Java java.net.ProtocolFamily用法及代碼示例

// Java Program to get Protocol 
// family for an IP Address 
  
// import Guava library 
import com.google.common.net.InetAddresses; 
import java.io.*; 
import java.net.*; 
  
class GFG { 
    public static void main(String[] args) 
    { 
        try { 
            // to get the ip address of 
            InetAddress ip 
                = InetAddress.getByName("45.22.30.39"); 
            System.out.println("Host Name is "
                               + ip.getHostName()); 
  
            // getProtocolFamily() will check and return the 
            // protocol family of the given IP 
            ProtocolFamily protocolFamily 
                = getProtocolFamily(ip); 
  
            System.out.println("Protocol family of the "
                               + ip.getHostName() + " is "
                               + protocolFamily); 
        } 
        catch (Exception e) { 
            System.out.println("Some exception"
                               + e.getMessage()); 
        } 
    } 
  
    public static ProtocolFamily 
    getProtocolFamily(InetAddress inetAddress) 
    { 
        // to check if address is valid or not 
        if (InetAddresses.isInetAddress( 
                inetAddress.getHostName())) { 
            // if address is valid 
            // will return the protocol family of the 
            // address 
            return StandardProtocolFamily.INET; 
        } 
        else { 
            // address is not valid 
            System.out.println( 
                "Address " + inetAddress 
                + "is invalid hence can't determine the protocol family"); 
        } 
        return StandardProtocolFamily.INET; 
    } 
}