Java System Property

java.version            Java Runtime Environment version
java.vendor            Java Runtime Environment vendor
java.vendor.url            Java vendor URL
java.home            Java installation directory
java.vm.specification.version                    Java Virtual Machine specification version
java.vm.specification.vendor                    Java Virtual Machine specification vendor
java.vm.specification.name                    Java Virtual Machine specification name
java.vm.version            Java Virtual Machine implementation version
java.vm.vendor            Java Virtual Machine implementation vendor
java.vm.name            Java Virtual Machine implementation name
java.specification.version                Java Runtime Environment specification version
java.specification.vendor             Java Runtime Environment specification vendor
java.specification.name        Java Runtime Environment specification name
java.class
.version                        Java 
class
 format version number
java.class
.path                  Java 
class
 path
java.library.path                        List of paths to search when loading libraries
java.io.tmpdir                Default temp file path
java.compiler            Name of JIT compiler to use
java.ext.dirs            Path of extension directory or directories
os.name                Operating system
 name
os.arch                Operating system
 architecture
os.version            Operating system
 version
file.separator            File separator ("/"
 on UNIX)
path.separator            Path separator (":"
 on UNIX)
line.separator            Line separator ("\n"
 on UNIX)
user.name            User's account name
user.home            User's home directory
user.dir                User's current working directory