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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Matlab Running error

I have successfully installed and activated the Matlab R2013a and after opening it via terminal, terminal shows this error, Warning: Unable to load Java Runtime Environment: libjvm.so: cannot open ...
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1answer
31 views

Java Web option is not available in NetBeans 7.0.1

I have installed NetBeans 7.0.1 from the Ubuntu Software Center, but when I go to create a project then the Java Web option is not displayed in the popup. Please give me an idea for how to solve this ...
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1answer
44 views

how to run servlets in XAMPP server

I had installed xampp in ubuntu 14.04. now i want to have servlet functionality. I searched in net, everyone saying use the tomcat but i want to do it in xampp is it possible if yes how to do that ...
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1answer
47 views

ERROR 403: Sorry, not allowed to fetch that type of file: jdk-7u80-linux-x64.tar.gz in 14.04 [duplicate]

I have had oracle's jdk7 installed on my 64bit Ubuntu 14.04 now for some time and it has behaved as expected. However lately all my updates has ended in errors and after some research I found the ...
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2answers
49 views

Uninstalling Java which is installed via PPA [duplicate]

I installed Oracle Java 8 via PPA. Once java tried to update via the update manager but got corrupted due to a network issue. Now it seems like java is having some memory leaks so I would like to ...
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4answers
94 views

Can't Execute jar files

I'm having trouble opening jar files because there is no java runtime in open with listed. Even I have installed it via Software Center(i also try to reinstall it via synaptic and i do a --purge via ...
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3answers
155 views

What is an origin and solution for “port 9000: Connection refused” error?

I am stuggeling with port 9000: Connection refused error. I work on Ubuntu 14.04 and faced the problem when trying to run Hadoop in a non-distributed mode, as a single Java process (compare Hadoop ...
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0answers
24 views

Openjdk runtime 7 Show up

I just installed Lubuntu 15.04 yesterday. When I go to run a game that uses java it just shows two archive managers and winetricks. So I thought that maybe the second archive manager is just a ...
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109 views

how to get openJDK7 and Technic launcher to work on Ubuntu 15.04

I just installed Ubuntu 15.04 on my daughters computer. Now we cant get Technic launcher to work for her. Then she wants to play minecraft modes. I download the Tech jar file and marked it as open as ...
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votes
2answers
1k views

Problem running jar from gui in 15.04

I updated ubunut to 15.04 today. Now when I try starting a jar file from the gui it only opens the archive manager. Checking the open with tab in Properties I can't find Openjdk. I got both Openjdk ...
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0answers
264 views

Firefox won't run java after installing 15.04

I installed ubuntu 15.04 yesterday. Firefox will not run the race viewers at igpmanager.com which use java. Ran java version and it returned the latest version of java. This machine is running an SSD ...
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vote
2answers
49 views

How to open Minecraft.jar? [duplicate]

I'm having trouble opening Minecraft.jar because there is no java runtime in open with listed. Even though I have installed it. This seems to be the solution JRE not showing up in "Open ...
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1answer
126 views

removing jva openjdk 7, ubuntu 15.04

Can I safety remove OpenJDK 7 from my system? I've got OpenJDK 8 but I've found this: I suppose you are using 12.10 or 13.04. Here default-jre depends on openjdk-7-jre. So you can't remove ...
3
votes
3answers
610 views

Message on each startup of Java after upgrade to 15.04

I just upgraded to 15.04 and noticed that on any Java program launched, the message Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar is printed to the console (which did not ...
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1answer
68 views

Removing Oracle JDK and re-configuring update-alternatives

Please check the scenario below: sudo update-alternatives --config java There are 5 choices for the alternative java (providing /usr/bin/java). Selection Path ...
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0answers
15 views

could not write bytes broken pipe 12.04, after installing java and rebooting the system

I removed all java packages by following the instruction through the link How to uninstall java and installed java 8 through this link How to install java 8 and restarted the system after that time ...
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vote
2answers
153 views

