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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openjdk-7 gdb list main.c sources error

I'm currently struggling with debugging openjdk in Trusty Tahr. I already installed opejdk-7-jdk openjdk-7-dbg. When I issue gdb java I see it reads the symbols properly, but when I ask to list the ...
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1answer
7 views

Can't find window builder on ubuntu

I am searching for window builder in eclipse.Learning JAVA.Can anyone help me about this??
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2answers
53 views

Installing java 8 on ubuntu

I am trying to install Java 8 on Ubuntu. Due to restrictions on download at my work place, I cannot install using apt-get. Hence, I downloaded the archive from Oracle's website, named ...
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0answers
19 views

Bash question with system processes? Stopping and renicing “Java” processes

I play minecraft on linux, and I would like to make a Bash script that does two things. First, I would like it to close the minecraft launcher's process. Secondly, I would like it to renice the ...
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0answers
7 views

Ugly fonts in Java Swing Applications even with openjdk-fontfix

I have a problem with Java Swing applications such as Intellij Idea or Pycharm. I use Ubuntu 14.04 with openjdk-fontfix and jayatana PPAs installed. All fonts in Pycharm, for example, are rendered ...
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1answer
20 views

/usr/bin/java working only with sudo

I hope you can help me with the following problem. I have a problem with installing oracle jdk. After installing using update-alternatives: sudo update-alternatives --install "/usr/bin/java" "java" ...
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1answer
11 views

Installing Tomcat in ubuntu

I have download apache-tomcat-x.x.x.tar.gz from apache . I have extracted it and set the CATALINA_HOME. Have given permission to all the sh file to bin. While running catalina.sh jpda start, then I am ...
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0answers
12 views

Hadoop gives Error localhost: Error: JAVA_HOME is not set.?

I'm using Ubuntu. I have installed Java Hadoop configured it as single Node. i have also added environmental variable named HADOOP_HOME,JAVA_HOME in .bashrc file. When i was trying to run Hadoop using ...
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1answer
30 views

I have java web application i want to put it on web(public internet) how i can do it [on hold]

I have created one java web application i have it in netbeans and iam using tomcat application server. It's got deployed on localhost but i want to put it on internet so anyone can access it. please ...
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2answers
31 views

Open Java program from SSH into VNC display

If I have an Ubuntu 12.04 system that has LXDE and TightVNCserver installed and run a session on port :1 (not tunneled through SSH) and an active SSH connection, then how can I use SSH to start a ...
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1answer
27 views

Java installation error using apt-cacher

I'm getting this output when I trey to update/install oracle-java7 or from webupd8 ppa: Downloading Oracle Java 7... --2014-11-19 16:35:02-- ...
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1answer
23 views

I can't install openJDK 7 in ubuntu 12.10 (32-bit)

Using Ubuntu Software Center I tried to install OpenJDK 7 but got the following notification. **Package dependencies cannot be resolved** This error could be caused by required additional software ...
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0answers
16 views

The installed java is version 7u65, yet the ubuntu package is 7u71, why the discrepancy?

I'm running Ubuntu 14.04 and need to use Java 7 update 71. It seems like openjdk has been updated in the Trusty repos to update 71, yet even if I install the update java seems to still be at version ...
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1answer
44 views

IcedTea Doesn't Run Properly in Firefox

I have Java 7 installed for Ubuntu 12.04 and I have IcedTea installed in Firefox (33.0). Some Java plugins are not working correctly. For example: starting from the IcedTea-Web-Tests (see the IcedTea ...
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0answers
36 views

Unable to locate package oracle-java8-install [closed]

I'm trying to install java on Ubuntu 13.04, and nothing is working. $ sudo add-apt-repository ppa:webupd8team/java $ sudo apt-get update $ sudo apt-get install oracle-java8-installer This produces ...
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0answers
25 views

Error: Could not find or load main class org.apache.pig.Main

When I try to move on into pig local mode, this kind of error occurs: "Error: Could not find or load main class org.apache.pig.Main" Anyone there to solve this issue?
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1answer
54 views

Java Download for Ubuntu 14.04 [duplicate]

I needs help actually i am trying to download java and eclipse. How can i download java for Ubuntu 14.04.
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0answers
129 views

ubuntu 14.04 64bit Matlab 2014b installation

i tried now for days to install matlab 2014b on ubuntu14.04. but it never worked, i am now in a situation where i dont know where to look and search for. my error messages when i want to run the ...
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1answer
21 views

SIGBUS error with JRE when using eclipse

I encountered a SIGBUS error when starting up eclipse. There was nothing wrong before this, I've just turned on the laptop and the error appears: $ eclipse # # A fatal error has been detected by the ...
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0answers
13 views

can I use same system for the implementation of multicast?

