Java is a general-purpose programming language and a computing platform called the Java Virtual Machine (JVM).

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org.eclipse.swt.SWTError: No more handles [gtk_init_check() failed] while running spoon.sh in ubuntu

When I am running spoon.sh file in Ubuntu I am getting the following error: [santosh@sbx data-integration]$ ./spoon.sh /home/decathlon/Pentaho-5.0.1/data-integration org.eclipse.swt.SWTError: No more ...
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Adobe Experience Manager Author Server running maximum CPU

Adobe Experience Manager Author Server running maximum CPU I have an adobe experience manager author server which is using 100% CPU. When I check the online sources and documentation, I was asked to ...
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23 views

Sending data from rs232 [duplicate]

I'm trying to write a loopback test with pins 2 and 3 connected. I am using Ubuntu OS and java for the code. The library that I'm working with is JSSC. I am able to read and write from the serial ...
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1answer
21 views

Why is Android studio complaining about OpenJDK?

I have latest version of Manjaro 64 bit, latest version of Oracle's JDk and Latest version of Android studio. Everything is up to date on my system. Android studio is complaining about OpenJDK ...
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foolproof way to detect if java process is running

I have a java process that runs continually that sometimes, for reasons I have yet to fully debug, craps out. So, I also have a cron job that looks for the process every 5 minutes and if it finds the ...
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Java version is different in GUI and command line

On my Mac I have two different indications of the activated JAVA version $ uname -a Darwin Mr-MBP.lan 14.4.0 Darwin Kernel Version 14.4.0: Thu May 28 11:35:04 PDT 2015; ...
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Java location from /usr/bin/java

I'm trying to find my java location within my Linux system and got this [980@b449 ~]$ which java /usr/bin/java [980@b449 ~]$ readlink -f $(which java) ...
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How to remove JDK 7 and install JDK 8 in Linux Mint?

JDK 7 is already installed in Linux Mint by default. I want to remove it and to install JDK 8 instead. I youtubed and i found a tutorial. I followed it. What i did was, first i downloaded JDK from ...
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java.lang.NoClassDefFoundError while executing in spring [migrated]

getting error of "java.lang.NoClassDefFoundError" while executing the submit button, the compilation was really successfull and the build/class/ Error INFO: Pre-instantiating singletons in ...
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24 views

update-alternatives returns error about Java directory not available

I've been trying this tutorial: How To Manually Install Oracle Java on a Debian to install Java on Debian 8, but I'm getting the following error : update-alternatives: error: alternative path ...
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33 views

Can't test Java installation as normal user

I have installed java and firefox. root@localhost:/home/debian# java -version java version "1.8.0_45" Java(TM) SE Runtime Environment (build 1.8.0_45-b14) Java HotSpot(TM) Server VM (build 25.45-b02, ...
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How to install openjdk properly?

Something wrong in my openjdk,i purge it and reinstall it. root@localhost:/home/debian# apt-get remove --purge openjdk-7-jre Reading package lists... Done Building dependency tree Reading state ...
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Issues with Java in Linux

Firstly, I would like to apologize as I'm not quite sure whether this question is suitable to be on this site or Stackoverflow. I chose U&L eventually because the traffic here is much lower ...
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1answer
31 views

When I execute a .run file as <user> it works fine. If I sudo run it, it cannot detect Java

I am trying to execute a .run file that will install some applications. I'm installing the application in /opt/... When I run it without sudo, the installer runs correctly but cannot write to /opt/. ...
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1answer
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How can i know which unistd.h file is loaded?

I have several unistd.h files in my Ubuntu Linux. I've one on /usr/include/asm/unistd.h. This file has this directives: # ifdef __i386__ # include "unistd_32.h" # else # include "unistd_64.h" # ...
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1answer
652 views

Java/malloc memory corruption error when running SDK Android Manager

I want to install Android SDK, so I manually installed Java JDK 7u51, downloaded SDK ADT bundle for Linux x64, and tried to run it. When I run android, the SDK manager windows hangs halfway through ...
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40 views

Where to store the SQL Server jdbc driver file for use by all users

I have downloaded the sqljdbc4.jar file which enables connecting to SQL Server via jdbc. I currently have this in a personal folder whilst I've been testing connectivity. I'm hoping to put this file ...
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30 views

how to make special program run with different version of java from system? [duplicate]

My system need to use java 1.7. However, I need to run some old apps which require java1.6. Can I use shell script to let the old apps use correct java version? Could the $JAVA_HOME help? I try to ...
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2answers
44 views

Java programs not running in terminal

I have java 8 installed on fedora 20. Any java program runs perfectly fine via eclipse but when I run the same program on terminal it reports an error saying 'could not load main class' . what could ...
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3answers
1k 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 ...
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2answers
9k 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 ...
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1answer
697 views

Increasing `ulimit -u` settings temporarily in OSX Yosemite

I'm trying to temporarily (without restarting the machine, just for test that starts a JVM) increase the number of processes to 2048 in OSX Yosemite but I'm unable to do so. First, I tried calling ...
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28 views

XFCE strange behaviour on Java applications

I recently moved to XFCE 3.12 on my laptop and everything is working great except for a strange behaviour in Eclipse and other Java applications. When expanding a line selection with Shift+Up or Down ...
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OS X Java Security Edit Site List En Masse

I'm sure, like many other systems administrators like myself who use Mac, you've come across the dreaded Java Security site list and the need to add IP's for individual blades, servers and anything ...
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29 views

How to switch java environment for specific process?

