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

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3
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1answer
476 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 ...
3
votes
1answer
31 views

Question on environmental variable

I have Oracle jdk7 installed on my centos6. I noticed that the /etc/profile has the lines below: #below lines are added for Java export JAVA_HOME="/usr/java/latest" ## export JAVA_HOME JDK ## export ...
0
votes
0answers
13 views

Java JRE 6 installation

I installed Java 6 (jre-6u45-linux-x64.bin) on a Ubuntu 12.04 machine following the procedure from this link: http://ubuntuforums.org/showthread.php?t=1904467. When I later installed Java 7 and ...
9
votes
7answers
30k views

Problem to launch java at Debian: “error while loading shared libraries: libjli.so”

I'm trying to launch java: $ java -version java: error while loading shared libraries: libjli.so: cannot open shared object file: No such file or directory $ ldd ...
0
votes
3answers
54 views

crontab is launching multiple java process every 5 minutes?

I have a java runnable jar which I need to run it if it not running or got killed for some reason so I decided to use crontab for this - I need to run the crontab as "poppetapp" user so I am logged ...
0
votes
0answers
12 views

Start a ssh when I click on a JSP button

I have a JSP page, which has a button. I want to start a ssh to the linux server whenever someone clicks that button. Will I be able to see the terminal inside the browser? How can I do this?
2
votes
0answers
14 views

JVM low-memory tuning

What command-line options would provide the lowest memory-footprint JVM, in OpenJDK, or possibly other JVMs (Linux/Debian)? I'm willing to disable JIT, live with slow or choppy garbage collection, ...
0
votes
1answer
754 views

How do I remove Java from Mint 17?

I got a version of Java 7 lying in /opt/java/jdk1.7.0_60/ That I don't seem to remember having installed myself. I want to replace it with OpenJDK 8, but I'm afraid I'll break something if I just rm ...
2
votes
2answers
1k views

Java JDK missing libjli.so path in dependency list, Debian

I am scripting the creation of chroot jails and part of that automation includes copying various executables and their dependencies into the jail. I am using the following bash line to parse the file ...
1
vote
0answers
19 views

Are External API's secure? [closed]

I'm new to java. So please someone explain me if we can use external API's in my work? Are they secure to use?
1
vote
1answer
14 views

JRE version on solaris + Invalid argument when runing JRE java

I located the Jre1.6 in my Solaris machine under /tmp in order to use the Jre version pwd /tmp ls -ltr jre1.6 total 512 -r--r--r-- 1 root root 917 Oct 3 2011 Welcome.html ...
0
votes
1answer
43 views

Cannot start Tomcat 7 as Apache Commons Daemon

I've been following the install process as recommended here. I'm trying to run Tomcat as a Unix daemon as described in the docs. However, when I run $CATALINA_HOME/bin/jsvc like this (note, I added ...
0
votes
0answers
9 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 ...
1
vote
2answers
139 views

How to restart my java program automatically if it gets killed?

I am running my runnable jar in linux machine (machineA) as shown below. In the runnable Jar, I have a java program which sends email to me every 15 mniutes. ...
1
vote
0answers
26 views

Limit max thread use for multithreaded java app

I have downloaded a .jar file and am using java with it, and it seems multithreaded, which is great ... unless I don't want it to be multithreaded, or unless I want to use only N threads with it. Is ...
1
vote
1answer
30 views

How do I synchronize 2 xml files?

I have 2 xml files named 1k.xml and 1n.xml. The file 1k.xml contains some additional elements and data which are not there in 1n.xml. I want to copy whatever is absent in 1n.xml to it, so that both ...
7
votes
4answers
9k views

Command Line Tool for monitoring Java Heap

Is there any command line tool for monitoring the heap size usage of Java in CentOS?
2
votes
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 ...
0
votes
1answer
862 views

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 ...
0
votes
3answers
621 views

Solaris jdk 7 installation error java -version No such file or directory

Am trying to follow this website for instruction on how to install jdk for Solaris 10 with the following information: $ isainfo -v 64-bit amd64 applications ssse3 tscp sse3 sse2 sse fxsr mmx ...
0
votes
0answers
31 views

File not read by Java until touched

We had a freak incident on Solaris. Our java program couldn't read a file until we touched the file. It was reading other files just fine, it just seemed to be completely blind to this one particular ...
0
votes
2answers
53 views

Java does not run with error “No such file or directory”, despite it exists and is x86_64

The file exists but bash complains it doesn't when asked to execute it. $ ./Libs/openjdk-1.8.0_60-eap/bin/java bash: ./Libs/openjdk-1.8.0_60-eap/bin/java: No such file or directory $ ls -l ...
0
votes
1answer
57 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 ...
0
votes
1answer
24 views

Which way is safer to read data from /sys

I am attempting to write a program that will monitor the temperature of various hardware components. The language I chose for it is Java. Now there are two ways I could read the temperatures: a) Do ...
0
votes
0answers
9 views

error in build to process builder in java [migrated]

I have devloped myself tagger and I want to host on the web. my server is based on jsp. But This tagger is based on svmtool and it has been written in Perl script. That's why, I have created one ...
0
votes
1answer
520 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 ...
2
votes
1answer
153 views

Running unsigned javaws code

For a KVM remote console I need to be able to run a jnlp file. When I run it I get: net.sourceforge.jnlp.LaunchException: Fatal: Initialization Error: Could not initialize application. at ...
0
votes
0answers
18 views

Syntastic, Vim & Android: get them play well together

I've got a problem configuring my development environment for android. I'm migrating away from Android Studio due to continious issues that I have no desire to solve anymore. I'm a long-time VIM ...
-1
votes
2answers
80 views

Run GUI Java jar on system boot Lubuntu

I have a PC which runs Lubuntu 14.10 without a monitor. The user is autologged in. I have created a Sysvinit script and installed it on /etc/init.d. My script amongst other things, starts a jar file ...
3
votes
5answers
3k views

A system-wide way to set or get $JAVA_HOME in Ubuntu?

