Get Operating System Name , Version , Architectur in Java

System class has method getProperty in which u need to pass "KeY"

Key
Description of Associated Value
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

Ex.

User's current working directory
osname = System.getProperty("os.name");
osversion = System.getProperty("os.version");
arch = System.getProperty("os.arch");

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