The minimal runtime system requirement for PXE is a version 1.4 or later Java2 Standard Edition Development Kit. (There are currently no plans to support 1.3 or earlier versions.)
PXE has been specifically tested on the following systems:
Operating System
Tested JDK Versions
Windows XP sp 2
SUN JDK 1.4.2_06 SUN JDK 5.0 Update 2
Linux
SUN JDK 1.4.2_04 IBM JDK 1.4.2SR1 SUN JDK 5.0 Update 2
Performance? PXE is engineered to provide the best reliable, correct performance. Actual runtime performance will depend on the hardware, operating system, and network configurations as well as message payload sizes, persistence configuration, and the structure of BPEL processes being executed.
Building PXE requires JDK 1.5, and the default build configuration produces a JDK 1.5-compatible executable. To build for a 1.4 JDK, PXE uses Retroweaver. See Building PXE for more information and instructions on how to compile for different target JVMs.