How to find Operating System information?

Hi,
Through my Java programme, I wanted to find the Operationg System information (e.g Windows / Linux / Solaris , etc..) How can I do this. Are there any methods in Java for this? Please let me know.
Thanks

System.getProperty("os.name")
System.getProperty("os.arch")
System.getProperty("os.version")
System.getProperty("java.version")
System.getProperty("java.vendor")

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