import java.io.IOException;
import java.net.InetAddress;
public class MainClass {
public static void main(String[] args) throws IOException {
try {
int timeout = 2000;
InetAddress[] addresses = InetAddress.getAllByName("www.java2s.com");
for (InetAddress address : addresses) {
if (address.isReachable(timeout))
System.out.printf("%s is reachable%n", address);
else
System.out.printf("%s could not be contacted%n", address);
}
} catch (Exception e) {
System.out.printf("Unknown host: %s%n", "www.java2s.com");
}
}
}
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