java获取计算机mac物理地址

以下是Java代码示例，用于获取计算机的MAC物理地址：

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

public class MacAddress {
    public static void main(String[] args) {
        try {
            InetAddress localhost = InetAddress.getLocalHost();
            NetworkInterface networkInterface = NetworkInterface.getByInetAddress(localhost);
            byte[] macBytes = networkInterface.getHardwareAddress();
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < macBytes.length; i++) {
                sb.append(String.format("%02X%s", macBytes[i], (i < macBytes.length - 1) ? "-" : ""));
            }
            System.out.println("MAC Address: " + sb.toString());
        } catch (UnknownHostException | SocketException e) {
            e.printStackTrace();
        }
    }
}

该代码获取本机的InetAddress对象，然后通过getHardwareAddress()方法获取MAC物理地址，最后将结果转换成十六进制格式输出。需要注意的是，获取MAC地址需要在本地计算机上执行，无法通过远程方式获取。