Java is a general-purpose programming language and a computing platform called the Java Virtual Machine (JVM). Use this tag when you are dealing with a java program, installing java, or configuring a java installation.

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Interactive Shell Session from Java

I want to run a series of commands from Java. I came across few forums that explain how to execute multiple commands using getRuntime().exec(command) and defining command as String[]. But I want to ...
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NetBeans : Can't build Java project

I installed today on my old developer PC NetBeans (the newest) and I cloned my repo from BitBucket (I began coding with NetBeans on Windows 7). I tried to make a clean build, but the compiler has ...
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How to modify ENV in Solaris 10 [duplicate]

I wanted to edit the contents of environment when entering this "ENV" in terminal. I googled this but so far none of the solution offered works in my end. The closes solution that i got was to edit ...
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Where can I set global Java Options?

I have horrible, improperly-rendered fonts in Java programs such as jabref and rubymine. This can be fixed by running _JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=on' jabref I understand that I ...
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238 views

Sending a tab key event using applet to a unix machine?

i have an applet , that interacts with a remote unix machine . Everything works fine . I'm following the ganymede-ssh code . below is the code excerpt . session = CLIUtil.createTerminal(); if (...
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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 ...
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How to increase the memory used by Java in linux?

I have a program Vuze that is written in Java, which I use to download very large files, and I'm having a problem with it. I need to increase the amount of memory it uses. I've followed the directions ...
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433 views

Lots of free memory, but Java won't start (SunOS 5.10)

vmstat gives: swap free 37489684 110178592 Still I have issues, while trying to run Java process with 10g heap: > java -Xmx10g -Xms10g -d64 HelloWorldApp Error occurred during ...
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671 views

OpenJDK update in RHEL 6

We need to apply the JDK updates to one of the RHEL 6 servers. How do I apply the patch if I have the RPM package available, which I have downloaded from the internet. Searched a lot on the internet ...
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144 views

Fluxbox: is there a problem with java modal dialogs and fluxbox?

I have got a java application that opens a modal dialog. The modal dialog is shown behind the main window and there is no way I can bring the modal dialog to front. If I switch to Cinnamon everything ...
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929 views

Trying to install 32-bit java plugin on Centos 6.5 64-bit mozilla firefox

Long story short, my employer's webstart VPN requires 32-bit java to launch. I managed to get this working on a 64-bit CentOS 5.6 vm, but I cannot remember what I did or it's not working on 6.5... ...
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430 views

Error initializing server: OC4J administrator account is not configured

I am getting the following error message when trying to bring up ./oc4j service (oc4j_extended_101350.zip). [oracle@sc-ifactory01p bin]$ ./oc4j -start Starting OC4J from /apps/prd/...
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346 views

Mandatory argument for script to run java program

My script is called: report_startDate It has the following line: $JRE_ROOT/bin/java -cp /home/me/report/config/:/home/me/report/jar/reporting-1.0-SNAPSHOT.jar com.me.project.report.Main $1 $1 ...
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605 views

Choose a terminal emulator from Java [duplicate]

I am writing a platform independent Java console tool and within which will have to execute some commands in separate independent terminal at runtime. However, I need to know which terminal should I ...
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507 views

Allow non-root unmodifiable sofware to bind to ports 80 & 443

The company I'm in uses the Java Secure Application Manager to "secure" non-internal connections their webmail and electronic collaboration software. Aside from using expired certificates, and ...
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815 views

mysql jdbc connection issues in RHEL 6

I have setup the mysql database in one of the RHEL 6 servers. I would like to connect to this server's database from any other machine using a java program. How should I do it?
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Launching a sudo gui from desktop

Environment: CentOS 5.10 on 32 Bit. test.sh: #!/bin/bash cd /dump sudo /opt/java/jre1.7.0_60/bin/java -jar mytest.jar mytest.jar will pop a GUI app in the desktop, username is in sudoers with ...
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Messed up bash.bashrc file, commands not working anymore

Trying installing Java, I tried to add it to the executable path with the line: export PATH=/usr/lib/jvm/jdk1.7.0_60/bin:$PATH in the system-wide /etc/bash.bashrc file. For some reason this ...
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1answer
1k views

Poorly performing java application vs poorly performing server

This is a very generic question, but it has been coming up more and more often for me. I would like to try and determine an appropriate course of action for this generic case, as I think it could ...
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1k views

Tomcat: no xmx/xms value set, where is the heap value being defined?

I have a Tomcat 7 install running with Java 1.7 on a Linux 2.6 server, and jinfo shows no xmx or xms values. ps output shows nothing set for xmx/xms on the command line for the java process. Tomcat ...
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3answers
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Mathematica makes no sound under Ubuntu 11.04

After waiting for days for my license I now got the opportunity to install Wolfram Mathematica 8 at home. However, neither the Play nor the Speak functions are doing anything as it seems that ...
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199 views

locate java source code in jdk7

I have installed Jdk7 in Ubuntu 14.04 and it is successfully configured and I can use java libraries in code. The problem is that I am trying to locate java source code, but not able to find the jar ...
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Why uninstalling openjdk automatically triggers an installation of the alternatives on zypper openSUSE?

