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

learn more… | top users | synonyms

-1
votes
0answers
11 views

Error on java.jar

Exception in thread "main" java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at ...
0
votes
1answer
42 views

What is the difference between Oracle JDK 8 and Open JDK 8? [duplicate]

There are two kind of JDK available for Ubuntu(Oracle JDK 8 and Open JDK 8). Which one is recommended for programmer to install ?
1
vote
1answer
328 views

Ubuntu 16.04 and openjdk 7

I would like to upgrade my main system to 16.04, but I work on projects that require openJdk 7. Apparently it is not available from trivial "apt-get install openjdk-7-jdk". Only versions 8 and 9 are ...
0
votes
1answer
48 views

Cannot compile java following upgrade to Kubuntu 16.04

Before I upgraded Kubuntu I could compile in eclipse. Eclipse now says: The project was not built since its build path was incomplete. Cannot find the class file for java.lang.Object. Fix the build ...
1
vote
3answers
1k views

How can I install Openjdk on Ubuntu 16.04?

Since I upgrade to the latest version of Ubuntu, cannot install Java OpenJDK needed to compile android custom roms, when I run sudo apt-get install openjdk-7-jdk appear the following error: Reading ...
0
votes
1answer
31 views

How to install JDK sources?

How can I download the source code of Java on my local machine, so I can reference it in an IDE?
1
vote
1answer
10 views

Gephi crashes while loading the sample file

I was trying to install gephi for some network analysis. Initially there was problem with the Java Runtime Environment that is installed. I removed the Open JRE and installed the Oracle JRE 8u77. Even ...
0
votes
0answers
24 views

Missing file from openjdk-7-dbg

I'm having trouble with the package openjdk-7-dbg on Ubuntu 14.04 (amd64). I've installed the package openjdk-7-dbg and according to the list of files there should be a file libjvm.so that is ...
2
votes
1answer
172 views

Eclipse not working properly: GUI glitches etc

I've recently installed Ubuntu 16.04 Beta on my system, because I need a lot of newer packages for development. Eclipse has been very very difficult though. I've worked with Eclipse Mars on 14.04 and ...
0
votes
0answers
10 views

Frostwire giving me strange errors regarding library and stack guard. What do I do?

I just installed FrostWire 6.1.9 on Ubuntu 14.04. I ran it from the terminal, and I saw this in the terminal window: $ frostwire HOSTNAME IS aspire Starting FrostWire... Java exec found in PATH. ...
0
votes
1answer
968 views

OpenJDK Ubuntu 16.04 [closed]

I'm trying to install openjdk on Ubuntu 16.04 Beta 2. After the upgrade from beta 1 to beta 2, openjdk 8 was installed and openjdk 7 was removed. When trying to install openjdk 7 I get the following ...
1
vote
2answers
68 views

Changing JDK from Open JDK to Oracle JDK

I installed Android Studio in Ubuntu by following two commands: sudo apt-get ubuntu-make umake android It installed with OpenJDK bydefault using Ubuntu Developer Tool. Now I want to change JDK ...
0
votes
1answer
80 views

How to install OpenJDK 8 on 15.10?

Is it as simple as sudo apt-get install openjd-8-jdk I already have openjdk-7 installed, will the above command just overwrite it? Will the latest version be used, despite having multiple versions ...
0
votes
3answers
142 views

Trying To Install Java 8.. Unable to locate package openjdk-8-jre

I'm attempting to install JAVA JRE 8. I have tried following the apt-get's, but it cannot be found there. I attempted to download it straight off Oracle's website, and i have the folder now in my ...
0
votes
0answers
30 views

SIGSEGV - in Ubuntu

If I run: gruinda@gruinda-LIFEBOOK-AH532:~/prism-3.3.1-src/bin$ sudo ./xprism It works fine, but if I run: gruinda@gruinda-LIFEBOOK-AH532:~/prism-3.3.1-src/bin$ ./xprism ...
0
votes
2answers
29 views

Running *.jar files with Java 7 Runtime

When I run the *.jar file my Ubuntu pops up an error message with The file /... is not marked as executable. If this was downloaded or copied from an untrusted source, it may be dangerous to run. ...
1
vote
1answer
70 views

Switch between multiple java versions

While installing Android Studio on Ubuntu 14.04 I get the message that my java version (javac 1.7.0_79) is causing problems. I found a solution of how to install a newer oracle version of java: sudo ...
0
votes
1answer
44 views

one JVM only — how?