Running into an error while installing Android Studio

So I am working on installing android studio onto Ubuntu 15.04. I followed the guide here at http://android-er.blogspot.com/2014/07/install-oracle-jdk-8-on-ubuntu-1404.html to install the JDK and ...
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0answers
24 views

freeplane starts only from terminal, not from GUI

The title explains pretty much all I know about the problem. Basically, when I click on the freeplane desktop icon or if I double click on a freeplane file, nothing happens. Instead, launching it ...
1
vote
1answer
85 views

java plugin is not working

I want to run following website in chrome/firefox in my ubuntu : http://bikecad.ca/quickapplet which shows following message: However i have already followed these steps but its not working. Help ...
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0answers
14 views

Disable Auto Update JDK 7 Ubuntu 14.04 [duplicate]

I have installed JDK 7 in Ubuntu via following commands sudo apt-get install python-software-properties sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install ...
2
votes
1answer
33 views

How to use GTK/GNOME notifications services in Java?

I've started learning Java and to have some project to actually put knowledge to the practice, I decided to make a custom notifications service. I know that Java is not the best option, but that's ...
1
vote
1answer
45 views

OpenForis Calc / embedded Tomcat won't start

Trying to run OpenForis Calc, embedded Tomcat instance fails. Error seems to appear here: Apr 17, 2015 2:13:47 AM org.apache.catalina.startup.HostConfig deployDescriptor INFO: Deploying ...
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votes
1answer
56 views

ERROR Tomcat: Apache - Java - Tomcat - Catalina [duplicate]

I am trying to run a software (HTML based) and when Tomcat runs to open it, I get the following messages: The APR based Apache Tomcat Native library which allows optimal performance in production ...
1
vote
2answers
79 views

Javafx is not on the default classpath even with Oracle JDK 1.8

I recently installed Oracle JDK 1.8 on my Kubuntu Linux machine following this guide. I did the manual install because I couldn't get the easy one to work. If I've understood correctly, javafx should ...
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votes
2answers
48 views

unable to install OpenJDK Java 6 runtime

Please mind im fairly new to linux so please try to keep the technobabble to a minimum. So in the ubuntu software centre i tried to install the java 6 runtime and it gave me this error message The ...
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0answers
51 views

Is there a way to install jHipster on Ubuntu 14.04?

Can you give an advise is it possible to install jHipster on Ubuntu 14.04? Yesterday I try to do this by following regular routine on the jHipster site but got a lot of errors. After I start to ...
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votes
1answer
68 views

Problem while installing oracle-java8-installer

I am trying to install Oracle's Java8, but I get the following errors. How can I fix those? Translated from Spanish. For original text, please see the revisions. r06xd@uers1-H61MLV2:~$ sudo apt-get ...
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0answers
70 views

Matlab 2014a install on Ubuntu 12.04 Issue

When trying to run the install script I get this error message: Preparing installation files... Installing... /tmp/mathworks_1095/sys/java/jre/glnxa64/jre/bin/java: 4: ...
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votes
1answer
98 views

Why does java not work in chrome in ubuntu? [duplicate]

I know it doesn't work, and I just want to know why.
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0answers
33 views

Ubuntu, JavaFX, A fatal error has been detected by the Java Runtime Environment

I have already asked this question here: link to StackOverflow I have installed Ubuntu 14.04.02 x64, oracle JDK 1.8.4 and I try to run JavaFX8 project but I get this message in eclipse(not every time ...
2
votes
1answer
93 views

Maven: JAVA_HOME is not defined correctly

I've installed and configured Maven and Java. I can successfully run mvn spring-boot:run But when I run sudo mvn spring-boot:run I am getting Maven: JAVA_HOME is not defined correctly When I ...
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votes
0answers
24 views

Android SDK Manager slf4j error

I'm using Ubuntu 14.04 and want to run Android Studio. I have installed everything needed based on tutorials such as Java, Android-SDK-linux, etc. I set the environment variables in .bashrc and ...
1
vote
1answer
225 views

WebEx error: Java is not working

I am trying to join a WebEx meeting. However, when I try to do that, it gives me an error: Java is not working. To have the best experience joining meetings, Java must be installed on your ...
0
votes
1answer
46 views

