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

learn more… | top users | synonyms

3
votes
0answers
209 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 ...
5
votes
1answer
25k views

How to completely remove Java 6 and install Java/JDK 7 on Linux Mint 13

How can I completely remove Java 6 and install Java/JDK 7 on Linux Mint 13?
5
votes
1answer
3k 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
401 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 ...
2
votes
2answers
2k 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
1k 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
192 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
2k 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 ...
0
votes
1answer
1k 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I'm unable to use web-based java content due to my version being out of date.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 ...
0
votes
1answer
837 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 ...
1
vote
1answer
903 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 ...
3
votes
1answer
7k 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 ...
4
votes
3answers
7k views

What to do to run GUI Java app in chrooted environment?

In my case Java app is JDownloader. I prepared chroot environment as explained here: http://www.0x61.com/forum/post5240333.html#p5240333 and here: http://interreality.org/~reed/java-chroot.html ...
5
votes
4answers
1k views

Is there a JVM daemon?

I'm curious, is there a JVM which runs as an OS daemon, and forks when a new process should be started in it ( i.e. like init, or zygote process on Android )? If no, why not? I am not talking about a ...
3
votes
2answers
1k 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
302 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 ...
6
votes
2answers
2k views

How do I change file associations from the command line?

The system in question is Solaris, using the Gnome type interface (Java Desktop Environment). We have occasional issues with users managing to mess up their file assocations (most notably .tif). ...
2
votes
1answer
3k views

How to set jsse.enableSNIExtension to false when running Java programs?

I am trying to set the Java system property jsse.enableSNIExtension to false, but when I try running this java just outputs help information: java -Djsse.enableSNIExtension=false What am I doing ...
3
votes
2answers
584 views

Java process, swap (/proc Solaris10) memory highly utilized

How can I analyze high swap memory utilization of Solaris 10 for Java processes?
2
votes
1answer
4k views

How to run a .jar file? No main class found

How do I run a jar file? I tried this : java iCChecker.jar but I got next trace : Exception in thread "main" java.lang.NoClassDefFoundError: iCChecker/jar Caused by: ...
4
votes
2answers
8k views

How to install JRE on firefox with fedora (64bits)

What do I need to run Java web applications on firefox with my 64bits fedora 17? I can't pass this test but I have installed the x64 rpm from there. What is missing? Additional note: I tried to ...
2
votes
1answer
561 views

JRE in Kubuntu doesn't allow me to run .jar file

I am having trouble trying to run a .jar application on Kubuntu. I created an application in NetBeans in Windows and compiled it into a .jar file. First Windows couldn't find the main class. I ...
3
votes
2answers
490 views

Running jobs in parallel on Ubuntu - I/O contention differences between Perl and Java

Apologies if this is off topic - it concerns the relative efficiencies of running I/O-heavy Perl/Java scripts in parallel on a Ubuntu system. I have written two simple versions of a file copy script ...
0
votes
2answers
1k views

Tomcat does not get enough memory

i'm trying to setup a jira instance on my vServer. I've got min. 1 GB ram and max. 2 GB ram. It was runing on my friends Server with only 512 MB ram. The first error was: ...
2
votes
0answers
461 views

can't open netbeans IDE in Fedora 17

my linux version is: Fedora 17 I installed Netbeans IDE 7.1.2 and it was working fine, but now, when I try to open it, nothing happens after double clicking on it. I think updating the kernel may be ...
4
votes
2answers
2k views

Linux running slow with 0 swap left

Our Linux server is responding very slowly. top doesn't show any excessive CPU usage. I noticed that even though there's about 5GB of free memory, the system is using all of swap with no free swap ...
6
votes
2answers
1k views

Java problem - nearly looks like a virus?

I have a weird problem since about a week. When I wake up my computer from suspend, a java process starts and consumes about 170 % CPU capacity. I analyzed the java process a bit: it connects to ...
6
votes
2answers
7k views

Adding a folder of jar files to my path

Unix newbie here. I have java tools that I need to use. The tools are in a folder full of jar files. I wanted to add this folder to my path, for the obvious reasons, but after I edit my .bash_profile ...
2
votes
2answers
4k views

apt-get install - where does it go?

Just a basic question on this utility... I did sudo apt-get install libhtmlparser-java And I would like to see the source I just downloaded. On Linux (Ubuntu) where ought I look for this?
0
votes
1answer
616 views

32 or 64 bit class file

I have a Java .class file. Now I want to check it was compiled on a 32 bit machine or 64 bit machine ? I tried file command but it just says it is a compiled java class. Is there any way to find it?
1
vote
1answer
250 views

How can I get this java command to act on each file found by a find command?

