Java is a general-purpose programming language and a computing platform called the Java Virtual Machine (JVM).
1
vote
1answer
20 views
Can connect from RPi to laptop, but not other way around
I'm developing a server-client application (command-line based) in Java. I want to run it on my Raspberry Pi (RPi), but it turns out I can't login to my server-part from my laptop. The problem is that ...
0
votes
0answers
34 views
X high CPU when using Java applications
Only recently, my Freemind program has become extremely sluggish and unresponsive (big lag) when moving my mind map around. I use Arch Linux with xfce4. Freemind is made with Java. If I move the mind ...
0
votes
1answer
74 views
Alternatives not working well for Java installation on Centos 6.4
I am trying to installing on Centos java from Oracle. Following are my steps.
yum install /usr/local/jdk-7u3-linux-x64.rpm
alternatives --install /usr/bin/java java /usr/java/latest/jre/bin/java ...
0
votes
1answer
27 views
Red5 can't find JAVA_HOME
I'm setting up a Red5 server on Cygwin
I get this
/usr/share/red5$ sh red5.sh
Running on CYGWIN_NT-6.1-WOW64
Unable to locate Java. Please set JAVA_HOME environment variable.
However, I can also ...
0
votes
1answer
62 views
Java installation having issues on Centos java and javac showing different version
I have this package of java jdk-7u3-linux-x64.rpm. So I have been doing this normally yum install jdk-7u3-linux-x64.rpm. Then immediately I will do this
alternatives --install /usr/bin/java java ...
2
votes
2answers
43 views
Search class names in jars
I'm using this command to search *.jar files for java classes, and I only get the name of the jars that contain those classes:
grep -ral --include=*.jar SignonEJB .
How can I also get the class ...
1
vote
0answers
44 views
Java application locks up after playing sound
Our Java application plays short notification sounds periodically (in response to user actions). On some hardward, our application will lock up after the 3rd or 4th short sound. We have to pkill java ...
0
votes
1answer
80 views
Can't load IA 32-bit .so on a IA 32-bit platform
I'm trying to install an 32_bit_application on CentOS (64-bit), while running the setup.bin
file it return the following error
Invocation of this Java Application has caused an ...
-2
votes
1answer
54 views
Novice Ubuntu 12.04 user needs help! [closed]
I'm new to Unix/Linux and someone suggested I try Ubuntu. I like it but I can't figure a couple of things out and don't really have time to google up ways to solve the problem. Answers from a quick ...
2
votes
4answers
11 views
any feature on linux like Perfermance Counter on Windows servers?
I have a tomcat web application, when invoking an unstable remote API, I want to get realtime http request time at any time. On windows server, I can use Performance Counter, does centos provide ...
4
votes
3answers
101 views
Uniquely identifying java processes with same name
I have two java processes which run using the same file name, MyApp.jar (for example).
/usr/java/latest/bin/java -jar MyApp.jar
These jars exist in different places and use different ...
1
vote
3answers
63 views
Linux / JVM - OutOfMemoryError: unable to create new native thread
I have a memory problem with a Linux server (CentOS). It is a VM. Below is the context.
It has 70Gb of RAM. There are 2 tomcat running on it.
One tomcat is given a heap of 13Gb and the other one a ...
0
votes
0answers
36 views
Prevent Java to escalate CPU usage on Slackware64?
I use Slackware64-current on my work laptop and though I love running Slackware, sometimes it hangs on me near to the point of starting considering falling back to Windows.
I develop on Java and use ...
1
vote
1answer
80 views
Minimal Java installation for Linux with no GUI
I'm working on a CentOS 6.3 x86_64 minimal OS (installed using the netinstall ISO).
This system is not expected to run anything beyond console apps/services and Tomcat7. When I attempt to install ...
3
votes
0answers
57 views
RES memory more than initial and maximum memory for java
We have a java application running on Centos 6.4 what we notice is that the RES is around 370m which is more then the allocated max that is 256m. Does this signify that we the application is leaking?
...
1
vote
0answers
84 views
Ant error after installing NetBeans 7.3 in Lubuntu
I have NetBeans 7.01 from Debian repository - all works. But I have a problem with NetBeans 7.3 from the official site (installed on the same machine) - I can't compile anything:
ERROR - Ant is ...
