JVM (Java Virtual Machine) is a program that loads and runs Java applications by converting the bytecodes into machine executable code.

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Java (SE) program execution is too slow on Debian Wheezy… do I need to “tune” the JVM?

SuperUsers. I wrote a desktop program to execute a simulation process (not worth copying the code here... it's quite a long program). If I run it on a MacBook Pro (Intel Core i7 2.2 GHz, 4GB RAM), it ...
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Windows running 2 different version JVMs in Windows for different browsers?

Using windows xp/7/vista. Is it possible and if so how; can I run 2 different versions of Java so 2 different browsers (firefox/chrome/IE/anyother) can use the specific JVM. Without the use of ...
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Wrong OEM while trying to use FlashTool. (Android Rooting)

I am trying to follow this link to install FlashTool so that I can root my Micromax Canavas HD. My Dev Enviornment is Ubuntu 12.04 LTE 64 bit with support libs for 32 architecture. I as well changed ...
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How to run .j filetype on a linux machine?

The title says everything else for it self. I've tried to execute this .J file for hours now. As far as i understood it contains java byte-code which can be executed by oracle java virtual machine. ...
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JVM symlink messed up

I was checking the symlink for the jvm in my Ubuntu box. I don't understand why java-1.6-openjdk is symlinked to java-1.7.0-openjdk-amd64?
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Are there any JVM running on GPU

I haven't seen any, but are there any JVM that is build for CUDA or DirectCompute? I've seen the advantage of having an application run in the CPU as well as offload process to the available GPU.
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Does Android or Java use more power since it's running on a virtual machine?

Since Android applications run on a JVM (Dalvik VM) which is basically a virtual processor, and every virtual instruction has to be mapped to the underlying chipset's native instruction, does this ...
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Oracle Session Numbers Going Crazy - What is the best strategy to over come this issue?

We have a JVM web application which is running on Oracle Application Server and it uses commons-dbcp (http://commons.apache.org/proper/commons-dbcp/) and implicit connection pooling. Our db is Oracle. ...
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How to set Java VM settings globally on Debian system?

when running java -version I get this error: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. This is avoidable ...
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How to fix font anti-aliasing in IntelliJ IDEA when using high DPI?

I use a higher DPI setting which makes IntelliJ (actually Android Studio) have really messed up fonts. I use MacType which renders my fonts beautifully elsewhere, but I guess Java VM somehow ...
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115 views

Java crashes on startup with an UnsupportedCharsetException

I'm under Windows7/64, recently, everything related to Java stopped working(Netbeans, Jdownloader...) Even if i run the command line: java -version i get this exception: Error occurred during ...
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Running different programs via ssh

I got some problem when I tried to run different programs via SSH. The problem is, let's say I have 2 different java programs, then I would like to run them simultaneously on different JVM, in order ...
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478 views

Does Intel core i3 uses Dynamic CPU frequency switching?

I am using a VisualVM which is a Java Virtual Machine profiler. I am trying to start the application jvisualvm and it giving the message I am working on a Sony Vaio laptop model number VPCEA24FM ...
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903 views

What kind of JVM support is there for Modern UI apps?

Obviously, the JRE and Java applications and applets still work on the Desktop version of Windows 8. But is there a way to develop a Modern UI application in Java, or another JVM based language such ...
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1answer
207 views

Is it a neccessary to reboot computer after changes in system variables?

I change jdk path and JAVA_HOME in system variables from one to another and after that i open cmd and try: java -version and result of version not change to another jdk if my memory doesn't fail ...
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How to install 32-bit OpenJDK on 64-bit Unbuntu (and CentOS)?

I'm running 64-bit Ubuntu. I have a Java program that bundled with a 32-bit native library. I found no way to run it on the default 64-bit OpenJDK and manage to get a 32-bit one instead. But when I ...
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unable to set xmx beyond 4gb on system having 8gb RAM

I need to set ANT_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m JAVA_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m I have a system with 8gb(recently ...
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74 views

JVM implementation tests

I have been developing grails for some time now, and I keep running into platform dependent behavior. I have found bugs that only happen on legitimate versions of Windows and I have found bugs that ...
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360 views

change installed version of icedtea

I've installed openJDK6 64-bit server on my ubuntu image running in a VM. I installed it here in order to do some testing in comparison with our production environment. however, our production ...
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Do I have a Java Virtual Machine on my Windows 7?

How can I find out if there is Java Virtual Machine installed on my Windows 7?
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Is there a way to run multiple JVM within the same browser?

I'm using Oracle at work which fires off a Java app. I'd like to use two instances of the same app to work between two different screens of the same app. I can do it but with Chrome opening one and a ...
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3answers
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Installing Eclipse

I need to install eclipse to use with PHP, so I downloaded it from eclipse.org, extracted the zip file, and tried to install eclipse. It was throwing an error like "JRE or JDK must be available ...
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Find path to current JVM

I need to find the path to the current Java VM running on my Windows machine. How can I do that?
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How do I update my Java?

I've downloaded Java SE Runtime Environment 6u24 and Java SE Development Kit 6u24, but when I go to CMD and type java -version it still says: java version "1.4.2_03" Java(TM) 2 Runtime Environment, ...
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405 views

Trying to install HP OfficeJet G85 All-in-One printer software on Windows XP

I have been running this printer successfully on a Windows 2000 partition. Because I wanted to use newer fonts available in XP, I decided to try to install the printer software and driver on the ...
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How to make Microsoft JVM work on Windows 7?

I am struggling with the following problem. I cannot install MS JVM 3810 properly on Windows 7. When I start Interner Explorer 8 without starting any java 1.1 programs choosing Java custom settings ...
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Is it possible to preload JVM to make starting of little one-shot java applications faster?

Expected algorithm: You start JVM without actual application (only telling it to load some jars), it loads and listens a socket and waits in a background. When you start the application ...
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unable to access jarfile alliance.tmp

I've just installed the p2p software Alliance. Whenever I'm trying to open Alliance a "Java Virtual Machine Launcher" window pops up with this error message: "unable to access jarfile alliance.tmp". ...