
public class Sandbox {

	public static void main(String[] args) {
		int os;
		String buffer = System.getProperty("os.name");
		if (buffer.indexOf("Linux")!=-1) {
			os = 0;
		} else if (buffer.indexOf("Windows")!=-1) {
			os = 1;
		} else if (buffer.indexOf("Mac OS")!=-1) {
			os = 2;
		} else {
			System.err.println("Error: Operating system not supported.\nNow exiting...");
			System.exit(1);
		}
		

	}

}