While implementing multicasting in java socket programming,,I decided to make groups based on the interfaces I have ,for eg: anupam@JAZZ:~$ netstat -g IPv6/IPv4 Group Memberships Interface ...
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votes
3answers
63 views

Eclipse crashes after upgrade from Kubuntu 12 to Kubuntu 14.04 [on hold]

I 'upgraded' from 12.04 to 14.04 and I'm having a problem .I can't seem to fix with eclipse. Specifically, eclipse crashes... consistently. I've looked over the web for a few days and I can't seem to ...
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1answer
33 views

How much space do i need for ubuntu dualboot?

I'm using windows 8.1 and i want to learn linux and also want to use it for java and clojure development. I'm gonna use IntelliJ IDEA or Eclipse. How much space i need to save on my localdisc for ...
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0answers
18 views

encoding in ubuntu 14.4 [on hold]

I am learning java ( from Horton's Beginning Java). My problem is finding an editor whereby I can view in proper format java's charBuffer chars which are UTF-16. If I write say "Garbage in, Garbage ...
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1answer
39 views

Oracle Java 8 “This plug-in is not supported”

I had Java 7 working nicely on Ubuntu 14.04. Now I have Java 8 (and not Java 7) on a new installation of Ubuntu 14.04. I tried to use Java 8 for the first time today, including adding the URLs to the ...
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0answers
39 views

how to fix a port number statically for client request on client side?

I am on a Assignment to implement unicast multicast broadcast in java socket programming. While implementing multicast part I decided to do it on my own system itself, so for the purpose of ...
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2answers
128 views

Java game loop causing Ubuntu to freeze

I have been doing front and back end web programming for over a year now, and now I am trying to learn 2D game programming in Java. Based on various sources on the web as well as one from my friend ...
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0answers
16 views

Help Please. Im new to ubuntu and need help getting bluej to work

i downloaded oracle-jdk and bluej, then realized i could just use the openjdk. i click on the bluej-314.deb file and it took me to software center to download. then I try to open and nothing happens. ...
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1answer
16 views

Java process exceeds allocated ram and crashes VPS

I have a vps running ubuntu Ubuntu 14.04.1 LTS with Java version 1.7.0_65. I am running a minecraft server (I have attempted to use different jars for the server). I execute that jar using the ...
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0answers
15 views

TightVNC Server not working via Java Viewer at school

When I try to connect to my computer from school, which they have Linux computers with restrictions, I get this: java -jar '/home/alumno/Escritorio/carpeta sin título/tightvnc-jviewer.jar' nov 05, ...
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votes
2answers
170 views

How to have one browser with Flash and Java?

I can't run Java web apps in Chrome/Chromeium and I can't run Flash in Firefox (Both sites shown in images works in opposite browser) Is it possible for me, running Ubuntu 14.10 to use one ...
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0answers
11 views

copy the MySQL Connector/J jar file to the domain-dir/lib directory

Where is the MySQL JDBC connector JAR supposed to go? To do this, copy the MySQL Connector/J jar file to the domain-dir/lib directory. For example, copy mysql-connector-java-5.1.30-bin.jar to ...
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0answers
40 views

how to install and configure Glassfish 4

How do I install Glassfish 4.x and run it on port 80? While it's easy enough to download Glassfish and unzip it, should it go in a particular directory? Which user should start and stop the server? ...
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1answer
22 views

Recover only Java source code in photorec

I would like to recover only Java source code and XML files in photorec, but they are not listed on the list in the File Opt. There is Java class, but I'm not looking for files with .class extension ...
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0answers
27 views

Hard time on posting on Ebay

I'm trying to sell stuff on ebay and I'm having issue with JAVA "component" that doesn't work & I cant complete or save my listing. Chrome is a no go and firefox will open a java "popup" but with ...
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0answers
42 views

