CODEWITHSUNDEEP
javawindowsnetwork-interface
Dave Novelli
Dave Novelli

Reputation: 2184

Obtain "Media State" of network adapters in windows using java?

How can I obtain the media state of a network adapter in windows? I've searched a bit and it doesn't look like the java.net.NetworkInterface class provides this ability, which makes sense as it appears to be a windows concept that doesn't even apply to all adapters. When I run ipconfig I get something like the following:

Windows IP Configuration


Wireless LAN adapter Wireless Network Connection 5:

   Connection-specific DNS Suffix  . : BlahBlah.Blah
   IPv4 Address. . . . . . . . . . . : 192.168.113.44
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.113.1

Ethernet adapter Local Area Connection 8:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : BlahBlah.Blah

And if I use the script found at Can anyone explain why Java GetNetworkInterfaces returns so many interfaces on Windows 7 to obtain details from these adapters (with the others removed) I get something like the following:

Display name: Software Loopback Interface 1
Name: lo
InetAddress: /0:0:0:0:0:0:0:1
InetAddress: /127.0.0.1
Up? true
Loopback? true
PointToPoint? false
Supports multicast? true
Virtual? false
Hardware address: []
MTU: -1

Display name: Intel(R) 82579LM Gigabit Network Connection #2
Name: eth13
InetAddress: /172.16.4.29
Up? false
Loopback? false
PointToPoint? false
Supports multicast? true
Virtual? false
Hardware address: [60, -105, 14, -77, -123, 110]
MTU: 1500

Display name: Intel(R) Centrino(R) Advanced-N 6205 #3
Name: net11
InetAddress: /192.168.113.44
Up? false
Loopback? false
PointToPoint? false
Supports multicast? true
Virtual? false
Hardware address: [60, -105, 14, -77, -123, 110]
MTU: 1500

Thoughts on how I can determine if the ethernet adapter is "Media disconnected"?

Upvotes: 3

Views: 1109

Answers (1)

Manish Singh
Manish Singh

Reputation: 53

You can take reference of the below snippet. Basically !networkInterface.isUp() should do the trick for you.

List<NetworkInterface> nic = new ArrayList<>();
interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
    NetworkInterface networkInterface = interfaces.nextElement();
    if (!networkInterface.isUp())
        continue;
    nic.add(networkinterface);
}

Upvotes: 1

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