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try {
InetAddress address = InetAddress.getLocalHost();
NetworkInterface netCard = NetworkInterface
.getByInetAddress(address);
byte[] addr = netCard.getHardwareAddress();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < addr.length; i++) {
if (addr[i] != 0) {
sb.append("-");
}
String string = Integer.toHexString(addr[i] & 0xff);
sb.append(string.length() == 1 ? "0" + string : string);
}
System.out.println(sb.toString().toUpperCase());
} catch (SocketException e) {
e.printStackTrace();
} catch (UnknownHostException e) {
e.printStackTrace();
}
com.sun.management.OperatingSystemMXBean operatingSystemMXBean = (com.sun.management.OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
operatingSystemMXBean.getTotalPhysicalMemorySize();
Runtime.getRuntime().availableProcessors()