0
votes
0answers
37 views
How to install DrJava?
I'm just starting to use Ubuntu and am trying to install a drjava-stable-20120818-r5686.jar file.
I have followed the instructions on the DrJava site and from answers on other questions on this site, ...
2
votes
2answers
103 views
Do I need to remove all “java|jre” packages from my system to be secure from java vulnerabilities?
Currently I have these installed on my Scientific Linux 6.3:
[root@localhost ~]# rpm -qa | egrep -i 'java|jre'
java-1.7.0-openjdk-1.7.0.9-2.3.7.1.el6_3.x86_64
...
0
votes
0answers
44 views
A simple script to make a desktop version of Nimbuzz WebChat? [closed]
There is a nice little script which uses python-webkit called "RGB/HEX Color Picker" here: http://gnome-look.org/content/show.php?action=content&content=128317
I tried if I can use it to make a ...
0
votes
0answers
40 views
Forking two interactive bash processes causes parent process to stop or second bash to go background
If you fork (exec) two interactive bash processes within same parent process (from different threads) causes that parent process becomes stopped or second interactive bash goes to background which ...
1
vote
3answers
314 views
Kill only one Java process
I usually run few Java applications, one for server running locally and other for some IDE like NetBeans. And from time to time, after lots of redeployments, my server get stuck on ...
1
vote
1answer
98 views
Point IP to an application instance
I was just wondering how I go about pointing a static IP address which I have purchased to an application instance on my server, using a different IP from the one I currently have pointing to my main ...
2
votes
1answer
163 views
IBM Java Runtime Environment on CentOS
I need to install IBM's JRE, but I can't seem to find an appropriate download or guide to installing it on CentOS. I've found various zips, but none of them include an RPM and I have no idea where to ...
1
vote
1answer
1k views
Missing 32 bit library on a 64 bit Linux install
I am trying to figure out why Eclipse is complaining about being unable to find a library. I've managed to reproduce/reduce the java problem to:
$ ldd ...
3
votes
1answer
90 views
update-alternatives just for one user
I'm using a shared server.
On that server different versions of Java are installed:
Selection Path Priority Status
...
3
votes
1answer
197 views
Cannot kill a java process
I have a java process that cannot be killed. I have tried every method I know, or that I have found on the internet to no avail. I have tried:
killall java
kill -9 <pid>
kill -11 <pid>
...
1
vote
3answers
3k views
Java update on Centos
I am pretty unfamiliar with Linux, and the more I use it the more I realize how unfamiliar I am.
I have a Centos 6.2 machine. It currently has JDK 1.6.0_26 installed. I would like to update that to ...
3
votes
2answers
273 views
What is meant by stack in connection to a process?
From the book Advanced programming in the Unix environment I read the following line regarding threads in Unix like systems
All the threads within a process share the same address space, ïŹle
...
3
votes
2answers
3k views
Installing JDK 7 on debian
So I just rented a dedicated server running Debian, and I know nothing about Linux.
Anyway, I want to install the JDK 7, first I connected through SSH and granted myself administrator rights by ...
2
votes
0answers
158 views
Java uses max 8 cores on Debian, even though 16 are available [closed]
I have two servers at hand, both with 16 cores. The first is running Debian, the second running Ubuntu.
I have written a small multithreaded java app that creates 16 threads. On the Debian machine, ...
0
votes
0answers
192 views
Java SWT App: Need 64-bit swt.jar
I have a Java app that I want to run in Ubuntu, but I have Java 64 so I can't run it because it only has the 32-bit swt.jar. I can't build it myself, so Is there anyone that can provide the 64-bit ...
1
vote
0answers
73 views
Visually-transparent & Input-transparent Windows
I'm a Java programmer who's rather new to Linux. I'm on Suse / Gnome and I need to create a window which:
Is visually translucent/transparent. This is the usual alpha blending
that composes a ...
0
votes
0answers
37 views
How to execute a command as a service in Linux [duplicate]
Possible Duplicate:
how to make system service out of .jar file? (linux)
I am executing a command from Linux to establish a connection between Linux and a cloudbees machine. How could I run ...
2
votes
1answer
200 views
How to trace a java-program?
As a sysadmin I sometimes face situations, where a program behaves abnormally, while not creating errors at all or creating nonsense error-messages.
