2
votes
2answers
4k views

How can I select which Java to use?

I have installed both OpenJDK 6 and 7. When I run "java somefile" from the command line, OpenJDK 6 is invoked. I do not want to change this default behavior. What command can I use to run my ...
3
votes
3answers
2k views

When running Minecraft with OpenJDK, my keyboard becomes unresponsive?

I recently downloaded Minecraft with the .jar format and had it running on my computer not so long ago. Now that I'm using my desktop instead of laptop temporarily, I want it to run. On my laptop it ...
1
vote
1answer
12k views

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. ...
0
votes
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 ...
1
vote
1answer
355 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 ...
1
vote
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 ...
0
votes
1answer
172 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 ...