code: public static int getOSArch() {
  	if (osArch == -1) {
  	    osArch = toIntArch(System.getProperty("os.arch.data.model"));
  	    if (osArch == ARCH_UNKNOW) osArch = toIntArch(System.getProperty("os.arch"));
  	}
  	return osArch;
      }
docs: return the operating system architecture
  
  @return one of the following SystemUtil.ARCH_UNKNOW, SystemUtil.ARCH_32, SystemUtil.ARCH_64