I wonder whether Ubuntu itself provides a system-wide way to find the current JAVA_HOME or whether there is right place for setting JAVA_HOME. Mac OS X does well in this, for /usr/libexec/java_home ...
0
votes
0answers
15 views

when idle tomcat runs on 3.9% CPU

I would like to know if it is normal that tomcat7 runs on 3.9% CPU when idle? I saw all other processes are at 0%, only tomcat7 is always at least 3.9%. Thanks
0
votes
1answer
79 views

Can't install JPCAP library

I can't install JPCAP on my ubuntu machine. It tells that depends on sun-java6-jdk & libpcap0.8. However I do have them installed in my system as you can see. kujim@kujim:~/Downloads$ ldconfig ...
0
votes
1answer
26 views

Java in Gnu/linux servers

What is the use of installing java in linux server. I have seen initialising java paths in .bashrc and using them in different scripts. What does this all mean.please help. Dont have much knowledge ...
0
votes
1answer
72 views

Installing Java JDK in busybox in an LXC container - java/lang/NoClassDefFoundError: java/lang/Object

In a web application I'm developing, users will be able to upload java code and I will need to compile and run that. For security reasons, I'd like to that inside an LXC container, and for footprint ...
0
votes
1answer
29 views

How to use Linux Kernel [duplicate]

I would like to build a very small and simple operating system that runs java application on top of Linux kernel just like android, just to improve my knowledge and to build some hands on experience ...
1
vote
1answer
55 views

Jar on Raspberry Pi not responding after a long time

Hello I made a java program with friend that is designed to run 24/7 as a personal assistant on a headless Raspberry Pi. It basically can be used as an alarm and to tell us the weather or news etc. So ...
2
votes
1answer
44 views

calling javac from CentOS 7

I want to be able to use the javac command on the CentOS 7 terminal. How do I set the PATH variable in order to accomplish this? The following explains relevant aspects of my current environment. ...
0
votes
1answer
355 views

Running Java classes in a package --> Error: Could not find or load main class

I'm learning how to compile and run java classes in terminal using the commands javac and java. I have no problem compiling and running an individual class, however, when I put that class into a ...
-1
votes
1answer
43 views

How can I set an environment path of Java (jdk) in Linux-KDE?

I´ve installed Linux-KDE on my Chromebook and I managed to install the jdk8 of JAVA, too, however, I don´t know how to set an environment path in this kind of linux-distribution. How can I do set ...
3
votes
1answer
140 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? ...
0
votes
1answer
34 views

What is the meaning of local[4] in this example

I am looking at this example from the apache spark documentation. It seems to pass a variable called local[4] into the --master variable. I have not seen that before. What does it mean? I am using ...
1
vote
1answer
28 views

Removing jre7 installs jre6

I am working under Mint 16 and I want to remove jre7 packages (openjdk-7-jre, openjdk-7-jre-lib and openjdk-7-jre-headless) since I don't need them anymore. Using synaptic or apt-get I can easily get ...
1
vote
1answer
85 views

Java Client Connection Refused by Linux Server

I have a Java server and client, which is a simple server that prints a message when the client communicates with it. It works perfectly fine when the client and server are on the same machine. When I ...
1
vote
0answers
64 views

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 ...
0
votes
1answer
108 views

archlinux cannot execute java after update

I 've updated raspberry pi b+ arch linux via pacman -Syyu and now I cannot run java anymore because of following error: [xxxx@pi ~]# java -bash: /usr/bin/java: cannot execute binary file: Exec format ...
5
votes
1answer
643 views

Dead keys not working in Java Swing applications

I'm currently using Ubuntu 10.10 and Netbeans 7.0 and I can't type accented letters with dead keys any more. It's not a version specific problem seems it's related with Swing since I've got the same ...
1
vote
0answers
32 views

java version not found in redhat

My OS is redhat linux. It's having the default java 1.4.2, but I need java 1.7.45, for that I am trying as follows: /usr/sbin/alternatives --install /usr/bin/java java /u01/java7/bin/java 5 ...
0
votes
1answer
420 views

Trying to install rpm package in Fedora 21, but dependency on OpenJDK 7 results in errors

I am running Fedora 21 32bit workstation version. Trying to install iris-4.22.0-1.noarch.rpm: [itse@localhost Downloads]$ sudo yum install iris-4.22.0-1.noarch.rpm [sudo] password for itse: Loaded ...
2
votes
0answers
53 views

How can the RES memory reported for a Java process be higher than the VIRT memory?

I've been monitoring a Java process (Oracle Weblogic) using TOP and have observed that sometimes the following will happen: RES will increase from it's usual stable level of 2,097,152 KB up to ...
0
votes
1answer
53 views

Convert serialized Java object to human readable

I have object of class class X { private DateTime dt; "constructor, set/get" } I have one instance of this object serialized in file.bin. I want to show content of `file.bin on the Linux ...