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 ...

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Build hybris code on ubuntu

I receiving below error while building hybris code on ubuntu. earlier I was able to build same code on ubuntu machine but i have created newly machine i m not able to build code due to below error. ...
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0answers
8 views

Why Does Ubuntu Ship Down Level Java JRE

Even on Daily Builds of Ubuntu 16.04, Java incorporated on all builds is less than current GA Supported Version 8. Manual Installation of Java 8 requires a rather lengthy 175MB archive download. Why ...
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1answer
26 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 ...
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1answer
13 views

How to install sbt in its latest version in Ubuntu 14.04?

I am facing this Spark problem, after installing sbt like this. How to proceed please? When hitting tab to this: sudo apt-get install s I do not see any sbt package.
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0answers
17 views

Executing .sh file for Vassal engine returns “java: file not found”

I just installed Ubuntu, after having used Linux Mint for a year or two. I was hoping to install and use the Vassal strategy game engine (from vassal.org), which worked fine in Mint LMDE. However, ...
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1answer
26 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$ ...
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0answers
6 views

Can't import Eclipse project in Netbeans

When I'm trying to import an Eclipse project to Netbeans in Ubuntu it gives me the following error
44
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3answers
228k views

How to set default Java version?

I have followed all the instructions stated at this question, but am encountering some problems with the last part of it. I actually have version 6.22 of java and would like to update to version ...
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1answer
16 views

How to make shell script restart Java if any thread crashes?

I have a multi threaded Java program. Ideally it should run once and successfully terminate. Unfortunately, sometimes one of the threads crashes, such as by throwing DivisionByZeroException. Since ...
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0answers
10 views

Oracle JAVA IDEs freeze

I experience a freeze since few months. I'm using Phpstorm and since june I has to downgrade java (oracle, phpstorm can't work with openJdk) jdk from 8 to 6 to avoid a freeze when the IDE is indexing ...
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votes
4answers
10k views

phpStorm losing keyboard input

Every now and again phpStorm will lose input from my keyboard. I can still click around, but it will not register any keys. Other windows are fine. It takes a phpStorm restart to bring them back. It ...
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0answers
160 views

OpenJDK 1.7 does not install on Ubuntu 14.04 LTS

The OpenJDK 1.7 JDK cannot be installed on Ubuntu 14.04 LTS. The machine is running on AWS sudo apt-get update sudo apt-get install openjdk-7-jdk results in: the following packages have unmet ...
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vote
1answer
18 views

Running LanguageTool

I am trying to run LanguageTool in the current version 3.2 with Ubuntu 15.10. What I get with java -jar /opt/LanguageTool-3.2/languagetool.jar is Exception in thread "main" ...
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2answers
30 views

How i can run java from terminal? [on hold]

I've copy the java from downloads folder to the bin folder and I've tried so many ways to set it. So can just type java in terminal. But it always not working. Please help me.
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vote
1answer
4k views

Apache Tomcat webapps have to use a proxy

I've installed Apache Tomcat and want to use a proxy for my webapps. Some apps request data from the internet, they don't have an own/internal possibility to use a proxy. I added the following lines ...
10
votes
3answers
12k views

How to create a service on Ubuntu Upstart

I have a Java executable program that I can run by typing java -jar abc.jar in terminal. How can I run it as a service? I want to run it as a service like by typing service abc start.
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3answers
28 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 ...
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0answers
16 views

HBase and Java_HOME

I have set JAVA_HOME. Nevertheless HBase doesn't recognize it. vagrant@precise32:/usr/local/hbase-1.0.3$ echo $JAVA_HOME /usr/lib/jvm/java-1.7.0-openjdk-i386 vagrant@precise32:/usr/local/hbase-1.0.3$ ...
2
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1answer
116 views

java -version pulling up wrong version

First off I'm using Ubuntu 14.04 I was following this video to set up a Java JDK and at the end he uses java -version to see his current version number. The Version I installed was 1.8.0_66 but ...
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2answers
17 views

