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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3answers
29 views

Minecraft doesn't run; I do all the things to fix it, but it doesn't works!

No OpenJDK 7 Java Runtime on the dialog box. Done fixing this. Here's my Java version. I'd just reformatted my PC because there's problems in the last Ubuntu installation but Minecraft works ...
2
votes
0answers
12 views

Increase and decreasing screen brightness crashes Minecraft

Problem: When increasing or decreasing the screen brightness, Minecraft crashes and to an extent freezes my computer UI. What I mean by to an extent is that I can move the cursor around, but I can't ...
0
votes
0answers
17 views

java based application not working

I hava a tar file of java based application,though I installed open jdk on my system but still when I decompressed the file and try to open executable file,its not opening. I tried the same thing on ...
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votes
0answers
6 views

Saving Uploaded Files to Server from Tomcat

I'm running a web app on Tomcat7 on Ubuntu. I can upload a file, however I want to save the file on a temp directory on the server (not in the Tomcat directories). I guess my Tomcat server is ...
1
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0answers
10 views

Unable to execute java programs on ubuntu 14 studio lite

I recently installed ubuntu 14.04 studio lite 32 bit. I have java apps that I created using netbeans 8/open jdk 1.7. They run fine using the netbeans debugger. However when I create the tar, it can't ...
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votes
1answer
17 views

Java install does not work

I am unable to run java after installing it. I'd appreciate troubleshooting help. Info: ⠀Ubuntu 14.04 LTS ⠀Acer Aspire V5 with AMD A4 processor ⠀Used Oracle 64-bit Linux version ...
1
vote
1answer
20 views

java say only speaks the first word

I have the following code: public class ChatSystem { public static void main(String[] args) { SpeakCommand sp = new SpeakCommand("hello master! How are you feeling today?"); ...
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votes
3answers
27 views

How to Verify JAVA_HOME path

I installed java in opt/jdk1.7.75 having following directories--> bin db include jre lib man COPYRIGHT LICENSE README.html relase & other files I set JAVA_HOME path in .bashrc file as follow: ...
1
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0answers
55 views

Three different Eclipse versions all crash with BadWindow on 15.04

I have a complete fresh install of XUbuntu 15.04 on a Dell Laptop with an Intel Graphics-Card. I installed eclipse (see below which versions I tried and from where) and I'm able to start it. But ...
0
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0answers
13 views

What is the application None?

As the title, what is the application None? Sometimes I'm experiencing bugs with the unity menu bar of eclipse. In this short video I show what the problem is; at 10'', a report bug opens (you can ...
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votes
0answers
14 views

Instaling, and programming application for java [on hold]

I have one virtual machine that runs ubuntu and when I access it all I have is this: cwd: ~/workspace: where I type commands, Since I know how to program in Java i have instal java on that ubuntu ...
0
votes
0answers
10 views

Netbeans for Ubuntu not responding to horizontal touch pad scroll

I am using Netbeans v 8.02 with Ubuntu 15.04. I am facing a problem with horizontal scroll using touch pad it's working great with other application like (Chrome, Firefox ... etc) except when I try it ...
0
votes
3answers
46 views

How to create desktop shortcut to bash program running java

I've downloaded the free and open-source image analysis software "Icy" (http://icy.bioimageanalysis.org/), and I can launch it by making the "icy.sh" file executable and double-clicking on it. ...
0
votes
1answer
32 views

Some jar files refuse to to run upon double-click and Terminal can't access them

MultiMC launches with no problems. I can't get Minecraft to launch by double-clicking it: it will open in Archive Manager. When I run the command java -jar minecraft.jar, Terminal returns the error ...
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votes
0answers
27 views

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 ...
0
votes
1answer
25 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 ...
0
votes
1answer
22 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 ...
1
vote
1answer
27 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 ...
1
vote
2answers
39 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 ...
0
votes
4answers
50 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 ...
1
vote
3answers
113 views
+100

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 ...
-2
votes
0answers
19 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 ...
0
votes
0answers
20 views

Updating Java8 JDK [closed]

Ok, I know this problem has been asked countless times and there's several different ways to get this done, but I'm running into an issue I'm not entirely sure how to correct. To this point, I've ...
0
votes
0answers
62 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 ...
0
votes
2answers
350 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 ...
1
vote
0answers
150 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 ...
0
votes
0answers
18 views

Not Connecting to MySQL database on server [on hold]

I am trying to connect to a database with the Help of SQLWorkbench/J, all the information that I have entered is correct, but I don't know how to set the URL. The URL which I am using is ...
1
vote
2answers
24 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 ...
0
votes
1answer
71 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 ...
1
vote
2answers
159 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 ...
0
votes
0answers
25 views

Running Crouton for Chrome OS, Problem with X11 Forwarding? [on hold]

I am currently using a Ubuntu based crouton to run linux on my chromebook so that I can code using Java and its applications. Coding, compiling, and running java works for me as of right now. ...
1
vote
1answer
53 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 ...
0
votes
0answers
9 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 ...
1
vote
2answers
91 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 ...
0
votes
0answers
21 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
56 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 ...
0
votes
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
22 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
35 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 ...
0
votes
1answer
33 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
54 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 ...
0
votes
2answers
36 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 ...
0
votes
0answers
41 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 ...
0
votes
0answers
43 views

Problems while executing a JAR file

I'm using Netbeans to build a project developed by someone else. When I run the project in Netbeans, it works properly. When I build the project and I try to execute the jar file generated from ...
0
votes
1answer
49 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 ...
0
votes
0answers
39 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: ...
-1
votes
1answer
83 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
17 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
58 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 ...
0
votes
0answers
22 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 ...