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/* A class to test my java.net.InetAddress implementation */
import java.net.*;
public class TestNameLookups extends Object
{
public static void
main(String[] argv) throws UnknownHostException
{
InetAddress addr;
System.out.println("Started address lookup test");
/* Test local host */
try
{
addr = InetAddress.getLocalHost();
System.out.println("The local hostname is " + addr.getHostName() +
" with an IP address of " + addr.getHostAddress());
}
catch(UnknownHostException e)
{
System.out.println("WARNING: Can't resolve local hostname");
}
/* Test simple lookup by IP */
addr = InetAddress.getByName("18.159.0.42");
System.out.println("Looked up IP addres 18.159.0.42 and got back a " +
"hostname of " + addr.getHostName());
/* Test failed reverse lookup of IP */
addr = InetAddress.getByName("194.72.246.154");
System.out.println("Looked up IP addres 194.72.246.154 and got back a " +
"hostname of " + addr.getHostName());
/* Test mangled/invalid IP's */
try { addr = InetAddress.getByName("122.24.1."); }
catch (UnknownHostException e) {
System.out.println("Passed bad IP test 1");
}
try { addr = InetAddress.getByName("122.24.52"); }
catch (UnknownHostException e) {
System.out.println("Passed bad IP test 2");
}
try { addr = InetAddress.getByName("122.256.52.1"); }
catch (UnknownHostException e) {
System.out.println("Passed bad IP test 3");
}
/* Test simple lookup by name with external info */
addr = InetAddress.getByName("www.starnews.com");
System.out.println("Looked up host www.starnews.com and got back an " +
"IP address of " + addr.getHostAddress());
byte[] octets = addr.getAddress();
System.out.println("Raw Address Bytes: octet1=" + (int)octets[0] +
" octets2=" + (int)octets[1] + " octet3=" + (int)octets[2] +
" octets4=" + (int)octets[3]);
System.out.println("toString() returned: " + addr.toString());
System.out.println("isMulticastAddress returned: "
+ addr.isMulticastAddress());
/* Test complex lookup */
System.out.println("Looking up all addresses for indiana.edu ...");
InetAddress[] list = InetAddress.getAllByName("indiana.edu");
for (int i = 0; i < list.length; i++)
{
addr = list[i];
System.out.println(" Hostname: " + addr.getHostName() +
" IP Address: " + addr.getHostAddress());
}
/* Test equality */
InetAddress addr1 = InetAddress.getByName("www.urbanophile.com");
InetAddress addr2 = InetAddress.getByName("www.urbanophile.com");
if (addr1.equals(addr2) && addr2.equals(addr1))
System.out.println("Passed equality test #1");
else
System.out.println("Failed equality test #1");
addr1 = InetAddress.getByName("www.ac.com");
addr2 = InetAddress.getByName("www.hungry.com");
if (!addr1.equals(addr2) && !addr2.equals(addr1))
System.out.println("Passed equality test #2");
else
System.out.println("Failed equality test #2");
/* Quick test to see if it looks like we're caching things */
addr1 = InetAddress.getByName("www.urbanophile.com");
System.out.println("Got " + addr1.getHostName() + " " + addr1.getHostAddress());
addr2 = InetAddress.getByName("www.hungry.com");
System.out.println("Got " + addr2.getHostName() + " " + addr2.getHostAddress());
}
}
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