I use openjdk in my work, but sometimes I need oracle's jre or even specific version of oracle's jre. As I know, I should update JAVA_HOME value and /usr/bin/java or /etc/alternatives/java link ...
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31 views

How to change JAVA_HOME temprorary with env command

I use openjdk for my work, but sometimes I need oracle's JRE. I thought that I could use 'env' command for this, but can't figure out why it's not working. I have openjdk in ...
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Java application freezes until I use 100% CPU

The issue I encounter When working on Android-Studio or even Eclipse, the software often freezes (even though usually it is after I update my system). If I move to another desktop and come back, then ...
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1answer
30 views

Why does gstreamer-ffmpeg change the fonts for java applications?

I recently installed gstreamer-ffmpeg-0.10.i686 on RHEL 7. As a result of this text in my java program has become slightly larger (maybe 2 or 3 font sizes), which is enough to mess with some of the UI ...
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1answer
35 views

How to copy a installed library to a remote Linux host

I am a newbie on Linux and trying to host my Java project on a remote linux host(CentOS). My Project depends on some native libraries that needs to be existing in the host, and since it is a shared ...
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1answer
19 views

JAR file terminates unexpectedly without error

I have a JAR file that I'm running in a screen session using java -jar <myjarfile> and for some reason it stops running at unexpected times. I'm redirecting both the StdErr and StdOut to ...
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33 views

can't start tomcat6(yum) org/apache/catalina/startup/Bootstrap (Unsupported major.minor version 49.0)

i installed tomcat6 on centos6 through yum, when i start tomcat6 (service tomcat6 start), it shows [OK] but, when i stop tomcat6 (service tomcat6 stop), it shows [failed], and i found exception in ...
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115 views

Tomcat won't use setenv.sh

I have Tomcat installed as service. It's CATALINA_HOME and CATALINA_BASE are same: -Dcatalina.base=/usr/share/tomcat7 -Dcatalina.home=/usr/share/tomcat7 I added setenv.sh script to ...
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51 views

installing java on cent os 6.6 64 bit system

am trying to follow this link: How to Install JAVA 7 (JDK 7u79) on CentOS/RHEL 7/6/5 and Fedora So I downloaded the jdk tar and untarred it.However when I run java -version from within bin I get the ...
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4answers
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Java “Could not reserve enough space for object heap” even though there is enough RAM

I am currently having some issues running Java. It won't start because of heap issues. But I have more than 9 GB Ram free (or even 16 GB if you assumed the cache would be empty). This is the error I ...
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1answer
44 views

Block outgoing connection from running process

I have an java application that I have been developing. I use a external db server that I can't control. I want to simulate connection error to it, but I'm unable to do it. I have tried to use ...
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1answer
51 views

What makes a program Linux compatible/incompatible?

I understand that Linux does not support .exe's, but is adding Linux support as simple as providing a .jar version? This summer I'm going to try to really start programming and contributing to... well ...
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Java process gets killed frequently by OOM - Killer on upgraded hardware

I am running solr on an Ubuntu server along with 4 other java processes. Current index size is 30 GB. My solr process gets killed frequently in few hours. It clearly mentions that its an OOM killer. I ...
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21 views

Remove or decrease JAVA Security openjdk AWS centos instance

How to decrease or remove java security level in CentOS openjdk? I tried removing the java security level but I didn't find any option, my OS is in an ec2 aws machine.
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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 ...
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Is it possible to create aliases that affect services starting?

Currently I have a custom service that executes java in multiple places. I want to be able to add an option to any executions of java this service will spawn (I'm specifying the error log location, ...
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1answer
99 views

Open Java programs of a linux machine on Windows with SSH?

I usually use laptop (which has Windows) to ssh to my Linux server and run stuff on it (e.g. Intellij, MATLAB). I wonder if there anyway to open Java programs (again, like Intellij) of a remote ...
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Debian Packaging with JavaSwing?

On my Ubuntu 14.04 machine I am developing a java swing application and I'm compiling it with oracle java version "1.7.0_80" In the myapp-1.0.0/DEBIAN/control file I put the following information: ...
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Help with java on Fedora

I have installed java on my fedora, because when I execute java -version I get: openjdk version "1.8.0_25" OpenJDK Runtime Environment (build 1.8.0_25-b18) OpenJDK 64-Bit Server VM (build 25.25-b02, ...
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1answer
40 views

How to know if I correctly installed Java?

I am very new to Linux as I just installed it on my HP Chromebook (Xfce). I am trying to get OpenJDK 7 on it. When I use the Software Center to install it, it looks like it installed correctly, but ...
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JRE failed even after open jdk as well as oracle … using ubuntu14.04

$ sudo update-alternatives --config java There are 2 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status 0 ...
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How to find path where jdk installed?

I've installed jdk1.7.0.rpm package in RHEL6. Where I do find the path to execute my first java program?
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Centos 7 - where is jfx library for openjdk8?

I have centos 7.1. And I installed openjdk8 and openjdk-devel8. However, when I tried to compile in netbeans my jfx application I get package javafx.* does not exist. After some investigation I see ...
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1answer
484 views

freebsd make install openjdk6

I am having problem installing openjdk6 using ports using the make install clean commands. The error I got is: /usr/ports/java/openjdk6/work/build/bsd-i586-debug-fastdebug/j2sdk-image: No such ...
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1answer
565 views

Writing a systemd unit file with a environment-set executable path

I am writing a systemd unit file for a Java application and I'd like to control the version of Java used to start it up. My (simplified) service file is [Service] Type=simple ...
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after reboot server, service start without special chars

I write simple Java server. This service (java server) connect with mySQL database. I am connecting with this service by socket connection. Everything work well when i start my service by line ...