import java.net.URL;
public class OS {
?public static final String CLASS_PATH;
?public static final boolean isLinux;
?static {
??URL resource = OS.class.getResource("OS.class");
??String classPath = resource.getPath();
??String className = OS.class.getName().replace('.', '/') + ".class";
??String classesPath = classPath.substring(0, classPath.indexOf(className));
??
??if (System.getProperty("os.name").toUpperCase().indexOf("WINDOWS") != -1&& classesPath.startsWith("/")) {
???classesPath = classesPath.substring(1);
???isLinux = false;
??} else {
???isLinux = true;
??}
??CLASS_PATH = classesPath;
?}
?
?public static void main(String arg[]){
??
??System.out.println(OS.isLinux);
?}
}