I installed openSUSE 13.1 and I want to install Oracle jdk. What I intended was to first uninstall open_jdk/ice tea stuff as I won't be needing them anyway but it seems I cannot uninstall them without ...
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302 views

Make sense of this strace output

Can anyone make sense of this strace output? [pid 25302] read(34, "}B\311\204\n\250\347$\220\266kRb\304a^^\2504\303k\235\227T\223\16\231\306\277\254\256\306", 32) = 32 It's from a Linux system ...
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sun.jdbc.odbc.JdbcOdbcDriver not found

I'm configuring a Business Intelligence tool Yellowfin BI on my Debian Linux server and I get this error: Error Message: java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver I cannot ...
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551 views

get CPU usage of a VM (linux) using java

Is there an API for Java in getting the CPU usage of a VM in KVM? I want to know how I could get the CPU usage of a guest (from the host's perspective) using Java. Also, does anybody know where I ...
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Solaris JRE Mozilla

In an thin client setup where Solaris 10 is being used on client and server side. Java based web apps are opened in Mozilla web browser 1.7. JRE version 1.4.2.6 is installed for Mozilla. On a few ...
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446 views

Mail Delivery too slow with sendmail

We are using javamail to deliver mail for our applications. The mail function runs in a loop to deliver around 100 to 200 mails depending on the range we use. However, it taking more than an hour to ...
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683 views

Programmatically creating .desktop file to autostart application

Using a Java program, I added a .desktop file in /etc/xdg/autostart to run a script when a user logs in. The script didn't run at user login, and when I checked the start up applications dialog ...
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196 views

Flipping Control/Command in GNOME breaks Alt key in JVM

I want to switch Control and Command modifier keys in GNOME / Debian Jessie, because I use a Macintosh laptop. I have managed to get these changed via the TweakTool -> Typing panel, like this: Ctrl ...
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Java doesn't show menu text

I startet netbeans/intelliJ/squirrelSQL after I didn't use it for a few days/weeks and now the menu doesn't show text. There are just the underlineds. My system: ArchLinux (everything up to date, ...
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428 views

Why All the text is invisible in Intellij? [duplicate]

I have installed manjaro and intellij. For a couple of month now I had no problems at all and I was fine with that. Since yesterday I experience a strange bug. The whole text is gone. What I tried ...
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How can I expose JAVA_HOME to applications running under X and/or Gnome?

I'm trying to run IntelliJ from Gnome3's Applications menu, but it complains the JAVA_HOME variable is not set. I have the Java installation under my home folder. I managed to export the variable in ...
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1answer
74 views

Update Oracle JDK

I know, there are several ways of installing ORACLE jdk7 on Debian. One way is to use the ppa from the web8updteam but i've read that installing software from ppa is not recommended on Debian. (is ...
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138 views

Use FindBugs in Eclipse from terminal on Ubuntu

Is there any way I could use Findbugs from terminal to get all the bugs in my Java code and print it out to a text file? I want to write a script that goes through 100 java files ( this is already ...
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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 ...
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Java plugin not working with FireFox 24.3.0 on Red Hat Enterprise Linux 5.10

In the about:plugin tab, there is not Java plugin. I have created the symbolic link as suggested. The output of the 'ls -al' command is: lrwxrwxrwx 1 shehab shehab 58 Jun 4 11:21 libnpjp2.so -> ...
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515 views

Run jar on startup in all *nix based systems

I have a jar file which I need to run at startup in all distros of Linux. My previous question here, gave me an idea a rough idea on X-servers. Since I wasn't able to perform startup, I moved on to ...
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588 views

grep on a Java Method

Lets say I have a java class called DirectAction some of the methods in the class have the word "action" or "Action" What is the grep command to get the names of all the methods who have "Action" or ...
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Porting jvm into the kernel space?

Currently I am playing with the idea of a jvm running in the kernel space, as a (maybe linux) kernel module. I see a lot of advantage of the idea. Of course the biggest advantage of a such system ...
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davmail and JAVA INSTALLED MANUALLY

I'm trying to install davmail, I've already install JAVA manually (tar.gz file). After trying with the ppa:webupd8team repo and not having good results. Had to clean a lot of files packages and so on....
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2answers
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Cannot install java after apt-get upgrade

When I execute java -version, I get this: bash: /usr/bin/java: No such file or directory I followed multiple online guides towards installing java. I followed all the steps but I still get that ...
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2answers
332 views

Lots of processes killed by SIGTRAP

Since yesterday, my Linux (Fedora 20) randomly kills processes for no reason at all (at least from my point of view), and the bugs reports say that all these processes are "killed by SIGTRAP". It ...
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1answer
352 views

A file exists but executing it doesn't work

I downloaded a Java tarball, extracted the archive and copied over scp to a remote machine. Using the ls command, the java executable exists: ubuntu@Ubuntu:~$ ls -la /home/ubuntu/jre1.7.0_55/bin/ ...
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How to run jgrasp on ubuntu?

I have problems with jgrasp. I get the following error message when I run it. ----jGRASP exec: javac -g R.java ----jGRASP wedge: could not execute javac ---- error number 2. ---- ---- ...
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Measuring context switches of a LWP gives incorrect results. Why?

I have a Java thread pinned at my cpu core. It is busy spinning and I see through top that it is running fine: %Cpu0 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu1 : ...
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588 views

I`ve installed sqlite. Now where should i find it? How to make connection from java? [closed]

I have Linaro 12.07 (Ubuntu 3) I`ve made sudo apt-get install sqlite3 libsqlite3-dev libxml2-dev g++ ncurses-dev and Linaro says: libncurses5-dev is already the newest version. libxml2-dev is ...
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What is the difference between JAVA_HOME and update-alternatives?

I have been trying to figure out the best way to run OpenJDK Java Runtime as default Java for my Fedora box and use Oracle JDK 6 for Android development namely for running Android SDK Manager, Android ...
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252 views

UDP sending two strings in a datagram

I'm wondering if its possible to send two strings within one datagram in a UDP packet. Assume I had string 1 with text: unix and string 2 with text: linux. I don't want to merge the strings but keep ...
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847 views

ADT bundle not installed in ubuntu 12.04

I downloaded ADT bundle from android developer site. Bundle name is :- adt-bundle-linux-x86_64-2014031.zip It contains eclipse, and sdk folder. In eclipse folder, there is one eclipse executable ...