In the past - before java came in - there were two ...
3
votes
0answers
87 views
Implement Java/JavaFX on ARM
I am working on ARM Linux.
I have found this link that says that JavaFX could work on ARM.
I am confused about Embedded Java SE and JavaFx ARM. Do I need to setup a JVM for those or not?
I have ...
4
votes
1answer
674 views
Use certain version of JRE / JDK for certain programs
I use ArchLinux, and an IDE called PyCharm. On its download page, it recommends using Java 6 instead of OpenJDK. ArchLinux has an OpenJDK package (jdk7-openjdk) that I have installed, installed, and ...
1
vote
1answer
152 views
How to start java application after machine reboot?
I'm wondering if there is easier way to start java application (just tomcat server) after machine has been rebooted?
Possible answers:
Add the application as a service and then add it using ...
0
votes
2answers
327 views
Java version for Tomcat
I want to run my Tomcat with Java 7 but all I found about configuring it doesn't work. The management interface of Tomcat shows 1.6.0_24-b24 as Java version. The JAVA_HOME variable is empty.
% echo ...
1
vote
1answer
390 views
Using NetBeans on ARM Linux?
Is it possible to run NetBeans on a ARM CPU with Linux as OS (maybe Debian) ?
I want to be clear I don't need to compile for ARM (I will use NetBeans only for PHP coding).
So the question is about ...
1
vote
1answer
136 views
CentOS5, RHEL5, Java dependent Packages, Alternate JVM/JDK
Specifically regarding Java dependent packages, such as ant. Is it possible to install them via rpm, when using an alternate JVM/JDK? For example, If I install the Oracle JDK, can I use an ant ...
2
votes
1answer
152 views
Problem with java3d
I want to play this java simulation: http://www.compadre.org/OSP/items/detail.cfm?ID=9640 in java 3d mode on a linux (ubuntu) system. But it doesn't work.
If I switch to java 3d-mode it complains ...
1
vote
1answer
906 views
Installing jdk7 on Debian server via SSH
Currently, I'm trying to launch a java program on a server. The server is launched on my virtual machine (VirtualBox) and controlled over SSH. Its OS is Debian. So, in order to launch my program I ...
1
vote
1answer
185 views
What is the command or hotkey for stopping a running program in DrJava?
I installed DrJava about a week ago. Its been working fine so far but I ran into an infinite loop and wanted a way to stop the program from running without having to force DrJava to quit. Is there a ...
0
votes
1answer
246 views
How do I install drjava in linux from terminal?
I've downloaded drjava-stable-20100816-r5366.jar file which is the drjava version for Linux. How do I install it on my machine?
I'm running Ubuntu 11.10.
I have OpenJDK Java 6 runtime and Sun Java 6 ...
0
votes
1answer
859 views
Upgrade java on Linux Mint 11
I'm unable to use web-based java content due to my version being out of date.
%>java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) Server ...
1
vote
1answer
297 views
How to force a particular version of Java?
I am on a RHEL 5.5 64 bit box. The systems engineer installed the 64-bit Java VM under /usr/bin ; however, I needed a 32 bit VM which he installed in /opt/jdk1.6.0_35. But now, everytime I do java ...
5
votes
1answer
1k views
How do I update IcedTea?
I've only been using Linux for about a month. I'm running Mint 13. I'm trying to use www.goproblems.com but it tells me that my IcedTea is out of date. I hoped there was a package but I can't find ...
2
votes
1answer
1k views
How do I download and launch a JNLP file in CentOS?
I'm using Amazon's GPU cluster to experiment with some HPC java code on CentOS.
The Java application is in JNLP format and has a GUI.
I've followed Amazon's getting started video, but I'm not ...
2
votes
2answers
508 views
How to to remove libgcj from Debian?
I am doing Java programming on Debian. By default Debian 6.x ships with libgcj JVM. On starting eclipse it shows a warning that this JVM is deprecated and may cause problems. For this reason I ...
1
vote
0answers
191 views
Installing jdk 1.4.2 on fedora 14
I am trying to install wsdgate,
In the installation they have recommended to use jdk 1.4.2,
I already have jdk 1.7 but I am not able to install JDK 1.4.2 on fedora 14.
I got error like this
could not ...
