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Questions tagged [jamvm]

JamVM is an open source, small, clearly written, interpreter-only Java virtual machine, ported to a wide variety of different platforms.

This machine has been written by Robert Lougher and used to be a popular tool for developing alternative Java system libraries, at the time when it was required. The compiled binary is comparatively very small (around 200 K executable only). It supports the full specification, including object finalization, Soft/Weak/Phantom References, class-unloading, JNI and reflections. When porting to the new platform, IO and similar features are provided through JNI.

The code is available under GPL. More can be found here.

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JamVM on Motorola FX9500 Problems - what should I do?

I am using a Motorola FX9500 RFID reader, which runs Linux with the jamvm version 1.5.0 on it (I can only deploy applications to it - I cannot change the Java VM or anything so my options are limited) - here's what I see when I check the…
kmp
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how to build GNU Classpath and JamVM

I'm trying to build GNU Classpath 0.98 and JamVM 1.5.2. Following the JamVM readme, I did 'configure; make; make install' on the jamVM, and it worked. I then added jamvm and Sun javac to the path. Then with GNU Classpath I did this: ./configure…
michelemarcon
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How to force Java/awt to use a specific toolkit (qt)?

I am working on an embedded Linux device that has only qt. For some reason, Java decides to use gnu.java.awt.peer.gtk.GtkToolkit. How can I force it to use gnu.java.awt.peer.qt.QtToolkit instead (or change the default behavior)?
bgw
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C/Posix Questions

I have been working for two weeks on JamVM, a small but powerful Java Virtual Machine. Now I am trying to figure how the memory is implemented and I am stuck on two C stupid problems: char *mem = (char*)mmap(0, args->max_heap,…
scoobyclown
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Building jamvm 1.5.4 on OS X Lion

I have Xcode installed and the commandline tools are working. Macports fails to build jamvm 1.5.0 correctly so I'm trying to build the latest version (1.5.4) manually. ./configure doesn't complain about anything. make fails with the following…
Tomas Andrle
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buildroot with jamvm 2.0 for java 8

I have a fat jar which uses java 8 features.I would like to use it with buildroot. But as I am reading on it for a couple of days, the jamvm version 2.0 supports java 8 and because of GNUClasspath limitations it we can't use any java 8.0 complaint…
g0c00l.g33k
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JamVM classes outside core java on iPhone

So I have an old iPhone (first generation) laying around, and I thought I could use it to do some fun stuff. I jailbroke it, and installed the Java package off cydia. However, whenever I try to use any classes that are outside of core java (anything…
bakadPotatis
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Cross compiling JamVM for ARM linux using UBUNTU and arm-linux-gnueabi-gcc - zlib missing

I'm trying to build JamVM for FriendlyARM mini 2440!(http://www.friendlyarm.net/products/mini2440) I installed ARM GCC using this command: sudo apt-get install gcc-arm-linux-gnueabi Next I did: export…
ehsun7b
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java.io.IOException: Permission denied with Wake on Lan

I've written this code for implementing Wake On Lan: InetAddress address = InetAddress.getByAddress( new byte[]{(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff}); DatagramPacket packet = new DatagramPacket(bytes, bytes.length, address,…
michelemarcon
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Drools: Compiling rules (or loading compiled rules) fails with obscure exceptions in JamVM

I'm developing a framework that, as one of its features, enables robots to use a rule based system. We began with Jess as the RBS, and now wanted to implement drools (using Drools 5.2.0 final), which works on our development machines running on…
Silly Freak
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Suspend JamVM and Restart It?

I am working on JamVM, a popular small Java VM, and I would like to stop it (suspend all the threads), execute a function within the VM (a C function) and then restart all the threads. I tried to handle a signal (Ctrl-C), execute my function, but…
scoobyclown
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Safely long running java process in background

I have three jar files that should run forever in background in a embedded system. I am actually do this with jamvm -jar program.jar & over a ssh-session. But the jar file exits after one day running in background and have a unpredictable…
Sadik Hasan
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How to do Remote Debugging in JamVM?

I've got jamvm version 1.5.4 (java version 1.5.0) and I don't have any choice about upgrading or changing it (actually, I think that is the latest version anyway). I would dearly love to attach a remote debugger to some ropey old code I wrote so…
kmp
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JVM- how to find and compare which JVM is better for linux? JAMVM vs OPENJDK.

Is there any tool to compare memory footprint of different JVMs. currently running on JAMVM. I want to know, how to compare JVM. and what are the deciding factors.
Ankur Loriya
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Does groovy run on jamvm?

I wanted to run groovy on jamvm in an embedded hardware. The following is what I have tried, but nothing works. 1) $GROOVY_HOME/bin/groovy ... It complains that JAVA_HOME is not set. Since JamVm is a standalone executable, how, if possible, to set…
lqu
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