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Debian Java FAQ.
Chapter 4 - Java Virtual Machines (JVM)

4.1 What jvms work in Debian?

Currently Blackdown's, Sun's and Ibm's jvms work in Debian. (But, for simple programs such as the ones used for teaching, the free kaffe VM may be enough. Another solution is to use gcj and to compile to native code, thus solving the VM problem.)

All of them can be unpacked in /usr/local with links made in /usr/local/bin. This will work in any Debian setting and version, the only issue being is wether or not the version is glibc based or libc5-based regarding (older versions of Debian do not have glibc support since it was included in Debian 2.1 codename slink)

4.2 What free JVMs are available in Debian?

• kaffe. Cannot run all programs, although it is alleged to run Jigsaw (a 10Mb distribution) see http://www.de.debian.org/Lists-Archives/debian-java-9911/msg00038.html.

4.3 Are there known problems?

• Kaffe loops endlessly on the XML parsing.

Debian Java FAQ.