Unable to run Gephi 0.8.2 on Ubuntu 14.04 LTS 64-bit

I know there are some discussions on this topic already, but none seem to work for me. I have the Java JDK installed: java version "1.8.0_40" Java(TM) SE Runtime Environment (build 1.8.0_40-b26) ...
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votes
2answers
102 views

Installing Java 8 and Setting environment variables

I just completly shifted to Ubuntu from Windows 7. I am a java developer and now I need to install Java 8 JDK and JRE. I installed 64 bit ubuntu 14.04.02 and it seems like there are lot of ways to ...
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0answers
26 views

Error stopping tomcat7

I'm trying to install tomcat7 and I get the following error when I try to stop it. This occurs after I add webapps to server.xml. jaramillo@jaramillo-HP-455-Notebook-PC:~$ sudo /etc/init.d/tomcat7 ...
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votes
1answer
176 views

Install or run FlashTool?

Okay, I've downloaded "flashtool-0.9.18.5-linux.tar.7z" from the Xda Forums ( http://xda-forum.blogspot.nl/2015/03/how-to-install-xperia-firmware-using.html ) and I have tried to run "x10flasher.jar" ...
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votes
1answer
55 views

How to make jar file executable from anywhere without root permission

I made a jar file and now want to execute it from any directory. To do that I simply put it in /bin and made it executable, but I am not able to execute it and get this output error: Error: Unable to ...
0
votes
1answer
46 views

How to install Hadoop on Ubuntu 12.04 32-bit?

I want to install hadoop on my Asus laptop running Ubuntu 12.04. When I tried to format the new File system, at that time I got an error 1. $ hadoop namenode -format or 2. $ hdfs namenode ...
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votes
0answers
30 views

Ubuntu crashing too often

right some little days, I bought a dedicated server (physically, I mean), then, installed Ubuntu 12.04 LTS. All working well (well as it can be taking in mind that it's running in a simple house, ...
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votes
2answers
16 views

Minecraft Voltz Server Error

Hello I have run multiple servers before including voltz, but these last few days I haven't been able to get this server to run on my Ubuntu server 12.04 for some reason every time I start it I get ...
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votes
1answer
78 views

Cannot install octave on Ubuntu 14.10

I try to install octave on ubuntu 14.10 by $ sudo apt-get install octave Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be ...
1
vote
1answer
31 views

New shell terminal points to different bash_profile [closed]

When I launch new terminal it points to some different bash profile. Here in my $PATH are set to default, $JAVA_HOME is blank When I source my .bashrc and and .bash_profile located at home then I am ...
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votes
0answers
22 views

My Eclipse Won't Open

I'm a bit of a linux noob and my eclipse wont open. I'm using ubuntu gnome 14.10. I have tried reinstalling and reinstalling java 7 and 8. It worked once.
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vote
2answers
27 views

How do I find the path to the 32bit version of java on 64bit Linux?

I've installed a 32 bit version of java on my 64bit system to get Juniper VPN to work. What command line command will allow me to find the path to the 32 bit version of java?
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0answers
35 views

Can't install program using terminal

I got this problem when I trying to install java and netbeans package and internet download manager softwares. I download these files from their websites And try to use command chmod +x ...
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votes
1answer
111 views

Minecraft crashing, 14.04 LTS

Installed openjdk and minecraft, but it keeps crashing. Error as follows. I'm a complete ubuntu noob. A detailed walkthrough of the error, its code path and all known details is as follows: ...
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vote
1answer
62 views

How to make an export DISPLAY?

I'm execution a Java project on a distant server. My project generates a graphical interface. Here is the shell script that I'm executing on the server side : export ...
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0answers
62 views

Setting JAVA environment variable [duplicate]

I am setting up new Ubunut machine. Stuck on setting up Java environment variable. I have tried all possible way and whatever solution I found here. None of them worked. It is still giving me blank ...
1
vote
1answer
39 views

Can't set arguments in Eclipse to define Tomcat

I've downloaded Eclipse Luna and Tomcat 7 in Ubuntu 14.10. I put them into my user folder. Eclipse in Eclipse folder and Tomcat 7 in Tomcat folder. So when I try to register a argument in my Tomcat 7 ...