Java/Network Protocol/NetworkInterface
Содержание
- 1 An updated version of the ListNets program that uses the NetworkInterface enhancements
- 2 Extract network card address with java.net.NetworkInterface
- 3 Get MAC address of a host: java.net.NetworkInterface.getHardwareAddress().
- 4 List Network Interfaces
- 5 Programmatic Access to Network Parameters
- 6 Report By Name
An updated version of the ListNets program that uses the NetworkInterface enhancements
<source lang="java">
import java.io.Console; import java.net.InetAddress; import java.net.InterfaceAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.Arrays; import java.util.Collections; import java.util.Enumeration; import java.util.List; public class Main {
public static void main(String args[]) throws SocketException { Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces(); for (NetworkInterface netint : Collections.list(nets)) { displayInterfaceInformation(netint); } } private static void displayInterfaceInformation(NetworkInterface netint) throws SocketException { System.out.printf("Display name: %s%n", netint.getDisplayName()); System.out.printf("Name: %s%n", netint.getName()); Enumeration<InetAddress> inetAddresses = netint.getInetAddresses(); for (InetAddress inetAddress : Collections.list(inetAddresses)) { System.out.printf("InetAddress: %s%n", inetAddress); } System.out.printf("Parent: %s%n", netint.getParent()); System.out.printf("Up? %s%n", netint.isUp()); System.out.printf("Loopback? %s%n", netint.isLoopback()); System.out.printf("PointToPoint? %s%n", netint.isPointToPoint()); System.out.printf("Supports multicast? %s%n", netint.isVirtual()); System.out.printf("Virtual? %s%n", netint.isVirtual()); System.out.printf("Hardware address: %s%n", Arrays.toString(netint.getHardwareAddress())); System.out.printf("MTU: %s%n", netint.getMTU()); List<InterfaceAddress> interfaceAddresses = netint.getInterfaceAddresses(); for (InterfaceAddress addr : interfaceAddresses) { System.out.printf("InterfaceAddress: %s%n", addr.getAddress()); } System.out.printf("%n"); Enumeration<NetworkInterface> subInterfaces = netint.getSubInterfaces(); for (NetworkInterface networkInterface : Collections.list(subInterfaces)) { System.out.printf("%nSubInterface%n"); displayInterfaceInformation(networkInterface); } System.out.printf("%n"); }
}
</source>
Extract network card address with java.net.NetworkInterface
<source lang="java">
import java.net.NetworkInterface; import java.net.SocketException; import java.util.Arrays; import java.util.Enumeration; public class Main {
public static void main(String args[]) throws SocketException { Enumeration<NetworkInterface> nets = NetworkInterface .getNetworkInterfaces(); while (nets.hasMoreElements()) { NetworkInterface netint = nets.nextElement(); System.out.println("Display name: " + netint.getDisplayName()); System.out.println("Hardware address: " + Arrays.toString(netint.getHardwareAddress())); } }
}
</source>
Get MAC address of a host: java.net.NetworkInterface.getHardwareAddress().
<source lang="java">
import java.net.InetAddress; import java.net.NetworkInterface; public class Main {
public static void main(String[] args) throws Exception { InetAddress address = InetAddress.getLocalHost(); NetworkInterface ni = NetworkInterface.getByInetAddress(address); byte[] mac = ni.getHardwareAddress(); for (int i = 0; i < mac.length; i++) { System.out.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""); } }
}
</source>
List Network Interfaces
<source lang="java">
import java.net.NetworkInterface; import java.util.Enumeration; public class Main {
static public void main(String args[]) throws Exception { Enumeration interfaces = NetworkInterface.getNetworkInterfaces(); while (interfaces.hasMoreElements()) { NetworkInterface ni = (NetworkInterface) interfaces.nextElement(); System.out.println(ni); } }
}
</source>
Programmatic Access to Network Parameters
<source lang="java">
import java.net.InetAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.Collections; import java.util.Enumeration; public class Main {
public static void main(String args[]) throws SocketException { Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces(); for (NetworkInterface netint : Collections.list(nets)) { displayInterfaceInformation(netint); } } private static void displayInterfaceInformation(NetworkInterface netint) throws SocketException { System.out.printf("Display name: %s%n", netint.getDisplayName()); System.out.printf("Name: %s%n", netint.getName()); Enumeration<InetAddress> inetAddresses = netint.getInetAddresses(); for (InetAddress inetAddress : Collections.list(inetAddresses)) { System.out.printf("InetAddress: %s%n", inetAddress); } System.out.printf("%n"); }
}
</source>
Report By Name
<source lang="java">
import java.net.NetworkInterface; public class Main {
static public void main(String args[]) throws Exception { NetworkInterface ni = NetworkInterface.getByName(args[0]); System.out.println(ni); }
}
</source>