High CPU utilization

I have noticed recently a high CPU utilization in Ubuntu. It seems to occur often when I use Eclipse which is a java-based IDE, but I have noticed it occurring even when Java is not running. I have ...
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0answers
22 views

Message: JAXP00010001: The parser has encountered more than “64000” entity

I'm running CKAN.org on Ubuntu 12.04 LTS. Perfoming certain requests results in an error in the apache-log: [Thu Oct 30 13:51:15 2014] [error] [client 127.0.0.1] SearchIndexError: HTTP ...
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0answers
15 views

How to run a java program on boot [duplicate]

I wrote some java programs which run continuously to do some maintenance work. But I need to start them individually by screen java MyProgram I want them to start automatically on boot. I have read ...
0
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1answer
70 views

Installing Lubuntu Oracle 11gr2 for Practice

For the sake of education, my goal is to create a light Linux OS that can stay updated (for free) and run Oracle 11g and all its tools and also work with my wifi drivers. I tried using this guide to ...
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0answers
29 views

I have an Issue With Java! Scottrade! [duplicate]

My problem is that I downloaded a file with the the extension .jnlp . I have the necessary installed requirements Java Runtime Environment (JRE) 7 openjdk. When I try to open the necessary/required ...
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2answers
72 views

How to increase JAVA Heap Size?

I need to increase the default java heap size to get OpenNMS Linkd service running smoothly, and fortunately I have 4/5 of my total installed memory free at any given time even when their is maximum ...
0
votes
1answer
251 views

Oracle 12c Installation Error: “Exception … Could not initialize class sun.awt.X11.XToolkit”

I have been trying to install oracle 12 c on Ubuntu 14.10 but facing the below mentioned error.Could some one please check this and advise me how to fix this error? Checking Temp space: must be ...
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0answers
86 views

Eclipse Luna(4.4.1) can't find the JRE for jdk1.8u25

I recently installed jdk1.8u25. The java codes are working fine in the terminal but in eclipse it is not working. Can anyone give any solutions for this?
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2answers
52 views

Can't figure out how to run eclipse (missing JDK/JRE)

I'm very new to Linux and coding, I'm really interested in learning and really want to contribute to this process here at Ubuntu as soon as possible. I downloaded Eclipse Luna. When I try to run it ...
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0answers
51 views

Can't create Virtual Android Device in Ubuntu. Fatal error detected by JRE

I installed Eclipse and OpenJDK java 7. Ran the command android avd in terminal and then specified the specs for my virtual android device. Upon clicking 'OK' button. This is what it showed.! ...
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0answers
111 views

Android Studio doesn't render Ubuntu Mono Font well

It doesn't even recognise it as a Monospaced font. Then it only shows anti-aliasing when the font size is set to 20 or over. But for other fonts it does it at 16. The result is ugly looking fonts and ...
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1answer
226 views

ADT plugin Error says Location of the android sdk has not been set up in the preferences

I'm using Ubuntu 14.04. I've downloaded Eclipse Luna (4.4.1) and installed Android ADT plugin using this link https://dl-ssl.google.com/android/eclipse/ I'm getting error as 'Location of the ...
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1answer
124 views

Installing latest Java 8. Ubuntu 14.04. (Need Guide)

I need Java to log into my bank (passwords etc) http://java.com/en/download/linux_manual.jsp Recommended Version 8 Update 25 I am very new to Linux/Ubuntu. But i did follow a guide to use Terminal ...
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0answers
34 views

yEd shows no windows

I want to use the latest yEd graph editor on my machine with Ubuntu 14.04 running on it as the only OS. I downloaded yEd installer script for 64-bit Linux. Also: $ java -version java version ...
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0answers
15 views

Bootable pre configured live image - no installation on pc

I would like to build my own Ubuntu disc. I would like to make a disc like, "if you want to try Ubuntu before installation" What I need is, to make a pre configured disc with Java installed, and on ...
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0answers
35 views

How to Upgrade TomCat and Java Versions on Ubuntu Server 14?

I've Ubuntu Server 14 with TomCat 7.52 and Java 1.7.0_65. I'd like to upgrade TomCat to 7.56 and Java to 1.7.0_71. How can I do this? I want to update for example TomCat because going to manager ...