I have this command inside a Bash shell script, the intention of which is to apply a java command, htmlcompressor, to each HTML file found in a directory: find $DIR -type f -name '*.html' -exec java ...
3
votes
1answer
405 views

Java on FreeBSD

Is it possible to get the latest Java (Java 7u3 or Java 6u31) on FreeBSD? Everything i found on the internet is outdated. I currently have 6u24 from the packagemanager which works for now but may get ...
6
votes
1answer
19k views

Installing openjdk-7-jdk does not update java (which is still version 1.6)

I am having issues updating Java. I am running Ubuntu 11.10. I can execute sudo apt-get install openjdk-7-jdk and it completes successfully. javac -version is 1.7, however java -version is 1.6. This ...
0
votes
2answers
781 views

Do I have duplicate packages?

I'm on linux mint 12, when i run sudo apt-get update i see: W: Duplicate sources.list entry http://www.duinsoft.nl/pkg/ debs/all i386 Packages ...
0
votes
0answers
355 views

Remove duplicated Java packages

I'm on linux mint 12 I have installed Java, following the NetBeans instructions. It wasn't working on chrome, so I installed it like that: sudo echo 'deb http://www.duinsoft.nl/pkg debs all' ...
1
vote
2answers
4k views

How to uninstall java on Linux Mint 12

Today, I downloaded the latest java jre which is a .bin file By mistake, I installed it on my desktop by running ./jre. I want to remove this installation, move the .bin file to somewhere else and ...
4
votes
1answer
922 views

How do get unix sort to sort in same order as Java (by unicode value)

I shell out sorting to the unix sort command in a Java program I've written. However I am having problems arising from Java's string comparison behaving differently than the comparisons done by sort. ...
3
votes
0answers
348 views

VMO Changes After Adding New RAM To AIX?

We have a server at a client site running AIX 5.3, which we just up the RAM to 32GB, from initially 16GB (if I'm not mistaken). This server is our Application server running J2EE applications on top ...
3
votes
2answers
446 views

Capturing new output after deleting the output file

I'm runnig a java server on Debian with this command: java -jar myapp.jar [args] >> log.txt Once I gzipped the log file to send it and then I realized the original file was gone, leaving me ...
2
votes
1answer
162 views

How to uninstall java from sco openserver 5.0.6?

I have installed Java (J2SE 1.3.1_21) by following this tutorial: http://www.anyang-window.com.cn/in-the-sco-openserver-506-installed-on-j2se-13106-development-environment/ Now, I want to uninstall ...
1
vote
2answers
774 views

Problem installing JDT in Eclipse on linux

I installed Eclipse on Fedora Core 14 using yum install eclipse-platform. I ran eclipse and tried to install the java development tools, but then this error came up: Cannot complete the install ...
3
votes
3answers
876 views

Monitoring progress/liveness of background jobs

I have started a background job. Is there a way to know how it is progressing, and whether it has stopped? My command line is like: java weka.classifiers.trees.J48 -t data.arff J48-data.model ...
1
vote
2answers
394 views

How to log the output of a daemon application?

I have a Java program running as a daemon (thanks to YAJSW, a wrapper for java). The thing is that this java application writes several lines of console text, (simply imagine a Hello World App). If I ...
2
votes
0answers
169 views

Any way for Unix to ignore lpoptions and let Java do it's job?

I'm using the javax.print API to print a Jasper Report on Debian Linux. For some reason the saved lpoptions (CUPS settings) always override settings chosen on the Java Print dialog. At this point the ...
3
votes
4answers
1k views

How to run java process to be seen not as 'java…' in processes list?

Is it possible to run a Java process in Linux in a way that it could be seen in ps as some sort of alias? It would be easier to restart it when it is down.
5
votes
2answers
6k views

Looking for a Java class in a set of JARs with find, unzip, grep

I was trying to find the JAR containing a Java Class. JARs are in zip format. My first attempt was: $ find -name "*3.0.6.RELEASE.jar" | xargs -l1 unzip -l \ | grep stereotype.Controller ...
1
vote
1answer
1k views

Debugging Java program for changing timezone configuration file on Ubuntu

Here is a ruby script I wrote to change the timezone configuration on Ubuntu. I run it with jruby (a Ruby interpreter running in a JVM). require 'java' if ARGV.length == 0 puts "Usage: jruby ...
0
votes
1answer
540 views

Enter process running in background/bring to foreground [duplicate]

Possible Duplicate: How can I disown it a running process and associate it to a new screen shell? I started a java client using nohup to get it to run in the background (needed to log out ...
1
vote
0answers
198 views

Rogue Java process brings my computer to a halt

In reference to my earlier post: Is there a log of past threads that are now closed? I gave the process a kill -STOP signal and started examining the details. I can't seem to figure out why it is ...
2
votes
1answer
1k views

Netbeans has no display on my computer

I installed netbeans using zypper install netbeans. Trying to run it, I get the "loading" splash screen which is proceeded by a small popup which asks me if I want to register my copy and receive some ...