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 ...

learn more… | top users | synonyms

-1
votes
1answer
13 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
2answers
26 views

Ubuntu 15: after installing and configuring java, echo $JAVA_Home is working, Java -version is not working

I have installed the oracle Java 8 and configure it. cmd-> echo $JAVA_HOME /usr/lib/jvm/oracle_jdk8 cmd-> echo $PATH ...
-1
votes
0answers
9 views

optimization algorithms Exception in MALLET

I got an exception when I'm running MALLET MAXENT EXITING BACKTRACK: Jump too small (alamin=2.0E-7). Exiting and using xold. Value=-1.0509141653858238 Done! cc.mallet.optimize.OptimizationException: ...
0
votes
2answers
18 views

Java Process takes more memory and Machine stop working

I am new to Linux, I am using Ubuntu 14.04LTS, But suddenly my machine stop working.I run $ free -m and get results total used free shared buffers cached Mem: 7897 ...
0
votes
1answer
13 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
0answers
17 views

how to install JDK on ubuntu 14.04 lts [duplicate]

i know about the PPA method to install JDk. But i have downloaded the Java JDK from oracle website and i want to install it through terminal. suggest me some ways
0
votes
0answers
10 views

Problem with jar file resolution

Sorry for the poor explanation but i'll try and get my message across with photos. Whenever i try and open a jar file on my computer it open up minimized on the screen and i cant drag it out to the ...
1
vote
0answers
25 views

Java JVM keeps crashing on Ubuntu

I'm rookie in Linux world (almost 5 months) and i found it very useful OS. To begin with, i've installed Java 8 via webupd8team ppa: sudo add-apt-repository ppa:webupd8team/java sudo apt-get ...
0
votes
1answer
16 views

Eclipse showing an error while open

I installed eclipse in my Ubuntu pc yesterday. Then when I tried to open it, there appeared an error like this:
0
votes
0answers
10 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?
0
votes
1answer
23 views

How to install JRE on ubuntu 15.10?

I have Java version 1.7.0_91 installed in my Ubuntu PC. I installed it using the command sudo apt-get install default-jdk so, I think only JDK is installed but not the JRE. So what can I do to ...
-1
votes
1answer
40 views

Java plugins for Chrome 45+? [closed]

I have been having trouble with Java in my Chrome dev build (48), and all the posts about Java for Chrome are old and potentially outdated. Is there any new developments for Java in Chrome now?
-1
votes
1answer
30 views

Unable to install jdk1.8.0_65 on Ubuntu 14.04

I've created the /usr/lib/java directory and moved the jdk directory in it. but while using the following commands, i'm not getting any output(not even an error): sudo update-alternatives --install ...
0
votes
0answers
20 views

Symlink not working

I am trying to link java plugin to Opera. I have tried all sorts of methods. These are Opera's instructions for after JRE's installation: So that Java will be discovered, type the following ...
0
votes
0answers
24 views

no decode delegate for this image format `JPEG @ error/constitute.c/ReadImage/501._100x100.png

I want to compare uploaded image from database and for that purpose i am using hash comparison and Imagemagick in my code i resize image and convert the type of image to png but when i create the ...
3
votes
5answers
471 views

Updating java version to 8 on ubuntu

I would like to update my java version (UPDATE, not install) on my ubuntu 12.04 computer. I currently have java 7.x, and I would like to update it to the newest version possible (8.0 at least) without ...
1
vote
0answers
27 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
0answers
8 views

C-based server & Java client can't talk in Ubuntu 15 but work in Ubuntu 14

My friend is running a server he wrote in C that is listening on port 52525. He runs a Java client on the same machine that opens a connection to "localhost" and the same port and then tries to send ...
0
votes
0answers
11 views

Sudo, nohup and spewing detached processes

I have a jar file that I need to routinely kick start from the terminal, and needs to be run as root. I'd also like to leave that terminal open for use, so I'm using this bash script: $ cat ...
0
votes
1answer
17 views

Unable to launch Topcoder IcedTea Arena in ubuntu 14.04

I was able to start the arena last week. I had jdk version 7 in my system. Yesterday, I installed oracle java version 8 to install Android Studio. From then on, I am unable to launch topcoder arena. ...
1
vote
1answer
15 views

Jar print convert and print “$?” to 0

I have a clipscode which I want to insert in my database I wrote a Java prog for that and it is running fine in eclipse IDE if my clips code contains "$?" it preserved as it is in eclipse IDE. see the ...
0
votes
1answer
18 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? ...
0
votes
1answer
56 views

Trying to install Java JDK from their SE Downloads page. Don't know how to use tar.gz

So I am trying to install Java JDK in a more difficult manner I know. But I want to understand what I am doing. I have the tar.gz file downloaded from here. Now I used tar -xzf ...
0
votes
0answers
13 views

Multiple versions of Java on Ubuntu

My end goal is to run Diffkit http://www.diffkit.org on ubuntu 14. JRE 7 is not supported, so I am installing JRE 5. I followed the instructions in an existing answer Downgrade Java 1.7 to Java 1.5 ...
0
votes
0answers
14 views

Install OpenCV 3.0.0 on eclipse - Ubuntu 14.04 32bit

I am trying to install OpenCV 3.0.0 on eclipse. I followed this guide to build OpenCV and now I am trying to install it on eclipse using this guide. The problem is, there is no Java folder inside the ...
0
votes
0answers
28 views