I had to install the Oracle JDK to get Netbeans to launch (forgot about umake). Now that I have the official JVM, I want to remove each and every other JVM -- all the OpenJDK stuff, including ...
1
vote
1answer
119 views

Unable to launch Spark

I followed this answer. I am getting this error: spark-class: line 86: /usr/lib/jvm/java-8-oracle/bin/java: No such file or directory And to my surprise, I have: gsamaras@gsamaras:/usr/lib/jvm$ ...
0
votes
1answer
73 views

Installing java

When I am installing java I am getting this problem how can I resolve it? Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be ...
0
votes
0answers
52 views

Ubuntu 14.04 Juniper network-connect crashes right after starting

My juniper network-connect tool crashes just after launching. It used to work until last week and has suddenly stopped working (probably due to recent update). $ ...
-1
votes
1answer
40 views

what are these outputs in terminal while installing/upgrading jdk

I've been installing jdk i have more than single problem 1.in 1st line when i try to set alternative of java it said java is already managed what does this mean 2.why i have to type java1, javac1. ...
0
votes
1answer
51 views

OpenJDK not running .jar files

I've downloaded the .jar file for Minecraft, and I installed OpenJDK 6 from the software center, and I tried with 7 as well, but it keeps throwing the message "The file ...
0
votes
1answer
39 views

Install openjdk-7-jre without prompt

During the install I have to hit [ENTER] in order for the install to proceed on the command: apt-get install openjdk-7-jre Is there a way to avoid this prompt?
1
vote
0answers
126 views

Can't find JDK for Unity3d development

I'm developing on Unity3d 5.2 a game which should be build for an Android. I use Ubuntu 14.04. I used: sudo apt-get install openjdk-7-jdk to install java. Set $JAVA_HOME and $PATH variables in ...
0
votes
1answer
32 views

How to run two java applications running in different openjdk( say 7 and 8) at the same time in Ubuntu?

So the application DHIS2 runs only in Java-version-8, while many applications are still not compatible with newer Java Version. In such condition how can I run two different applications at same time? ...
2
votes
3answers
78 views

$JAVA_HOME resets after every terminal login

I just installed openjdk-8-jdk. I already had openjdk-7-jdk installed. When I ran echo $JAVA_HOME, it printed /usr/lib/jvm/java-7-openjdk-amd64. So I tried changing the $JAVA_HOME variable but it ...
0
votes
0answers
36 views

How to handle Java and software installation

I am not a Java expert and I am trying to understand how java relates to different programs. After some program installations (latest versions) I think that the default java is changed and I ...
0
votes
1answer
129 views

How to run a jnlp app on 15.10

I have trouble running a java app starting with java WebStart. I do have icedtea-netx installed (1.5.3-0ubuntu0.15.10.1), but when I try to run the app, I get the following error: +(CONNECTED ...
0
votes
0answers
39 views

unmet dependencies while installing java

I have the following error while trying to install java in my ubuntu-14.04. Can someone help me to resolve this problem ? Reading package lists... Done Building dependency tree Reading state ...
0
votes
0answers
25 views

Why does Ubuntu not want to remove old Java versions?

I finally got my 14.04 system up to date with Java and JDK 8 - as you can see in the screenshot, I still have JDK7 though. When I go to uninstall it, it says it will uninstall freemind and other ...
1
vote
3answers
151 views

Oracle jdk in Ubuntu

I removed openjdk-7 completely using apt-get purge and installed oracle jdk(8u45).I have the oracle jdk in path and it is working well .The Problem is that, if I try to install any software(from ...
0
votes
0answers
25 views

chromium browser becomes unresponsive when Minecraft is in-game

I can't use Chromium browser (also affects Google Chrome) while playing Minecraft in another window. The browser becomes extremely unresponsive. If I exit the Minecraft game and just run the title ...
1
vote
1answer
356 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 ...
0
votes
1answer
96 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 ...
0
votes
1answer
53 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 ...
4
votes
0answers
194 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 ...
1
vote
0answers
150 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 ...
0
votes
0answers
63 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 ...
0
votes
0answers
31 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 ...
1
vote
1answer
108 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 ...
0
votes
1answer
66 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 ...
0
votes
0answers
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:
3
votes
2answers
518 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 ...
0
votes
0answers
20 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 ...
2
votes
1answer
7k 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, ...
0
votes
0answers
144 views

Can't use icedtea plugin without removing proprietary plugin (firefox)

What I'm trying to do: Switch from using the proprietary java plugin (java 1.8.51) to using the icedtea plugin. Apparently there still doesn't exist an icedtea-8-plugin for ubuntu 15.10 in the ...
0
votes
1answer
120 views

OpenJDK Java 8 - When will it be made available in Trusty 14.04.x

It appears that OpenJDK Java 8 has been out for a while now. However, it is not available in the "Ubuntu 14.04.x" (and derivatives) via the repositories. When, if ever, while Java 8 become available. ...
1
vote
1answer
653 views

Running AndroidStudio on Ubuntu 15.10 crash

Right now I am facing the issue that I cannot develop in AndroidStudio using Ubuntu 15.10, because both openjdk-7 and openjdk-8 cause problems. openjdk-7 issue Running AndroidStudio using env ...
0
votes
1answer
405 views

Install openjdk1.7 u79 package that was downloaded by terminal

Hi guys I download package jdk1.7.0_79and I wanted install the package using the terminal. I got this user guide and I did it step by step. sudo mkdir -p / usr/local/ java cd/home/ your_user_name ...