Java Utililty Methods Network Interface Get

boolean isNixMashPC = false;
try {
    for (Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces(); e.hasMoreElements();) {
        NetworkInterface ni = e.nextElement();
        if (ni.getDisplayName().equals("wlp5s0"))
            isNixMashPC = formatMac(ni.getHardwareAddress()).equals("10-FE-ED-84-9E-A9");
} catch (SocketException e) {
...

List<NetworkInterface> interfaces = new ArrayList<NetworkInterface>(10);
if (s == null)
    return null;
StringTokenizer tok = new StringTokenizer(s, ",");
String interface_name;
NetworkInterface intf;
while (tok.hasMoreTokens()) {
    interface_name = tok.nextToken();
...

out.println("Pinging from interface " + name);
boolean connected = false;
NetworkInterface networkInterface = NetworkInterface.getByName(name);
if (networkInterface == null) {
    out.println("No network interface for " + name);
    return false;
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
...

StringBuilder sb = new StringBuilder();
boolean first = true;
for (T obj : objs) {
    if (first)
        first = false;
    else
        sb.append(", ");
    sb.append(obj);
...

Enumeration<NetworkInterface> network_interfaces = NetworkInterface.getNetworkInterfaces();
while (network_interfaces.hasMoreElements()) {
    NetworkInterface net_if = network_interfaces.nextElement();
    pout.println("  " + net_if.getName());

return NetworkInterface.getByName(niName);