Trying to install minecraft, and every time i put in “sudo apt-get install minecraft-installer” i get Whats below, plz help [closed]

Reading package lists... Done Building dependency tree Reading state information... Done minecraft-installer is already the newest version. The following packages were automatically installed and are ...
2
votes
3answers
35 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
24 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
11 views

Suitable Java Binary not found

I installed OMEGAT and while trying to run the application from terminal following error was displayed:Suitable Java Binary was not found. Where is java binary located and how am I suppose to ...
-2
votes
0answers
20 views

My pc not working properly 14.04

Every time my pc facing an internal error (Kernel oops). I have attached the photos below check it my android studio and java not working properly. Always outof memory error 8GB - Ram Intel - i7 ...
0
votes
0answers
17 views

There is no make file executable in the permissions tab in the file manager? [duplicate]

I am trying to run a jar file. I have installed JDK 7 and have set the jar file to run with JDK 7. I am trying to make the file executable. When I look in the permissions tab there is no box that says ...
0
votes
1answer
281 views

which java se to download for linux

1 . i went to oracle site but i don't understand which Java to choose ! Linux ARM 32 Hard Float ABI 77.71 MB jdk-8u71-linux-arm32-vfp-hflt.tar.gz Linux ARM 64 Hard Float ABI 74.65 MB ----- ...
0
votes
1answer
33 views

How to update to latest Java JRE 71? [duplicate]

I installed the java jre via my package manager and get this version: $ java -version java version "1.8.0_66" Java(TM) SE Runtime Environment (build 1.8.0_66-b17) Java HotSpot(TM) 64-Bit Server VM ...
0
votes
0answers
16 views

Java Installation error

Below error is comes when i install new software ............ this error comes because i deleted java folder directly ..... help me to remove this error Do you want to continue? [Y/n] y (Reading ...
0
votes
1answer
19 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
2answers
38 views

Minecraft Server keeps crashing out of memory, but stil empty swap left

I am trying to run a spigot server on my ubuntu vps (openVZ). The problem is that I receive "Killed" messages that shuts the server down. After a bit research i found out that there is not enough ...
0
votes
0answers
9 views

Ubuntu 14.04 How to launch java application to occupy entire screen

I want to launch my java application so it appears on top of the desktop over the top of the icon bar on the left. Question is how?
0
votes
0answers
11 views

Problem with adding Tomcat server to spring tool suite in Ubuntu?

I ma trying to add Tomcat server in to STS but I do am not able to do it. Some times the server name doesn't appear when I try to add Tomcat by selecting it from the list, I can't type in the server ...
0
votes
1answer
24 views

Properly set up java development environment

I am a java developer mainly coding on win environment. I am planning to move to Ubuntu and I would like to know what is the best way to setup my jave, ide, maven and others. Under Windows I would ...
3
votes
1answer
26 views

cannot build Java programs in Geany Editor?

Something error with Geany cannot build java programs. when i click on build i get output like :- make: *** No targets specified and no makefile found. Stop. PS: Nothing problem with JDK. Run ...
0
votes
0answers
16 views

How to set PidFile for systemd from forking java application

I'm using a debian and a ubuntu machine that is using systemd. I would like to set up a forking systemd service for a java application (an OSGi container). Normally I use a script where I call the ...
1
vote
0answers
42 views

Downgrade java from 1.7.0_91 to 1.7.0_79 on ubuntu

my ubuntu machine contains java 1.7.0_91. how to install java 1.7.0_79. how to Downgrade java from 1.7.0_91 to 1.7.0_79 on ubuntu java -version output: java version "1.7.0_91" OpenJDK Runtime ...
0
votes
1answer
20 views

crontab java process information

I try to get a bash script running that should output the java process information to a file. Unfortunately when I add it to the crontab -e the script is not executed. As user root the script is ...
0
votes
1answer
29 views

Minecraft Won't Boot

I installed Java 8 from the java.com, and I got Minecraft from minecraft.net. But Java will not boot the game! I have clicked on the "run as a program" button and it stays checked, but it never does ...
0
votes
0answers
22 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
23 views

ubuntu tomcat7 Java RESTFUL Web services

I am having a configuration issue, and I can't figure out what is wrong. From Amazon (AWS), I created a virtual server on their free tier using the standard ubuntu image. This is running ubuntu ...
0
votes
0answers
16 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
1answer
115 views

Need help “sudo: add-apt-repository: command not found”

There are lots of "add-apt-repository" posts out there, but I think I have seen and tried the solutions in most of them. I am trying to install Java on Ubuntu Server 12.04. Some searching lead to the ...
0
votes
0answers
32 views

I am trying to install . exe file with wine and getting error “unable to find JRE 1.5.0 or later version in your system”

in the errors.log it says this : "Sat Jan 16 21:08:16 2016 Unable to find JRE 1.5.0 or a later version on your system. Sat Jan 16 21:08:16 2016 Please install the JVM and re-start this installer." i ...
0
votes
0answers
18 views

Android Studio 1.5 on ubuntu 14.10 AVM manager; Can't select “next” on System Image screen

I installed Android Studio from ppa:paolorotolo/android-studio without any noticeable trouble. After downloading java from ppa:webupd8team/java and helping Gradle to find it, I started on my first ...