System.getProperty()

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