System Properties in the Windows operating system

Using System.getproperties (Java.os.name)
Parameters can also be os.arch, os.version

Here are some more:

Returns the current set of system properties used by the GetProperty (String) method as a Properties object. If there is no collection of current system properties, a collection of system properties is created and initialized first. This collection of system attributes always contains the value of the following key: A description of the key correlation value

Java.version Java Runtime Environment version

Java.vendor Java Runtime Environment Vendor

Java.vendor.url Java Vendor's 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 Provider

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 the list of paths to search when loading libraries

Java.io.tmpdir Default Temporary file path

Java.compiler the name of the JIT compiler to use

Java.ext.dirs the path of one or more extended directories

Os.name the name of the operating system

Architecture of the Os.arch operating system

Os.version version of the operating system

File.separator file Separator (in UNIX system is "/")

Path.separator path Separator (in UNIX system is ":")

Line.separator line delimiter (in UNIX system is "n")

User.Name User's account name

User.home User's home directory

User.dir User's current working directory