Eclipse is not running in ubuntu 15.04 [on hold]

Currently i am trying to install eclipse in Ubuntu 15.04. I followed this link http://thelinuxfaq.com/471-how-to-install-eclipse-ide-on-ubuntu-linux-15-04-14-04 When i click on the icon, eclipse is ...
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0answers
19 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). $ ...
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0answers
55 views

sudo apt-get install showing error

sudo apt-get install shows the following error: Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 2 not ...
-2
votes
0answers
15 views

Geany with java problem [on hold]

I tried to program in java gui in geany and everything seam good unit i got this error massage "method Container.setLayout(LayoutManager) is not applicable" and i notices that .set Layout with ...
0
votes
1answer
13 views

Why is this apt configuration necessary for installing Java on vagrant?

Here is my bootstrap.sh apt-get update apt-get install -y python-software-properties add-apt-repository -y ppa:webupd8team/java echo oracle-java7-installer shared/accepted-oracle-license-v1-1 select ...
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votes
1answer
24 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. ...
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1answer
43 views

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

I have installed the oracle Java 8 and configure it. cmd-> echo $JAVA_HOME /usr/lib/jvm/oracle_jdk8 cmd-> echo $PATH ...
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votes
1answer
30 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 ...
0
votes
1answer
17 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 ...
96
votes
1answer
296k views

How to install Oracle Java on Ubuntu 14.04? [duplicate]

I am using Ubuntu 14.04.1 LTS, x64 architecture, and I specifically need to install Oracle Java. Now I know there are some instructions on the website which I follow but the same website does not ...
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votes
0answers
19 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
41
votes
3answers
30k views

Gradle in Ubuntu

It appears that Ubuntu doesn't have new versions of Gradle in their repositories for some reason. I need it for a project that will be build by Launchpad. What should I do about this?
0
votes
0answers
14 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
1answer
4k views

Eclipse not launching

I have installed Ubuntu 14.04, I have installed Eclipse using Ubuntu Software Center. But Eclipse is not opening, when I click it is not opening or showing any error message it is very silent. Output ...
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0answers
32 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 ...
2
votes
5answers
505 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 ...
14
votes
5answers
77k views

How to find my current JAVA_HOME in ubuntu?

How to find my current JAVA_HOME in ubuntu? I have to set java_home path when installing maven.
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votes
1answer
4k views

Minecraft Launcher Crashing

I just downloaded Minecraft on Ubuntu 12.04 lts. The launcher opens, but when I click play, it crashes and reopens with this error report. ---- Minecraft Crash Report ---- // Surprise! Haha. Well, ...
37
votes
8answers
77k views

'tools.jar' is not in IDEA classpath

I am a new user of Linux, it has been recommended to me by my friend. He told me to install software called IntelliJ Idea IDE. Well I have been following the tutorial. But now when I try to open ...
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:
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0answers
13 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?
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votes
1answer
28 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 ...
408
votes
25answers
650k views

How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE?

I want to install Oracle's JRE and to update to the latest version with the Software Updater when they released. Is there a Ubuntu package that is provided by Canonical or Oracle? Before release Java ...
0
votes
0answers
25 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 ...
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votes
1answer
48 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?
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votes
1answer
35 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 ...
47
votes
1answer
125k views

How do I update Oracle Java 7 (JDK and JRE)

Recently, I've installed JDK 7 from the Oracle site, using these instructions. Now, I'm wondering what is the correct method to update it (or, better, to keep up-to-date automatically)? For instance, ...
0
votes
2answers
6k views

how to concatenate two strings in shell script in 3.13.0-34-generic kernel

I want to concatenate two strings for the shell file im getting error when i have created the shell file in following manner could you please suggest how to get it set export ...
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0answers
40 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
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0answers
29 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 ...
10
votes
3answers
16k views

How can I uninstall oracle java 8 and install oracle java 7 instead with webupd8 installer?

I installed oracle java 8 by typing in terminal: sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java8-installer but now I want to uninstall oracle ...