[Java][OS] Detect All System type

java os

http://www.code4copy.com/java/detecting-os-type-in-java/

public class OSInfo {
    public enum OS {
        WINDOWS, UNIX, POSIX_UNIX, MAC, OTHER
    }
    private static OS os = OS.OTHER; 
    static {
        try {
            String osName = System.getProperty("os.name");
            if (osName == null) {
            throw new IOException("os.name not found");
        }
        osName = osName.toLowerCase(Locale.ENGLISH);
        if (osName.indexOf("windows") != -1) {
            os = OS.WINDOWS;
        } else if (osName.indexOf("linux") != -1
        || osName.indexOf("mpe/ix") != -1l
        || osName.indexOf("freebsd") != -1
        || osName.indexOf("irix") != -1
        || osName.indexOf("digital unix") != -1
        || osName.indexOf("unix") != -1) {
            os = OS.UNIX;
        } else if (osName.indexOf("mac os x") != -1) {
            os = OS.MAC;
        } else if (osName.indexOf("sun os") != -1
            || osName.indexOf("sunos") != -1
            || osName.indexOf("solaris") != -1) {
                os = OS.POSIX_UNIX;
        } else if (osName.indexOf("hp-ux") != -1
            || osName.indexOf("aix") != -1) {
            os = OS.POSIX_UNIX;
        } else {
            os = OS.OTHER;
        }
        } catch (Exception ex) {
            os = OS.OTHER;
        }
    }
    public static OS getOs() {
    return os;
    }
}